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Journal articles on the topic 'Radiant Heating and Cooling'

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Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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1

Yoo, Seung-Ho. "Thermal Behavior of Passive Intelligent Radiant Cooling Systems." Processes 10, no. 12 (December 12, 2022): 2666. http://dx.doi.org/10.3390/pr10122666.

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Efficient cooling and heating solutions for nearly zero-energy solar dwellings are required to mitigate climate change and to make dwellings sustainable. The installed pipeline for a radiant heating system, which is only used for space heating when heating is necessary, can also be used to cool the room with only the enthalpic use of natural city water by releasing the natural city water through the embedded pipeline already installed for radiant heating. Natural city water used for radiant cooling can be used in necessary locations such as for toilets, washing cars, laundry facilities, and garden water, which corresponds to approximately 56% of the water we use at home. As a result, the embedded pipes that make up a radiant heating system can be converted to a passive intelligent radiant cooling system with minimal added installation and control systems. Thermal comfort and behavior analyses in an enclosure with a radiant cooling system are fulfilled through experimentation, mean radiant temperature simulation, and asymmetric radiation calculation. No uncomfortable asymmetric radiation is encountered during the cooling period, so the cooling spaces are well controlled within the comfortable cooling range. A passive intelligent radiant cooling system that uses just the enthalpy of natural city water can be an appropriate ecological solution to better develop zero-energy dwellings. No extra cooling energy and power are required to cool a space that uses just enthalpy and pressure from natural city water.
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2

Kulkarni, Shubham S. "A Glance on Radiant Cooling Technology for Heating and Cooling for Residential and Commercial Building Application." Journal of Advanced Research in Applied Mechanics and Computational Fluid Dynamics 07, no. 3&4 (November 6, 2020): 13–19. http://dx.doi.org/10.24321/2349.7661.202005.

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As we know that nowadays due to the hot and humid weather and the increasing temperature the high amount of energy consumption is used for the heating & cooling purpose in residential as well as in commercial building for air conditioning systems. To overcome this problem and to reduce the energy consumption as well as good thermal comfort to people in the indoor environment, use the radiant heating & cooling system is a better way. This concept is used to cool or heat the room and absorbs the indoor sensible heat by thermal radiation. The system removes heat by using less energy and more energy-efficient. This system uses water as a medium to cool or heat the room space. There are three types discussed in these papers for cooling & heating. In this paper, we did an overall study regarding radiant heating and cooling systems. It reduces the energy lost due to the duct leakage. It also has a lower life cycle cost compared to conventional. In this paper, we have reviewed how to reduce energy consumption and give thermal comfortable air-condition through radiant cooling and chilled ceiling panel system.
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3

Du, Yan. "Feasibility Analysis of Radiant Floor Cooling and Heating System Applications." Applied Mechanics and Materials 716-717 (December 2014): 428–30. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.428.

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Radiant floor cooling and heating system is the new system which can shares the same tube to cooling in summer and heating in winter. It meet the requirements for human comfort , save energy, and reduce cost, so it is popular the field of building energy efficiency in recent years. This paper briefly describes the radiant floor cooling and heating field research at home and abroad and its advantages, and briefly analyses the factors of heat exchange efficiency in radiant floor cooling and heating system.
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4

Gendelis, Staņislavs, Jevgēnijs Teličko, Andris Jakovičs, and Indulis Bukans. "Radiant capillary heat exchangers – power calculation for optimal heating and cooling." Journal of Physics: Conference Series 2423, no. 1 (January 1, 2023): 012011. http://dx.doi.org/10.1088/1742-6596/2423/1/012011.

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Abstract The issue of switching to renewable energy sources becomes very actual and it is important not only to change the energy source, but also the reduce the final energy needs by improving the energy efficiency of buildings and usage of efficient heating systems. Heat pumps as the most popular renewable energy source are widely used, but their energy efficiency is depending on temperature of the supplied energy carrier. The most efficient are radiant capillary heat exchangers with a large surface area and a low temperature, which typically does not exceed 30°C. Another advantage of radiant capillary heat exchangers is the possibility to operate them in both - heating and cooling modes. Unlike the underfloor heating solution, where the role of thermal convection is very important, the built-in radiant capillary heat exchanger systems provide the energy mainly due to thermal radiation. This study explores two modelling approaches for determination of required power and corresponding area of radiant capillary heat exchangers to be installed in a room to provide heating and cooling: simplified approach, which allows to create the heat balance with a minimum amount of input data and a precise standard-based approach. Calculations were made for three different rooms with variable glazing area and spatial orientation using both approaches. Analysis of the calculation results shows the limits of the simplified method, which overestimates heating need and underestimates cooling need, and the main reason for such differences is simplification of room orientation and subsequent solar heat gains. As the calculated cooling power is less than heating power, therefore the heating estimation is sufficient to estimate the amount of radiant capillary heat exchangers in small/medium rooms for providing both heating and cooling in the climatic conditions of Riga. The use of complex, comprehensive modelling approaches is necessary for rooms with large glazed areas, where the simplified method gives incorrect estimations.
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5

Budiaková, Mária. "Effective Ventilation and Heating Systems in Office Buildings." Advanced Materials Research 649 (January 2013): 189–92. http://dx.doi.org/10.4028/www.scientific.net/amr.649.189.

