Academic literature on the topic 'Air conditioning in large buildings'

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Journal articles on the topic "Air conditioning in large buildings"

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Pan, Wen Yan, Liu Yang, and Zhu Hui Zhang. "Energy Consumption and Analysis of Air-Conditioning System of Large-Scale Public Buildings in Xi'an." Applied Mechanics and Materials 99-100 (September 2011): 388–92. http://dx.doi.org/10.4028/www.scientific.net/amm.99-100.388.

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As the main consumption equipment, the air-conditioning system of large-sized public buildings in Xi'an consumes 30%~¬60% of the total energy. Combining with the survey data and related norms, the paper analyses the energy consumption from the following aspects: basic situation of building, index of building energy consumption, ratio of energy consumption of air-conditioning system, load of air-conditioning and indoor environment. Thus, it will give a rational and scientific understanding to energy-efficiency of air-conditioning system of large-scale public buildings in Xi'an for the purpose of providing an efficient assistance to improving the energy consumption of air-conditioning system.
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Meng, Xi, Yanna Gao, Chaoping Hou, and Fen Yuan. "Questionnaire survey on the summer air-conditioning use behaviour of occupants in residences and office buildings of China." Indoor and Built Environment 28, no. 5 (August 16, 2018): 711–24. http://dx.doi.org/10.1177/1420326x18793699.

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Although occupants play a critical role in a building’s energy consumption, their air-conditioning use behaviour is often ignored, with it usually approximated as being a continuous operation. This in turn leads to a large difference between the actual and expected levels of energy consumption, raising the need to study air-conditioning use behaviour of building occupants. In this survey, 3083 questionnaires dealing with air-conditioning use behaviour were received from 34 cities distributed throughout China. The results show occupancy rates of 20% to 75% in residences and around 80% in office buildings during the period of 8:00–18:00. Air-conditioning use behaviour only meets a liveable requirement in residences and reaches a comfortable level in office buildings. This leads to daily air-conditioning operation times of between 0.85 and 4.31 hours in residences, and between 1.67 and 7.22 hours in office buildings, indicating most air-conditioning systems do not run continuously but intermittently, and that the assumption of continuous operation is far removed from reality. Based on these survey results, the large differences between the realistic (intermittent) and assumed (continuous) use of air-conditioning are employed to reveal the weaknesses in the present standards and to examine the optimization of building energy efficiency.
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Cai, Wei, Ke Jian Cai, and Zhao Hui Wu. "Dominant Factors of Central Air Conditioning System Zoning and Thermal Comfort for Large-Scale Public Buildings in China." Advanced Materials Research 171-172 (December 2010): 159–62. http://dx.doi.org/10.4028/www.scientific.net/amr.171-172.159.

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Large-scale public buildings have high energy density, which take big part of the gross energy consumption in buildings in China. It is still in attempting stage about the strategy of energy conservation in air conditioning systems. The objective of this study is to investigate that how to appropriately divide central air conditioning system zoning by using simulation software to calculate the basis dynamic temperature and load in typical large-scale public buildings. Effects of weather conditions, building envelope conditions and building structure on large-scale public building energy consumption were analyzed in this simulation. The results show that the building load is the fundamental factor involved in air conditioning system zoning. Surplus heat recovery in inner zone is also recommended to maintain inner zone comfort and energy conservation. This work provides the theoretical and technological basis for study on central air conditioning system zoning and thermal comfort for large-scale public building.
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Zhang, Guang Ming, Xue Shen, and Gui Zhong Tang. "Energy Consumption Simulation of the Air Conditioning System in Large-Scale Buildings." Advanced Materials Research 724-725 (August 2013): 1506–9. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.1506.

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The working environment of air conditioning system in large-scale building is very complex, and there is no significant linear relationship between factors affecting energy consumption and energy demand of air conditioning system. This study adopts a nonlinear regression model: ANN (artificial neural network) model as energy model of air conditioning system. Take outdoor temperature, categorical day-of-week variable, equipment efficiency and terminal load as input, energy demand as output. Use energy consumption data in 2011 for network training, and energy consumption data in 2012 to verify the reliability of model. Based on energy analysis, the operation condition and the characteristics of energy consumption of air conditioning system for large-scale buildings in Nanjing could be precisely represented.
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Bravo-Hidalgo, Debrayan. "Night air conditioning of buildings by external air ventilation." Revista Facultad de Ingeniería 27, no. 48 (May 5, 2018): 35–47. http://dx.doi.org/10.19053/01211129.v27.n48.2018.8462.