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The paper is oriented on the effective ventilation, heating and cooling systems in office buildings by utilization of renewable energy sources. All these systems must be in mutual harmony and ensure thermal comfort. Ventilation system must use the power of wind, the heated air from the double skin facade, heat recovery system, preheating or cooling in the ground channel. In the summer, there must be used the night natural cooling of building. For the heating is the most suitable to use radiant floor heating (30%) in combination with radiant ceiling heating (70%). The next progressive way is the combination of new concrete core conditioning and floor convector heaters.
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6

Qin, S. Y., Y. A. Wang, S. Gao, D. G. Xu, X. Cui, M. Zhao, and L. W. Jin. "Heat transfer characteristics of a composite radiant wall under cooling/heating conditions." Indoor and Built Environment 29, no. 8 (September 24, 2019): 1155–68. http://dx.doi.org/10.1177/1420326x19876673.

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The radiant wall composited with capillary tubes has been widely applied in heating or cooling systems due to its large heat transfer area, low-temperature heating and high-temperature cooling. In this study, a ratio model of heat transfer in steady-state condition was established, which explores heat transfer capacity from the capillary layer (active layer) towards the indoor and outdoor sides. The experimental data including the radiant surface temperature, the capillary layer temperature and the heat flux distribution were collected in cooling and heating conditions. The proposed ratio model was validated. The results show that the fluctuation of indoor air temperature is relatively small, suggesting that the radiant system possesses higher stability. Results showed that thermal resistances of the composite radiant wall in summer and winter conditions vary greatly due to different moisture contents. With the continuation of the system operation, the calculated values from the ratio model under the steady-state condition were more consistent with average values obtained from experiments under unsteady-state conditions, indicating that the overall heat transfer performance of the composite radiant wall could be properly evaluated by the proposed model in engineering applications.
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7

Qin, Wenqi, Yingning Hu, Jinwen Su, and Yubang Hu. "A New Type of Air Conditioning System Based on Finned Ceiling Radiant Coupled with Independent Fresh Air and Its Thermal Comfort Experimental Study." Computational Intelligence and Neuroscience 2022 (September 17, 2022): 1–15. http://dx.doi.org/10.1155/2022/4144569.

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The traditional radiation air conditioning system has some problems, such as easy condensation, insufficient refrigeration capacity, complex structure, and control system. Therefore, this study proposes a new type of finned metal radiant plate with large heat flow per unit area, sufficient cooling capacity, and simplified heat exchange system, in order to realize large temperature difference between cooling and heating. The temperature field uniformity and thermal comfort test of a novel type of finned ceiling radiant panel and independent fresh air linked air conditioning system under summer cooling and winter heating circumstances are accomplished through artificially generated climate environments. The study’s findings demonstrate that in the radiation and fresh air modes, the maximum interior temperature differential under cooling conditions does not rise over 2.1°C. The maximum temperature differential in the space at any one moment in the radiation and fresh air modes cannot be greater than 3°C when heating conditions are present. The fresh air’s cooling and dehumidifying effects are clear. The dehumidification efficiency may reach 50%, and the moisture content ranges from 5.48 to 9.63 g/kg. With PMV ranging from −0.34 to 0.54, the enhanced air conditioning system in this research provides exceptionally good thermal comfort. Additionally, the finned radiant panel’s installation area occupies just 14% of the ceiling, which is sufficient to fulfill the room’s cooling and heating load needs as well as provide high thermal comfort and consistent indoor temperature. The theoretical investigation and practical implementation of the direct expansion radiant air conditioning system are both strongly supported by this research.
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8

Cai, Wei, Wen Lv, Le Xian Zhu, and Peng Feng Yang. "Numerical Simulation on Indoor Thermal Environment of Radiant Flooring Cooling System with Displacement Ventilation." Advanced Materials Research 743 (August 2013): 90–93. http://dx.doi.org/10.4028/www.scientific.net/amr.743.90.

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The purpose of this study is to investigate the thermal environment of a radiant floor cooling system using the existing radiant floor heating system. The thermal environment of the model office space was analyzed using Computational Fluid Dynamics (CFD) method. Two typical air distributions (hybrid air cooling system composed of radiant floor cooling and displacement ventilation and all-air system) were simulated. Installing two human models in the office, the characteristics of heat transportation from the human model were also analyzed. The results show that two air distribution forms can meet the demand of thermal comfort. The operative temperature in the radiant floor cooling system was lower than in the all-air cooling system when each of the sensible cooling loads of the two types of HVAC system was the same.
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9

Kim, Kwang Woo. "Virtual special issue – Radiant heating and cooling systems." Building and Environment 96 (February 2016): 301–2. http://dx.doi.org/10.1016/j.buildenv.2015.05.031.

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10

Rhee, Kyu-Nam, Bjarne W. Olesen, and Kwang Woo Kim. "Ten questions about radiant heating and cooling systems." Building and Environment 112 (February 2017): 367–81. http://dx.doi.org/10.1016/j.buildenv.2016.11.030.

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11

Bolotin, Kirill, Andris Jakovics, and Jevgenijs Telicko. "Model of radiant capillary heating and cooling system." Journal of Physics: Conference Series 2423, no. 1 (January 1, 2023): 012013. http://dx.doi.org/10.1088/1742-6596/2423/1/012013.

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Abstract Paper is devoted to the development and verification of a tool for modeling and designing radiant-panel heating and cooling systems. Source of radiation is capillary mats, which consist of tubes through which water flows with a temperature of 18°C to 32°C, depending on the operating mode. The tool is an analytical model that takes into account the radiation from capillary mats located on the ceiling and walls, the mutual radiation of all surfaces in the room, including doors and windows, simplified convection, as well as third-party sources of thermal energy, such as the sun, electronics and people. The model was compared with a similar numerical model created in Comsol Multiphysics, and also verified by experimental data.
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12

Klubal, Tomáš, and Milan Ostrý. "Integration of PCMs and Capillary Radiant Cooling/Heating to Ensure of Thermal Comfort." Advanced Materials Research 1041 (October 2014): 350–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1041.350.

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The thermal comfort of buildings occupants depends on the physical properties of applied building materials, on the solar heat gains through the transparent part of the external envelope and the mode of heating/cooling and ventilation. Capillary radiant cooling / heating can maintain a state of indoor environment in the required temperature range in accordance with legislative framework. The paper shows possibility how to improve thermal comfort and thermal stability in summer.Presented system uses phase change materials as a latent heat storage medium for better absorption of heat. Microencapsulated phase change materials Micronal® DS 5040 X and DS 5008X were used as latent heat storage medium in combination with gypsum plaster. Activation of phase change materials is carried out by capillary tubes with cooled / heated water circuit. At Institute of Building Structures at Faculty of Civil Engineering are located two rooms for comparative measurements. There were located thermal storage modules in the experimental room. Low- temperature radiant cooling and heating with phase change materials are one of the ways to reduce energy consumption and operating cost for cooling / heating. The paper presents the results of measurements for different modes of operation of cooling and heating.
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13

Shu, Haiwen, Hongbin Wang, and Guangyu Cao. "Thermal and flow resistance characteristics of a parallel-pipe type natural heat transfer air-conditioning terminal device for nearly zero energy buildings." Indoor and Built Environment 29, no. 9 (May 22, 2020): 1227–37. http://dx.doi.org/10.1177/1420326x20926708.

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A nearly zero energy building (NZEB) can achieve significant energy saving by reducing its air-conditioning load greatly. At the same time, an NZEB should also achieve a comfortable thermal environment. In this paper, a parallel-pipe type natural heat transfer air-conditioning terminal device is proposed and studied for use in NZEB. The terminal device is able to provide both heating and cooling (including sensible and latent cooling) for a building without noise or air disturbance. The advantages of the terminal device have been demonstrated by comparing with other air-conditioning terminals. Experimental data of the heating and cooling performance of the device under different operation conditions were collected and analysed. The calculation models for the heating and cooling capacities of the device were obtained through data regression analysis, and the flow resistance curve of the device was obtained by means of experimental measurement under various flow rates. In addition, comparison was made on the heating and cooling capacities between the device and a radiant floor that also features little noise or air disturbance. Results show that the heating and cooling capacities of the device were 41.5% and 46.8% higher than the maximum capacities of the radiant floor, respectively. This research laid a foundation for the engineering application of the air-conditioning terminal device.
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14

Radzai, Mohammad Hakim Mohd, Chong Tak Yaw, Chin Wai Lim, Siaw Paw Koh, and Nur Amirani Ahmad. "Numerical Analysis on the Performance of a Radiant Cooling Panel with Serpentine-Based Design." Energies 14, no. 16 (August 4, 2021): 4744. http://dx.doi.org/10.3390/en14164744.

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Radiant cooling systems (RCS) are gaining acceptance as a heating, ventilation, and air conditioning (HVAC) solution for achieving adequate thermal comfort and maintaining acceptable indoor air quality inside buildings. RCS are well known for their energy-saving potential; however, serious condensation problem hinders the growth of this technology. In order to prevent the risk of condensation, the supply water temperature is kept higher than the dew point temperature of the air inside the room. The full potential of the cooling power of a radiant cooling panel is limited. Therefore, this article is on maximizing the cooling capacity of a radiant cooling panel, in terms of flow configuration. Radiant cooling panels (RCP) with different chilled water pipe configurations are designed and compared, side by side with the conventional serpentine flow configuration. The cooling performance of the radiant cooling panels is evaluated by using computational fluid dynamics (CFD) with Ansys Fluent software (Ansys 2020 R2, PA, USA). Under similar flow and operating conditions, the common serpentine flow configuration exhibits the least effective cooling performance, with the highest pressure drop across the pipe. It is concluded that the proposed designs have the potential of improving the overall efficiency of RCP in terms of temperature distribution, cooling capacity, and pressure drop.
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15

Drojetzki, Lawrence, and Janusz Wojtkowiak. "Ceiling mounted radiant panels – calculations of heat output in heating and cooling application." E3S Web of Conferences 44 (2018): 00035. http://dx.doi.org/10.1051/e3sconf/20184400035.

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This paper describes calculations of heat exchange between a radiant heating and cooling ceiling panel and the surrounding space. The calculations were created on the basis of empirical equations published in literature and experimental research of radiant ceiling panels carried out at the Institute of Environmental Engineering of the Poznan University of Technology. Changes in heating or cooling output vs. air and panel surface temperature difference were investigated. Based on the calculation results, the influence of the colour, gloss and shape of the panels surface on the heating or cooling capacity was indicated. Performed calculations show that the proportion of radiation in the whole heat exchange for the matte black ceiling panel reach 50% for cooling and 75% for heating mode for the considered temperatures. Comparing two rectangular, square and circular panels with the same area, it has been shown that the shape of the surface affects the heat exchange due to the difference in convectional flows in the boundary layers for different cases. Possible explanations of the discrepancies between the theoretical model and experimental results were presented.
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16

Yin, Bao Quan, Yi Ping Wang, Li Zhu, and Yong Cui. "Solar Heating and Nocturnal Cooling System Integrated in Refurbished Buildings." Applied Mechanics and Materials 361-363 (August 2013): 257–62. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.257.