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Buildings contain the environment in which almost all human activities take place, and therefore, nowadays, they represent a great sink of energy. Establishing thermal comfort conditions within these buildings is responsible for a large portion of their energy demand. This paper aims at providing a theoretical framework of the performance and the trends in research and implementation of night air conditioning by outside air ventilation. The bibliographic search was conducted in the academic directory Scopus, and the information extracted was processed in the VOSviewer software, through which text mining, map of terms and networks of investigative action were carried out. The literature showed that direct ventilation has a more significant cooling potential in regions characterized by a high difference between day and night air temperatures. The effectiveness of night cooling and the reliable prediction of thermal behavior are strongly related to the model adopted for the convection algorithm. A reliable prediction of heat transfer by convection requires an approach based on computational simulations of fluid dynamics, which are much more demanding in terms of computational power, compared to simulations of the variation of energy flows as a function of time. Most studies showed that the position of the thermal mass is not significant, while the amount of ventilation air is of great importance. In particular, the energy demand for cooling a building decreases sharply if the air flow rates increase.
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Alustath, Husam, Batoul Daou, Sherif Elgohary, Mohammad Kataw, Peiman Kianmehr, and Mason Marzbali. "A Potential Solution for Solid Particulate Matter Reduction in Large Indoor Spaces." IOP Conference Series: Earth and Environmental Science 1050, no. 1 (July 1, 2022): 012026. http://dx.doi.org/10.1088/1755-1315/1050/1/012026.

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Abstract Air filtration is an essential process in indoor air conditioning and its physical removal of particulate matter is critical for enhancing indoor air quality, especially in arid regions including United Arab Emirates. In such regions, meeting indoor air quality standard is challenging during sporadic sandstorms when common air conditioning systems are unable to maintain indoor air quality properly. Such inability occurs either due to air infiltration through building’s fenestrations exposing indoor air to excessive particulate matter or the failure of inlet air filters after rapid clogging and high pressure drops. Such failure may be observed frequently in buildings with frequent openings such as public buildings and warehouses. Aerosolized pathogenic microorganisms, e.g., SARS-CoV-2 virus, can be modelled through air particle matter and be removed to a certain degree. In addition, the recent global pandemic raised more awareness towards the necessity of particulate matter filtration in indoor environment. Employing independent air filtration units might be a great solution for intermittent or emergency situations, when primary or additional air filtration process is required to attain proper indoor air quality. The main objective of this paper is to attempt designing, manufacturing, and utilizing an easy to set portable filtration unit and to assist buildings’ existing air conditioning systems in airborne dust particle elimination. The unit is designed and manufactured with additional feature accommodating easy installation of commercially available filters for further performance studies. The unit was equipped with all necessary performance monitoring sensors to detect key parameters such as air velocity, pressure differential, temperature, humidity, and particulate matter before and after filtration. The results revealed interesting information associated with the performance of commercially available filters and the feasibility of such independent filtration units.
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Wang, Jin, Jing Jing Xin, You Tao Zhou, Xin Lin Li, and Shu Sheng Li. "Cold and Heat Source Energy-Saving Reconstruction for Central Air-Conditioning System in a Research and Development Center of Shanghai." Advanced Materials Research 204-210 (February 2011): 327–31. http://dx.doi.org/10.4028/www.scientific.net/amr.204-210.327.

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Central air-conditioning energy consumption accounts for a large proportion of the buildings. And cold and heat source energy consumption accounts for about two-thirds of central air-conditioning system. For a research and development center in Shanghai, because cold and heat source capacity largely surpasses the actual demand, we propose to combine with cold sources of the two buildings. We call it "two-in-one" reconstruction. When cooling load is small, we use cold source in one building to support the two buildings. After implementation, by return on investment analysis, the average electric energy-saving rate is 9.6%. Investment can be recovered within one year.
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Cui, Yan Qi, and Saffa Riffat. "Review of Latest Developments in Microporous Aerogel for Building Applications." Applied Mechanics and Materials 71-78 (July 2011): 1967–70. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.1967.

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Buildings are large consumers of energy in all countries. In regions with harsh climatic conditions, a substantial share of energy goes to heat and cool buildings. This heating and air-conditioning lost can be reduced through many means, such as the selection of the building thermal insulation materials. The proper use of thermal insulation material in buildings does not only contribute in reducing the annual energy cost but also helps in extending the periods of thermal comfort without reliance on mechanical heating and air-conditioning. Aerogel is one of the novel insulation these years, thermal conductivities of 0.04 W/mK less can be achieved using it. The paper is concerned with a review of Microporous Aerogel for building applications. And it also provides information about their performance.
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Strongin, A. S., and A. M. Zhivov. "Energy Efficient Air Curtains for Industrial Gates in Cold Climates." E3S Web of Conferences 246 (2021): 08005. http://dx.doi.org/10.1051/e3sconf/202124608005.

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In geographical areas with cold climates, large, massively constructed industrial and warehouse buildings and logistics complexes are large consumers of energy resources. The great height and large contained volumes of the premises, the presence of a significant number of doors, and building configurations that include many transport corridors all require the use of air-thermal curtains to increase the energy efficiency of the buildings’ heating, ventilating, and air-conditioning (HVAC) systems, which commonly produce several thousand kilowatts of thermal power. Optimization of air curtains can improve the microclimates of the premises, achieve savings in the initial construction costs, and also reduce energy consumption during operation by 10–20%.
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West, John B. "A strategy for oxygen conditioning at high altitude: comparison with air conditioning." Journal of Applied Physiology 119, no. 6 (September 15, 2015): 719–23. http://dx.doi.org/10.1152/japplphysiol.00421.2015.

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Large numbers of people live or work at high altitude, and many visit to trek or ski. The inevitable hypoxia impairs physical working capacity, and at higher altitudes there is also cognitive impairment. Twenty years ago oxygen enrichment of room air was introduced to reduce the hypoxia, and this is now used in dormitories, hotels, mines, and telescopes. However, recent advances in technology now allow large amounts of oxygen to be obtained from air or cryogenic oxygen sources. As a result it is now feasible to oxygenate large buildings and even institutions such as hospitals. An analogy can be drawn between air conditioning that has improved the living and working conditions of millions of people who live in hot climates and oxygen conditioning that can do the same at high altitude. Oxygen conditioning is similar to air conditioning except that instead of cooling the air, the oxygen concentration is raised, thus reducing the equivalent altitude. Oxygen conditioning on a large scale could transform living and working conditions at high altitude, where it could be valuable in homes, hospitals, schools, dormitories, company headquarters, banks, and legislative settings.
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Dissertations / Theses on the topic "Air conditioning in large buildings"

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Sutcliffe, Helen C. "Infiltration and air change studies in large single cell buildings." Thesis, Coventry University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303351.

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Martinovic, Zarko. "Design a PV – system for a large building." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-17539.

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This study presents the complete design of a photovoltaic system in commercial buildings. PV installation for Multiarena was primary used for internal consumption, rest of production will be sent according intentions in grid. Project presents theoretical demand calculations for building consumptions. According to the theoretical calculations numerical study has been provided by software Indoor Climate and Energy program. Detailed electric optimization strategy can be founded in project description, as well as the sizing of the photovoltaic installation and economic and financial issues related to it. Study presents several models for photovoltaic system and their economic analysis. Environmental issues can be founded at the end of the study.
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Van, Rensburg Johann Francois. "Developing ESCO procedures for large telecommunication facilities using novel simulation techniques / J.F. van Rensburg." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1693.

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Leung, Wai-yip. "Indoor air quality and heating, ventilation & air conditioning systems in office buildings /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18734315.

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Botha, C. P. "Simulation of a building heating, ventilating and air-conditioning system." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-07032006-113100/.

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Wills, D. J. "Predicting the capital cost of air conditioning installations in high rise commercial buildings." Thesis, [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12222045.

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Eftekhari, M. M. "Optimal operation of an air-conditioning plant." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234946.

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Leung, Wai-yip, and 梁偉業. "Indoor air quality and heating, ventilation & air conditioning systemsin office buildings." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31253787.

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Alanezi, Ahmad Qatnan. "Dynamic coupling of air culvert air conditioning hybrid cooling system in buildings." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=17832.