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Green energy system for the old building retrofitting for energy efficiency upgrade was proposed in this paper, which was composed by solar radiant panels, energy storage, multi-source heat pump and low temperature difference energy supplier. This building energy system can make efficient use of solar energy, sky radiation and natural energy, through the radiant panel installed as the building envelop or on the roof. Two types of the proposed energy system were applied for building refurbishing and their performances were comprehensively studied. It is shown that the building energy consumption annually is less than 30kWh/m2 and the indoor temperature is over 18°C in winter and under 26°C in summer, fully meeting the comfort temperature requirements.
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17

Kilkis, Í. B., S. S. Sager, and M. Uludag. "A simplified model for radiant heating and cooling panels." Simulation Practice and Theory 2, no. 2 (November 1994): 61–76. http://dx.doi.org/10.1016/0928-4869(94)90014-0.

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18

Mičko, Pavol, Andrej Kapjor, Dávid Hečko, and Marián Pafčuga. "Thermal Comfort Measurement for Wet Floor Cooling System." Advances in Thermal Processes and Energy Transformation 2, no. 3 (2019): 48–51. http://dx.doi.org/10.54570/atpet2019/02/03/0048.

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The trend of constant increase in energy prices can be observed especially on the increased demands on the thermal insulation properties of building structures of buildings. According to European Directive 2010/31 / EU, since 2019 only buildings that meet the energy standards of near zero buildings have to be designed. In practice, the design of the building takes into account, in particular, the shape of the building, its cladding, but also the method and technology for heating, cooling and hot water production. In the case of a family house is considered a specific annual consumption of heat for heating up to 20 kW.h.m-2 floor area. A popular way to achieve low heat consumption is to select an efficient heat source - a heat pump. It is best to combine a heat pump with a heating system with a low temperature gradient. The combination of heat pump and radiant floor heating is very popular. Modern heat pumps also come with the possibility of reversible operation and serve as a source of cold. The following article will therefore address floor radiant cooling and its effect on thermal comfort.
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19

Arghand, Taha, Jan-Olof Dalenbäck, Anders Trüschel, and Saqib Javed. "Some aspects of controlling radiant and convective cooling systems." E3S Web of Conferences 111 (2019): 05008. http://dx.doi.org/10.1051/e3sconf/201911105008.

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Designing appropriate control systems for radiant heating and cooling terminals entails an understanding of their dynamic behaviour. This study experimentally investigates the dynamic response of a room with convective and radiant cooling systems. The experiments were performed in a 12.6 m2 large test room outfitted as a single-office room. The main cooling system was radiant ceiling panels which covered 70% of the ceiling area. The thermal performance of the radiant system was compared to that of a fan-coil unit (FCU). The results from the step response test showed that the time constant of the room for the radiant system was shorter than for the convective one, indicating faster changes in room temperature by the radiant system. Furthermore, controlling the FCU with similar control system tuned for ceiling panels increased the hysteresis gap in the room air temperature from 0.4 K to 0.8 K. This indicates that control systems for low-mass radiant systems and convective systems might be applied to each other, but on-site tuning is required to omit the offset (persistent error). In this study, controlling room temperature with ceiling panels did not benefit from using an operative temperature sensor to provide feedback signal to the control system. However, the pump energy use was moderately decreased by 14%.
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20

Li, Qi Fen, Tao Li, Wei Dong Sun, Zhi Tian Zhou, Cui Cui Pan, and Li Feng Zhao. "Installation Design and Energy Conservation Analysis of Floor Radiant Cooling/Heating System with Solar Energy." Advanced Materials Research 594-597 (November 2012): 2146–53. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.2146.

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How to reduce the energy consumption of air conditioning, to use new energy such as solar appropriately, and to achieve energy savings, are the problems must be treated in HVAC industry. Because of the high energy consumption of traditional air-conditioning and the need for reduction of emission, an air conditioning system (utilizing solar dehumidifying applied to heating/cooling radiant floor) is designed and installed in this paper. At the same time, as an example, the energy saving potential of system is analyzed. This type of heating/cooling radiant floor system is worth promoted if solve the dehumidification properly. By separating to deal with heat and moisture can reduce the energy-cost of traditional air-conditioning, and to achieve purposes of primary energy saving.
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21

Shin, Dae-Uk. "Simulation Modeling of Simultaneous Heating and Cooling System with Thermal Storage Tanks using Radiant Heating and Cooling." Journal of the Korean Solar Energy Society 41, no. 4 (August 1, 2021): 13–25. http://dx.doi.org/10.7836/kses.2021.41.4.013.

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22

Nemethova, Ema, Werner Stutterecker, and Thomas Schoberer. "Thermal Comfort and Energy Consumption Using Different Radiant Heating/Cooling Systems in a Modern Office Building." Slovak Journal of Civil Engineering 25, no. 2 (June 27, 2017): 33–38. http://dx.doi.org/10.1515/sjce-2017-0010.

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Abstract The aim of the study is to evaluate the potential of enhancing thermal comfort and energy consumption created by three different radiant systems in the newly-built Energetikum office building. A representative office, Simulation room 1/1, was selected from 6 areas equipped with portable sensor groups for the indoor environment monitoring. The presented data obtained from 3 reference weeks; the heating, transition and cooling periods indicate overheating, particularly during the heating and transition period. The values of the indoor air temperature during the heating and transition period could not meet the normative criteria according to standard EN 15251:2007 (cat. II.) for 15-30% of the time intervals evaluated. Consequently, a simulation model of the selected office was created and points to the possibilities of improving the control system, which can lead to an elimination of the problem with overheating. Three different radiant systems - floor heating/ cooling, a thermally active ceiling, and a near-surface thermally active ceiling were implemented in the model. A comparison of their effects on thermal comfort and energy consumption is presented in the paper.
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23

Budiaková, Mária. "Natural Ventilation and Forced Warm Air Ventilation in Offices." Advanced Materials Research 899 (February 2014): 256–59. http://dx.doi.org/10.4028/www.scientific.net/amr.899.256.

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The paper is oriented on the natural ventilation and forced warm air ventilation systems in offices. The basic element of natural ventilation system in office building is double skin facade. The natural air circulation is undertaken by the right shaping of vertical shafts for exhaust air. Furthermore, the intelligent double skin facade in transitional period contributes to the heating and in summer to natural cooling of offices. Therefore, the forced warm air ventilation, which is provides heating of offices, can operate in saving mode and can be supplemented by radiant floor heating. By the effort to approach to zero energy balance, it is important to undertake thermal comfort. Therefore, I did experimental laboratory measurements for forced warm air ventilation and I also did it because of comparison for radiant floor heating. In this paper, I will present scientific analysis and the outputs from my own measurements. In the conclusion of this paper on the basis of outputs of experimental measurements I will define the principles for designing forced warm air ventilation and radiant floor heating in offices.
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24

Khovalyg, D., A. Mudry, M. Pugin, and T. Keller. "Towards multifunctional building elements: thermal activation of a composite interior GFRP slab." Journal of Physics: Conference Series 2069, no. 1 (November 1, 2021): 012125. http://dx.doi.org/10.1088/1742-6596/2069/1/012125.

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Abstract Modular multifunctional building elements can overcome major disadvantages of the traditional sequential design and become prospective design solutions for sustainable construction. Thus, this work explores lightweight glass fiber-reinforced polymer (GFRP) profiles capabilities as multifunctional load-bearing slab modules in buildings. By adding water channels in a cellular structure of pultruded GFRP elements, hydronic radiant thermal conditioning of the indoor space can be enabled. Additionally, the water channels can protect critical slabs in case of a fire. A preliminary design of a multifunctional GFRP slab is performed for an office case study building by modifying a commercial slab profile with triangular channels. The thermal design load of the slab unit is determined using Rhino 6, and heat conduction and convective heat transfer for ceiling cooling and floor heating/cooling cases are investigated using ANSYS Fluent. The results show that a commercial GFRP profile can be modified to accommodate water channels and provide adequate heating and cooling at the upper or lower face. In addition, Serviceability Limit State is verified and required water flow adjustment in case of a fire outbreak scenario is discussed. Thus, the GFRP radiant slab has the potential as a pre-fabricated alternative for traditional embedded radiant systems.
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25

Kalús, Daniel, Jozef Gašparík, Peter Janík, Matej Kubica, and Patrik Šťastný. "Innovative Building Technology Implemented into Facades with Active Thermal Protection." Sustainability 13, no. 8 (April 15, 2021): 4438. http://dx.doi.org/10.3390/su13084438.

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The article focuses on the description of an innovative solution and application of active thermal protection of buildings using thermal insulation panels with active regulation of heat transfer in the form of a contact insulation system. The thermal insulation panels are part of a prefabricated lightweight outer shell, which together with the low-temperature heating and high-temperature cooling system creates an indoor environment. The energy source is usually renewable energy sources or technological waste heat. Research and development of an innovative facade system with active thermal protection is in the phase of computer simulations and preparation of laboratory measurements of thermal insulation panels with various combinations of energy functions. In the article we present theoretical assumptions, calculation procedure and parametric study of three basic design solutions of combined energy wall systems in the function of low-temperature radiant heating and high-temperature radiant cooling.
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26

Cai, Wei, Zhao Hui Wu, and Jun Ming Li. "Effects of Exterior Window on Temperature Distribution and Thermal Comfort of Commercial Buildings with Radiant Floor Heating System." Applied Mechanics and Materials 55-57 (May 2011): 219–23. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.219.

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The purpose of this study is to investigate the effect of boundary conditions on the temperature distribution and thermal comfort of a radiant floor heating system and their practical application to commercial buildings. Indoor thermal environment, along with human response, was studied by means of CFD. The three-dimensional temperature distribution was numerically simulated with the zero-equation turbulent model. And two typical operating models, which there is and there is no windows in the room were analyzed in detail. The results show that the radiant floor heating system can meet the demand of comfortable degree, and that the temperature field is enormously influenced by boundary conditions. It is necessary to install curtains to decrease the radiant heat transfer of the cooling glass surface and other control methods to ensure the room to be a thermal comfortable environment.
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27

Kilkis, Birol. "Exergy metrication of radiant panel heating and cooling with heat pumps." Energy Conversion and Management 63 (November 2012): 218–24. http://dx.doi.org/10.1016/j.enconman.2012.01.043.

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28

Li, Rongling, Togo Yoshidomi, Ryozo Ooka, and Bjarne W. Olesen. "Field evaluation of performance of radiant heating/cooling ceiling panel system." Energy and Buildings 86 (January 2015): 58–65. http://dx.doi.org/10.1016/j.enbuild.2014.09.070.