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Active and passive cooling methods have been the subject of much investigation. Nevertheless, there remains a significant opportunity to utilise the so-called "responsive building elements" and to arrange for cooperative deployment with downsized, conventional HVAC systems. The integration of an air culvert with an active cooling system along with associated control is the subject of this thesis. The issues studied within this thesis are as follows. The quantification of air culvert thermal efficacy. The elaboration of an integrated system design method that accounts for the transient interaction between the air culvert and the air conditioning systems. The requirement for hybrid system control when deployed within different climates. The ESP-r system was adopted within the present work. A ground temperature model was established for the hot/dry climate location selected and validated against measured soil temperature profiles. A culvert model was derived and verified empiricall y and by inter-model comparison. Results showed that the ESP-r model can robustly quantify the thermal performance of an air culvert. The culvert was then coupled to a residential villa situated in the hot/arid climate domain and its contribution explored. A constant air volume air-conditioning system was then linked to the culvert-building model and used to research approaches to the control of such a hybrid cooling system. A general control strategy was then devised corresponding to specific objectives and constraints. Results confirmed that the final control set-up can be implemented for a culvert/HVAC hybrid cooling system regardless of climate type, with cooling load matching in excess of 85% keeping indoor resultant temperatures within comfort threshold limits. The project conclusion is that a culvert may be deployed in a manner that allows significant down-sizing of conventional cooling plant, thereby achieving both capital and running costs savings without appreciable loss.
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Kuegler, Kurt W. "Heating, ventilation and air conditioning engineering and design /." Online version of thesis, 1990. http://hdl.handle.net/1850/10982.

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Books on the topic "Air conditioning in large buildings"

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Kunkle, Rick. The advantages of gas cooling in large commercial buildings: Comparison of baseload and peak shaving strategies. Arlington, Va. (1515 Wilson Blvd., Arlington 22209): The Association, 1987.

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Henning, Hans-Martin, ed. Solar-Assisted Air-Conditioning in Buildings. Vienna: Springer Vienna, 2007. http://dx.doi.org/10.1007/978-3-211-75266-1.

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Air conditioning principles and systems. 4th ed. Upper Saddle River, N.J: Prentice Hall, 2002.

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Air conditioning principles and systems. 3rd ed. Upper Saddle River, N.J: Prentice Hall, 1998.

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Canada. Energy, Mines and Resources Canada. Heating, ventilating and air conditioning. Ottawa, Ont: Energy, Mines and Resources Canada, 1985.

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Property Services Agency. Directorate of Mechanical and Electrical Engineering Services., ed. Air conditioning, air cooling and mechanical ventilation for buildings. 2nd ed. London: H.M.S.O., 1990.

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Great Britain. Defence Estate Organisation. Industrial Processes Group., ed. Air conditioning, air cooling and mechanical ventilation for buildings. London: Stationery Office, 1997.

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M, Santamouris, and Asimakopoulos D, eds. Passive cooling of buildings. London: James & James, 1996.

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1930-, Flynn John E., ed. Architectural interior systems: Lighting, acoustics, air conditioning. 3rd ed. New York: Van Nostrand Reinhold, 1992.

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Butler, D. J. G. Air as a rfrigerant in air conditioning systems in buildings. [London]: [CRC], 2000.

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Book chapters on the topic "Air conditioning in large buildings"

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Wang, Fei, Zhenhai Li, Xin Wang, Qidong Li, and Chen Huang. "Experimental Study on Particle Distribution under Stratified Air-conditioning in Large Space Building." In Environmental Science and Engineering, 1027–35. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9520-8_106.

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Wu, Guozhong, Kang Xue, Jing Wang, and Dong Li. "Analysis of Indoor Thermal Environment and Air-Conditioning Mode of Ventilation in Large Space Building." In Computer Science for Environmental Engineering and EcoInformatics, 467–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22691-5_82.

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Huang, Chen, Liang Qiao, Tianyu Bai, Haidong Wang, Zhijun Zou, and Liugen Lv. "Experimental Study on Thermal Environment and Stratified Air-Conditioning Load of Large-Space Building with Low-Sidewall Air Supply under Periodic Thermal Disturbance." In Environmental Science and Engineering, 553–62. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9520-8_58.

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Tymkow, Paul, Savvas Tassou, Maria Kolokotroni, and Hussam Jouhara. "Air conditioning systems." In Building Services Design for Energy-Efficient Buildings, 158–84. Second edition. | New York : Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.1201/9781351261166-8.

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Romey, Ingo, and Gisbert Markert. "Solar Air Conditioning for Buildings." In New and Renewable Technologies for Sustainable Development, 325–32. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0296-8_26.

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Huang, Chen, Ning Cai, and Li Shen. "Discussion on Indoor Design Parameters of Air-Conditioning in the Large Space Building with Considering Comfort and Energy Consumption Based on Nomograms." In Lecture Notes in Electrical Engineering, 185–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39584-0_21.