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29

Lim, Jae-Han, Bo-Kyoung Koo, Sung-Im Kim, and Seung-Yeong Song. "Evaluation of Heating and Cooling Thermal Output Characteristics of Prefabricated Steel Wall Panel System for Radiant Heating and Cooling." Journal of the Korean Solar Energy Society 33, no. 2 (April 30, 2013): 70–77. http://dx.doi.org/10.7836/kses.2013.33.2.070.

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30

Wang, Xiaolong, Tian Mu, Lili Zhang, Wenke Zhang, and Linhua Zhang. "A Simplified Thermal Comfort Calculation Method of Radiant Floor Cooling Technology for Office Buildings in Northern China." Buildings 12, no. 4 (April 13, 2022): 483. http://dx.doi.org/10.3390/buildings12040483.

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The increasing application of floor heating technology promotes the development of floor radiant cooling technology (abbreviated as FRC technology). Many office buildings in northern China try to use FRC technology to cool in summer, but thermal comfort is the key problem restricting the promotion of this technology. The thermal comfort problems of an office room with floor radiant cooling were studied in this paper by the methods of numerical simulation, control variable, and data fitting, and the experimental results were verified in multiple ways. It was found that, for an office room using floor radiant cooling, the effect of the floor surface temperature on thermal comfort was about 16%, while the effect of indoor air temperature was about 84%, and relative humidity had little effect on thermal comfort. A simplified thermal comfort calculation model was proposed, which could be used as an indicator to adjust the floor surface and indoor air temperature, or could be used to calculate the PMV-PPD value. The findings have guiding significance for the design and control of FRC technology.
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31

Fraser, Sharon P. "Variability of heating and cooling rates during radiant heating in a scincid lizard, Egernia cunninghami." Comparative Biochemistry and Physiology Part A: Physiology 80, no. 3 (January 1985): 281–86. http://dx.doi.org/10.1016/0300-9629(85)90037-4.

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32

Mičko, Pavol, Andrej Kapjor, Šimon Kubas, and Martin Vantúch. "Experimental Verification of the Performance of the Floor Cooling System in Comparison with the Ceiling Cooling System While Maintaining Thermal Comfort in the Environment." MATEC Web of Conferences 328 (2020): 02004. http://dx.doi.org/10.1051/matecconf/202032802004.

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The trend of constantly increasing energy prices can be observed especially in the increased demands on the thermal insulation properties of building structures. The possibilities of reducing the energy intensity of residential buildings also include the right choice of technology for heating, cooling and hot water preparation. Different cooling systems have different proportions of convection and radiant components. This results in a variety of temperature profiles, and thus also directly affect the quality of the environment in terms of thermal comfort. For efficient heating, it is therefore best to choose a cooling system with a minimum temperature gradient in both the horizontal and vertical directions. At the same time, however, the investment costs for the cooling system must be considered. From this point of view, it seems to be most advantageous to use one system for both heating and cooling. From the point of view of comfort, the most suitable choice of cooling system is ceiling cooling. On the contrary, this system is less suitable for heating compared to the floor system. Therefore, if you are considering the design of a system that will be the greater part of the operation for heating the building and during the summer months will be used to increase thermal comfort by cooling in buildings with lower heat loads [1].
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33

Liu, Weiliang, Changliang Liu, Yongjun Lin, Kang Bai, Liangyu Ma, and Wenying Chen. "Multi-Objective Optimal Scheduling Method for a Grid-Connected Redundant Residential Microgrid." Processes 7, no. 5 (May 19, 2019): 296. http://dx.doi.org/10.3390/pr7050296.

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Optimal scheduling of a redundant residential microgrid (RR-microgrid) could yield economical savings and reduce the emission of pollutants while ensuring the comfort level of users. This paper proposes a novel multi-objective optimal scheduling method for a grid-connected RR-microgrid in which the heating/cooling system of the RR-microgrid is treated as a virtual energy storage system (VESS). An optimization model for grid-connected RR-microgrid scheduling is established based on mixed-integer nonlinear programming (MINLP), which takes the operating cost (OC), thermal comfort level (TCL), and pollution emission (PE) as the optimization objectives. The non-dominate sorting genetic algorithm II (NSGA-II) is employed to search the Pareto front and the best scheduling scheme is determined by the analytic hierarchy process (AHP) method. In a case study, two kinds of heating/cooling systems, the radiant floor heating/cooling system (RFHCS) and the convection heating/cooling system (CHCS) are investigated for the RR-microgrid. respectively, and the feasibility and validity of the scheduling method are ascertained.
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34

Kim, Minseong, Yong-Kwon Kang, Jaewon Joung, and Jae-Weon Jeong. "Cooling Performance Prediction for Hydraulic Thermoelectric Radiant Cooling Panels with Experimental Validation." Sustainability 14, no. 23 (December 5, 2022): 16214. http://dx.doi.org/10.3390/su142316214.