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Kirkpatrick, Allan T. "Cooling Loads in Buildings." In Introduction to Refrigeration and Air Conditioning Systems, 109–28. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-16776-8_6.

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Wang, Xiaohong, Pengfei Xu, Ming Liu, and Yanping Wang. "Air-Conditioning System in a Green Office Building." In Handbook of Energy Systems in Green Buildings, 1–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49088-4_10-1.

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Zhang, Tao, and Xiaohua Liu. "Independent Temperature and Humidity Control Air-Conditioning Systems." In Handbook of Energy Systems in Green Buildings, 1–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49088-4_22-1.

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Wang, Xiaohong, Pengfei Xu, Ming Liu, and Yanping Wang. "Air-Conditioning System in a Green Office Building." In Handbook of Energy Systems in Green Buildings, 1555–614. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-49120-1_10.

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Conference papers on the topic "Air conditioning in large buildings"

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Bing, Wei, Li Li, Yuefen Gao, and Xianliang Yang. "Energy Saving Potentials of All Cold Air Distribution System With Stratified Air Conditioning in Large Space Building." In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54111.

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So far the energy saving potentials in refrigeration and air conditioning systems are the focuses of researchers all over the world. The all cold air distribution systems are being widely used due to the advantages of saving building space, less energy consumption in some given conditions and less initial cost, mostly in the residential or office buildings. The stratified air conditioning technology is adopted mainly for large space buildings to reduce the system energy consumption, normally at conventional supply air temperature. In this paper, with an example of large space building, the energy consumptions of four all outdoor air systems are calculated and compared from the view of the total annual primary energy consumption. The detailed analysis shows that comparing the conventional all outdoor air system for the whole indoor space or that with stratified air conditioning technology, the all cold outdoor air system with stratified air conditioning has the energy saving potentials. It will be promoted in the future application of HVAC systems in large space buildings.
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Bing, Wei, Li Li, Jiang Lu, and Zhang Wei. "Indoor Environment Numerical Simulation of All Cold Air Distribution System With Stratified Air Conditioning." In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54112.

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At present all cold air distribution systems are being used widely due to their advantages of smaller ductwork, shorter floor-to-floor height and less energy consumption etc. They are mostly used in VAV (Variable Air Volume) systems or with the radiant panel systems in the office and residential buildings at the supply air dew point temperature of 6∼10°C, rarely used in large space buildings. The technology of stratified air conditioning is one of the energy saving technologies to large space buildings, which has been popularly used in the conventional air supply systems with the supply air dew point temperature of 11∼16°C. In this paper, the cold air distribution system and the stratified air conditioning technology in a large space building are combined to study. With the method of CFD, the indoor thermal environment of a large space workshop is simulated. The velocity and the temperature as well as the relative humidity fields under different air flow modes are presented, analyzed and compared. With the help of numerical simulation results, the optimal airflow mode is proposed, which show that the all cold air distribution with the stratified air conditioning is a good option for large space buildings. All these above will be good references to the application of cold air distribution system and the selection of the airflow mode in large space buildings.
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Wei, Bing, and Li Zhang. "Simulation of Indoor Air Flow Fields in Buildings With Large Interior Spaces With Stratified Air Conditioning and Perforated Side Wall Diffusers." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90361.

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The energy consumption of AC (air conditioning) systems in large buildings is normally higher than the energy consumption in smaller buildings, and its indoor air flow field is also more complex than that in small building. To study the air flow mode and the indoor air flow fields in large spaces is of great significance to the energy conservation of AC systems and thermal comfort of the occupants. This paper presents an example using a large building that uses stratified air conditioning delivered through the linear slot sidewall diffusers and perforated sidewall diffusers. Using CFD simulation methods, three air flow field situations were simulated: (1) total air volume supplied from linear slot diffusers located in the middle of a side wall, (2) 50% flow through the linear slot diffusers the remainder supplied through the perforated sidewall diffusers, (3) 30% of the volume supplied with linear slot diffusers, 70% supplied through the perforated sidewall diffusers. The simulated results show that the third airflow mode is the optimal one for the three modes, which is good for achieving energy conservation and a comfortable building thermal environment in buildings with large spacial areas.
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Feierl, Lukas, Hannes Poier, and Christian Holter. "Measurement Results and Operating Experience of Large-Scale Solar Air Conditioning Plants." In ISES EuroSun 2018 Conference – 12th International Conference on Solar Energy for Buildings and Industry. Freiburg, Germany: International Solar Energy Society, 2018. http://dx.doi.org/10.18086/eurosun2018.04.14.

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Chan, Korey, and Saeid Bashash. "Modeling and Energy Cost Optimization of Air Conditioning Loads in Smart Grid Environments." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5284.

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Electricity for heating, ventilation, and air condition (HVAC) machines takes up a large percentage of energy consumption in the buildings and thus in turn, a large portion of the energy monetary cost. Optimization of air conditioners use throughout the day will reduce energy consumption and expenditure. This study introduces a second-order differential equation model to capture the indoor temperature dynamics of a building. An experimental test bed is developed to collect a set of indoor/outdoor temperature and sunlight data. Using a least-squares-based system identification process, the model parameters are identified and checked through simulation. Optimization of the room temperature is then determined by solving a mixed-integer quadratic programming problem in relation to the hourly-updated energy prices. Mixed-integer quadratic programming solution is compared to a two-point thermostatic control system. A hybrid solution compromising the quadratic programming algorithm and the conventional thermostatic control scheme is proposed as a tractable approach for the near-optimal energy management of the system.
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Feierl, Lukas, Peter Innerhofer, Hannes Poier, Maria Moser, and Christian Holter. "Artificial Neural Network for Performance Prediction of Absorption Chillers of Large-Scale Solar-Air-Conditioning Systems." In ISES Solar World Congress 2019/IEA SHC International Conference on Solar Heating and Cooling for Buildings and Industry 2019. Freiburg, Germany: International Solar Energy Society, 2019. http://dx.doi.org/10.18086/swc.2019.03.01.

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Wei, Bing, and Huayi Yang. "Energy Consumption Analysis of Residential Central Air Conditioning Systems." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90201.

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Nowadays the energy crisis has been more and more severe all over the world. In China there is enormous energy source, but due to the large number of population, the average possession of the total energy is lower, and the energy supply is relatively less. Enormous energy consumption of air conditioning systems in the residential buildings makes the energy conservation more important. The residential central air conditioning systems are being widely used due to its advantages of easy control and low operating cost. But there are still many problems to be resolved, of which the energy consumption of the residential central air-conditioning systems is a hot issue. The main cold and heat sources for residential central air conditioning systems are air-cooled heat pump unit, household gas air conditioning unit, air-cooled chiller unit/gas-fired boiler and water loop heat pump unit. The terminal facilities suited for the anterior three units are the fan coil units, and the terminal of the last water loop heat pump unit is normally indoor unit. The combined utilization of the heat and cold source units with their terminal units keep the indoor environment in desired state all the year. In this paper, based on an actual example, the basic principles of four systems mentioned above are outlined and analyzed, and four schemes are compared. By using the method of equivalent weight full load operation time, the annual energy consumptions of the four schemes are calculated and analyzed. Comparing the annual primary energy consumption of four schemes, the following conclusions can be drawn: in the case studied, the energy consumption of the household gas-fired air conditioning unit with fan coil system is the maximum, the consumption of the air-cooled chiller unit/gas-fired boiler with fan coil system is the next, then is the air-cooled heat pump with fan coil system, and that of the water loop heat pump system is the minimum. It can be observed that the water loop heat pump system is the optimal one and is the best on energy conservation. Through the study of this paper, the minimum energy consumption system is chosen so as to give the references for the energy savings of air-conditioning systems in the practice.
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Khalil, Essam E. "Design of Energy Efficient Commercial Buildings in Developing Countries." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70284.

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Energy Performance of Buildings should include a general framework for the calculation of energy performance and building categories together with thermal characteristics of building, air conditioning, ventilation, lighting and appliances aspects considered. These include Active solar systems contribution to domestic water heating based on renewable energy sources, CPH production and District cooling systems. This paper reviews the energy sources available in Egypt, their distribution and utilization in commercial sectors. The paper demonstrates the importance of incorporating an energy performance directive as a Standard in our region such a goal will aid energy savings in large buildings and set regulations to energy efficient designs that are based on Standard calculation methods. The proposed Standard would be largely based on International Standards and appropriately modified to suit local practices. The target is to develop standardized tools for the calculation of the energy performance of buildings, with defined system boundaries for the different building categories and different cooling/heating systems. The present work is to provide transparent information regarding output data (reference values, benchmarks, etc.) and to define comparable energy related key values (kWh/m2, kWh per person, kWh per apartment, kWh per produced unit etc.). Proposals to develop a common procedure for an “energy performance certificate” and CO2 emissions are given.
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Hu, Tianyi. "Comparison of long-term load forecasting methods for air conditioning system of a large building." In 2021 China Automation Congress (CAC). IEEE, 2021. http://dx.doi.org/10.1109/cac53003.2021.9728514.