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Thermoelectric technology has been developed as a substitute for existing refrigerants in heating, ventilation, and air-conditioning system applications for building decarbonization. A hydraulic thermoelectric radiant cooling panel (hTERCP) operated based on the Peltier effect can alternate a conventional cooling system using a chiller with refrigerators. This study aimed to develop a cooling performance prediction model for a hTERCP-integrated free cooling system according to the desirable range of five design factors. A mockup model of the hTERCP was constructed and tested in an environmental chamber to verify the proposed simulation model. The simulation and the experimental analysis confirmed that the heat rejection performance of the thermoelectric module (TEM) significantly affects the cooling performance of the hTERCP. The cooling water temperature was the primary design factor for releasing heat from the hot side of the TEM and significantly influenced the cooling performance of the hTERCP. A parametric analysis of the five design factors was conducted to investigate a method for improving the coefficient of performance (COP) of the hTERCP. The cooling water temperature affected the COP by 38.6–45.7%, and the heat exchange area of the cooling surface greatly influenced the cooling performance by 41.4%. The cooling water flow rate, heat exchange effectiveness of the water block, and heat resistance of the hot side were confirmed to have relatively little influence as 9.7–10.2%, 11.9–24.8%, and 0.7–11.1%, respectively.
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35

Werner-Juszczuk, Anna Justyna. "Analysis of the Use of Radiant Floor Heating as a Cooling System." Proceedings 16, no. 1 (June 20, 2019): 23. http://dx.doi.org/10.3390/proceedings2019016023.

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The aim of this paper was to analyze the operational parameters of a radiant floor heating system working as a cooling system, in order to determine the value of possible heat flux and the floor surface temperature that can be obtain on the floor surface. The influence of variable air and water temperatures, pipe spacing, and thermal resistance of floor covering on surface heat flux and temperature was analyzed. The admissible values of water temperature that assure thermal comfort according to standard ISO 11855 were determined for the analyzed variables.
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36

González-Cruz, Eduardo M., and Eduardo L. Krüger. "Experimental study on a low energy radiant-capacitive heating and cooling system." Energy and Buildings 255 (January 2022): 111674. http://dx.doi.org/10.1016/j.enbuild.2021.111674.

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37

Hirayama, Yoshihisa, and Shoko Yamamura. "C123 Radiant Cooling and Heating System Developed for Highly Humid Climatic Regions." Proceedings of the Thermal Engineering Conference 2009 (2009): 73–74. http://dx.doi.org/10.1299/jsmeted.2009.73.

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38

Ekren, O., A. Hepbasli, and E. Biyik. "Radiant Heating-cooling Performance Assessment in a Shopping Center in Sopron, Hungary." Energy Procedia 107 (February 2017): 212–16. http://dx.doi.org/10.1016/j.egypro.2016.12.175.

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39

Zhang, Lun, Xiao-Hua Liu, and Yi Jiang. "Simplified calculation for cooling/heating capacity, surface temperature distribution of radiant floor." Energy and Buildings 55 (December 2012): 397–404. http://dx.doi.org/10.1016/j.enbuild.2012.08.026.

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40

S. Kulkarni, Shubham, Suraj S. Haswal, Sudhanshu S. Rankhambe, Bharartesh A. Ambade, and A. S. N. Husainy. "A Glance On Radiant Cooling Technology For Heating And Cooling For Residential And Commercial Building Application." Journal of Alternative and Renewable Energy Sources 6, no. 3 (December 31, 2020): 41–47. http://dx.doi.org/10.46610/joares.2020.v06i03.005.

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41

S. Kulkarni, Shubham, Suraj S. Haswal, Sudhanshu S. Rankhambe, Bharartesh A. Ambade, and A. S. N. Husainy. "A Glance On Radiant Cooling Technology For Heating And Cooling For Residential And Commercial Building Application." Journal of Alternative and Renewable Energy Sources 6, no. 3 (December 31, 2020): 41–47. http://dx.doi.org/10.46610/joares.2020.v06i03.005.

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42

Domanický, J., Z. Vranayová, and F. Vranay. "Sustainable concept of energy management of buildings as an effective tool for green building." IOP Conference Series: Materials Science and Engineering 1209, no. 1 (December 1, 2021): 012068. http://dx.doi.org/10.1088/1757-899x/1209/1/012068.

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Abstract Nowadays, due to high external temperatures, the topic of cooling is very actual. However, cooling buildings is energy intensive. Therefore, it is necessary to focus on more than one method of cooling. We can say that cooling can be provided in 2 ways. By building services and by architectural design. For existing buildings, we cannot change the shape and orientation of the building. But we can change the composition of structures. Green architecture is often mentioned in this area. Therefore, the aim of this research is to interconnect these two areas and determine the influence of vegetative roof on the radiant cooling and heating systems. This connection shows us how the design will affect the HVAC systems.
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43

Fang, Wen Bo. "Performance Analysis of Solar Evacuated Tube Collector." Advanced Materials Research 712-715 (June 2013): 1605–8. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1605.

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The high temperature operation of Evacuated Tube Collectors (ETC) and their very low radiant heat losses make them ideal for solar water heating, solar space heating, desiccant air conditioning, thermal driven cooling and industrial process heating applications. The work temperature of common ETC can reach 100~ 250°C. The vacuum tube envelope minimizes heat loss and ensures high collector durability and steady performance. This paper investigates different types of solar thermal collectors and compared them so that the result which the heat loss of ETC is least is obtained. The thermal analysis and performance of ETC are investigated as well.
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44

Dawe, Megan, Caroline Karmann, Stefano Schiavon, and Fred Bauman. "Field evaluation of thermal and acoustical comfort in eight North-American buildings using embedded radiant systems." PLOS ONE 16, no. 10 (October 26, 2021): e0258888. http://dx.doi.org/10.1371/journal.pone.0258888.

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We performed a post-occupancy assessment based on 500 occupant surveys in eight buildings using embedded radiant heating and cooling systems. This study follows-up on a quantitative assessment of 60 office buildings that found radiant and all-air buildings have comparable temperature and acoustic satisfaction with a tendency for increased temperature satisfaction in radiant buildings. Our objective was to investigate reasons of comfort and discomfort in the radiant buildings, and to relate these to building characteristics and operations strategies. The primary sources of thermal discomfort are lack of control over the thermal environment (both temperature and air movement) and slow system response, both of which were seen to be alleviated with fast-response adaptive opportunities such as operable windows and personal fans. There was no optimal radiant design or operation that maximized thermal comfort, and building operators were pleased with reduced repair and maintenance associated with radiant systems compared to all-air systems. Occupants reported low satisfaction with acoustics. This was primarily due to sound privacy issues in open-plan offices which may be exacerbated by highly reflective surfaces common in radiant spaces.
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45

Ren, Jing, Meng Su, Xintian Zhao, Jiying Liu, and Shoujie Song. "Experimental study on the dynamic thermal response of a radiant floor system in an office building." E3S Web of Conferences 246 (2021): 10003. http://dx.doi.org/10.1051/e3sconf/202124610003.

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The dynamic thermal performance of radiant terminal plays an important role in the design and control of radiant cooling system, which is shown as the dynamic thermal response of radiant floor system (RFS) under imposed control. In this paper, the field measurement method was used to study the dynamic thermal response of RFS. The RFS was activated in summer and the supply water temperature was regulated in winter to make dynamic change of thermal performance. The floor surface temperature was selected as the characteristic parameter to describe the dynamic heat transfer performance of the system, and response time τ95 and time constant τ63 were used to quantify the dynamic thermal response. The maximum τ95 was 13.5 h and τ95/τ63 was greater than or equal to 2 in the cooling mode, while τ95 and τ63 were both less than 10 h and τ95/τ63 was 1.6 in the heating mode. As a result, there was no significant lessening of temperature change rate, and the thermal response of RFS was faster under intermittent control of supply water temperature in winter. Therefore, the study aims at providing reference for making intermittent control strategy by using the dynamic thermal performance of radiant system.
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46

Luo, Xuan, Tianzhen Hong, and Yu-Hang Tang. "Modeling Thermal Interactions between Buildings in an Urban Context." Energies 13, no. 9 (May 9, 2020): 2382. http://dx.doi.org/10.3390/en13092382.

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Thermal interactions through longwave radiation exchange between buildings, especially in a dense urban environment, can strongly influence a building’s energy use and environmental impact. However, these interactions are either neglected or oversimplified in urban building energy modeling. We developed a new feature in EnergyPlus to explicitly consider this term in the surface heat balance calculations and developed an algorithm to batch calculating the surrounding surfaces’ view factors using a ray-tracing technique. We conducted a case study with a district in the Chicago downtown area to evaluate the longwave radiant heat exchange effects between urban buildings. Results show that the impact of the longwave radiant effects on annual energy use ranges from 0.1% to 3.3% increase for cooling and 0.3% to 3.6% decrease for heating, varying among individual buildings. At the district level, the total energy demand increases by 1.39% for cooling and decreases 0.45% for heating. We also observe the longwave radiation can increase the exterior surface temperature by up to 10 °C for certain exterior surfaces. These findings justify a detailed and accurate way to consider the thermal interactions between buildings in an urban context to inform urban planning and design.
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47

Shishkin, Alexey, Polina Meshalova, Yuriy Yavorovsky, and Ekaterina Zhigulina. "Development of a digital twin of the heat network in various software." Energy Systems 7, no. 2 (December 20, 2022): 29–40. http://dx.doi.org/10.34031/es.2022.2.004.

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The purpose of this work is development of the heat transfer calculation method of a water low-temperature ceiling capillary heating system for heating rectangular rooms. Recently, such systems have become widespread due to their advantages over traditional heating devices: the use of a coolant with a low temperature potential, high heating speed rate of the internal air, low temperature gradient in the height of the room, absence of noticeable air masses movement and dust flows, ability to work in cooling mode. However, such systems are still incompletely studied, and constructive calculations or calculations of thermal and hydraulic modes are carried out according to formulas obtained empirically, thus, calculations do not always have high accuracy. The paper proposes a heat transfer process calculation method from the considered low-temperature heating system, which allows determination of the heat flow value with high accuracy. It`s revealed that in the considered configuration of the system location (on the ceiling), a significant proportion of heat transfer is infrared radiation, and the convective component is very small. Therefore, it was very important to accurately describe the radiant heat exchange by mathematical equations. The calculation of the radiant component of heat transfer was carried out with the theory of radiation view factors. Experimental test of the studying object was carried out to find the missing values, as well as to verify the results obtained using the proposed calculation method. The calculation results had a slight deviation from the results obtained experimentally (the error was 6 %).
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48

Laouadi, Abdelaziz. "Development of a radiant heating and cooling model for building energy simulation software." Building and Environment 39, no. 4 (April 2004): 421–31. http://dx.doi.org/10.1016/j.buildenv.2003.09.016.

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49

Strand, R. K., and K. T. Baumgartner. "Modeling radiant heating and cooling systems: integration with a whole-building simulation program." Energy and Buildings 37, no. 4 (April 2005): 389–97. http://dx.doi.org/10.1016/j.enbuild.2004.07.009.

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50

KUSAMA, Yuka, and Yuji ISHIDOYA. "A STUDY ON A RADIANT HEATING-COOLING SYSTEM WITH A PCM PLASTERED WALL." Journal of Environmental Engineering (Transactions of AIJ) 81, no. 730 (2016): 1085–93. http://dx.doi.org/10.3130/aije.81.1085.

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