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Price, Christopher R., and Bryan P. Rasmussen. "Effective Tuning of Cascaded Control Loops for Nonlinear HVAC Systems." In ASME 2015 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/dscc2015-9806.

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Residential and commercial buildings are large consumers of energy in the United States with Heating, Ventilation, and Air-Conditioning (HVAC) systems representing a significant portion of total use. These systems control aspects such as humidity and room air temperature to ensure building occupant comfort. Control of HVAC units presents unique challenges due to large nonlinearities heavily dependent on operating conditions. Static linear controllers are unable to counteract such nonlinearities resulting in sustained oscillations known as hunting behavior. Previous research has shown the ability of cascaded architectures to compensate for HVAC nonlinearities and improve overall system performance without the need for detailed dynamic models. To aid the implementation of cascaded loops on real building systems, analysis of the effects of inner loop gain are presented and three outer loop tuning cases are identified. A simulation case study of an air handling unit demonstrates the simplicity of the procedure and compares it with optimally tuned gains.
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Reports on the topic "Air conditioning in large buildings"

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Johra, Hicham. Performance overview of caloric heat pumps: magnetocaloric, elastocaloric, electrocaloric and barocaloric systems. Department of the Built Environment, Aalborg University, January 2022. http://dx.doi.org/10.54337/aau467469997.

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Heat pumps are an excellent solution to supply heating and cooling for indoor space conditioning and domestic hot water production. Conventional heat pumps are typically electrically driven and operate with a vapour-compression thermodynamic cycle of refrigerant fluid to transfer heat from a cold source to a warmer sink. This mature technology is cost-effective and achieves appreciable coefficients of performance (COP). The heat pump market demand is driven up by the urge to improve the energy efficiency of building heating systems coupled with the increase of global cooling needs for air-conditioning. Unfortunately, the refrigerants used in current conventional heat pumps can have a large greenhouse or ozone-depletion effect. Alternative gaseous refrigerants have been identified but they present some issues regarding toxicity, flammability, explosivity, low energy efficiency or high cost. However, several non-vapour-compression heat pump technologies have been invented and could be promising alternatives to conventional systems, with potential for higher COP and without the aforementioned refrigerant drawbacks. Among those, the systems based on the so-called “caloric effects” of solid-state refrigerants are gaining large attention. These caloric effects are characterized by a phase transition varying entropy in the material, resulting in a large adiabatic temperature change. This phase transition is induced by a variation of a specific external field applied to the solid refrigerant. Therefore, the magnetocaloric, elastocaloric, electrocaloric and barocaloric effects are adiabatic temperature changes in specific materials when varying the magnetic field, uniaxial mechanical stress, electrical field or hydrostatic pressure, respectively. Heat pump cycle can be built from these caloric effects and several heating/cooling prototypes were developed and tested over the last few decades. Although not a mature technology yet, some of these caloric systems are well suited to become new efficient and sustainable solutions for indoor space conditioning and domestic hot water production. This technical report (and the paper to which this report is supplementary materials) aims to raise awareness in the building community about these innovative caloric systems. It sheds some light on the recent progress in that field and compares the performance of caloric systems with that of conventional vapour-compression heat pumps for building applications.
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Goetzler, William, Matt Guernsey, Jim Young, Jay Fujrman, and Amar Abdelaziz. The Future of Air Conditioning for Buildings. Office of Scientific and Technical Information (OSTI), July 2016. http://dx.doi.org/10.2172/1420235.

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Goetzler, William, Matt Guernsey, J. Young, J. Fuhrman, and Omar Abdelaziz. The Future of Air Conditioning for Buildings - Executive Summary. Office of Scientific and Technical Information (OSTI), July 2016. http://dx.doi.org/10.2172/1326540.

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Bruno, Roberto, Sara Focaccia, and Francesco Tinti. Geostatistical modeling of a shallow geothermal reservoir for air conditioning of buildings. Cogeo@oeaw-giscience, September 2011. http://dx.doi.org/10.5242/iamg.2011.0305.

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Goetzler, Bill, Matt Guernsey, Theo Kassuga, Jim Young, Tim Savidge, Antonio Bouza, Monica Neukomm, and Karma Sawyer. Grid-Interactive Efficient Buildings Technical Report Series: Heating, Ventilation, and Air Conditioning (HVAC); Water Heating; Appliances; and Refrigeration. Office of Scientific and Technical Information (OSTI), December 2019. http://dx.doi.org/10.2172/1577967.

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Goetzler, Bill, Matt Guernsey, and Theo Kassuga. Grid-Interactive Efficient Buildings Technical Report Series: Heating, Ventilation, and Air Conditioning (HVAC); Water Heating; Appliances; and Refrigeration. Office of Scientific and Technical Information (OSTI), December 2019. http://dx.doi.org/10.2172/1580209.

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Mendell, M. J., Q. Lei-Gomez, A. Mirer, O. Seppanen, and G. Brunner. Risk Factors in Heating, Ventilating, and Air-Conditioning Systemsfor Occupant Symptoms in U.S. Office Buildings: the EPA BASE Study. Office of Scientific and Technical Information (OSTI), October 2006. http://dx.doi.org/10.2172/902452.

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Michalak, Julia, Josh Lawler, John Gross, and Caitlin Littlefield. A strategic analysis of climate vulnerability of national park resources and values. National Park Service, September 2021. http://dx.doi.org/10.36967/nrr-2287214.

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The U.S. national parks have experienced significant climate-change impacts and rapid, on-going changes are expected to continue. Despite the significant climate-change vulnerabilities facing parks, relatively few parks have conducted comprehensive climate-change vulnerability assessments, defined as assessments that synthesize vulnerability information from a wide range of sources, identify key climate-change impacts, and prioritize vulnerable park resources (Michalak et al. In review). In recognition that funding and planning capacity is limited, this project was initiated to identify geographies, parks, and issues that are high priorities for conducting climate-change vulnerability assessments (CCVA) and strategies to efficiently address the need for CCVAs across all U.S. National Park Service (NPS) park units (hereafter “parks”) and all resources. To help identify priority geographies and issues, we quantitatively assessed the relative magnitude of vulnerability factors potentially affecting park resources and values. We identified multiple vulnerability factors (e.g., temperature change, wildfire potential, number of at-risk species, etc.) and sought existing datasets that could be developed into indicators of these factors. To be included in the study, datasets had to be spatially explicit or already summarized for individual parks and provide consistent data for at least all parks within the contiguous U.S. (CONUS). The need for consistent data across such a large geographic extent limited the number of datasets that could be included, excluded some important drivers of climate-change vulnerability, and prevented adequate evaluation of some geographies. The lack of adequately-scaled data for many key vulnerability factors, such as freshwater flooding risks and increased storm activity, highlights the need for both data development and more detailed vulnerability assessments at local to regional scales where data for these factors may be available. In addition, most of the available data at this scale were related to climate-change exposures, with relatively little data available for factors associated with climate-change sensitivity or adaptive capacity. In particular, we lacked consistent data on the distribution or abundance of cultural resources or accessible data on infrastructure across all parks. We identified resource types, geographies, and critical vulnerability factors that lacked data for NPS’ consideration in addressing data gaps. Forty-seven indicators met our criteria, and these were combined into 21 climate-change vulnerability factors. Twenty-seven indicators representing 12 vulnerability factors addressed climate-change exposure (i.e., projected changes in climate conditions and impacts). A smaller number of indictors measured sensitivity (12 indicators representing 5 vulnerability factors). The sensitivity indicators often measured park or landscape characteristics which may make resources more or less responsive to climate changes (e.g., current air quality) as opposed to directly representing the sensitivity of specific resources within the park (e.g., a particular rare species or type of historical structure). Finally, 6 indicators representing 4 vulnerability factors measured external adaptive capacity for living resources (i.e., characteristics of the park and/or surrounding landscape which may facilitate or impede species adaptation to climate changes). We identified indicators relevant to three resource groups: terrestrial living, aquatic living (including living cultural resources such as culturally significant landscapes, plant, or animal species) and non-living resources (including infrastructure and non-living cultural resources such as historic buildings or archeological sites). We created separate indicator lists for each of these resource groups and analyzed them separately. To identify priority geographies within CONUS,...
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