Journal articles: 'Heat Pump Controller Assessment'

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S. Raghuwanshi, Santosh, and Vikas Khare. "Sizing and implementation of Photovoltaic Water Pumping System for Irrigation." IAES International Journal of Artificial Intelligence (IJ-AI) 7, no. 1 (March 1, 2018): 54. http://dx.doi.org/10.11591/ijai.v7.i1.pp54-62.

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Solar photovoltaic systems convert energy of light directly into electrical energy. This work presents, a process to compute the required size of the stand-alone solar photovoltaic generator based water pumping system for an existing area. In addition solar photovoltaic generator is connecting voltage source inverter fed vector controlled induction motor-pump system. Perturb and observe are used for harvesting maximum power of PV generator in between buck-boost DC converter and inverter system. In this paper system result is validated by fuzzy logic system and compare with variable frequency drives based PI controllers, driving motor-pump system. The operational performance at 60 m head, VFD based controllers in terms overshoot and setting time and also analysis performance of motor-pump set under different weather conditions. By assessment of system we find that speed and torque variation, overshoot and settling time is more with PI controller, Fuzzy logic controller (FLC) performance have dominance to VFD based PI controller.

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Deibert, Brendan, and Travis Wiens. "Performance Assessment of a Low-Cost Miniature Electrohydrostatic Actuator." Actuators 11, no. 11 (November 18, 2022): 334. http://dx.doi.org/10.3390/act11110334.

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Low-cost small-scale (<100 W) electrohydrostatic actuators (EHAs) are not available on the market, largely due to a lack of suitable components. Utilizing plastic 3D printing, a novel inverse shuttle valve has been produced which, when assembled with emerging small-scale hydraulic pumps and cylinders from the radio-controlled hobby industry, forms a low-cost and high-performance miniature EHA. This paper presents experimental test results that characterize such a system and highlight its steady, dynamic, and thermal performance capabilities. The results indicate that the constructed EHA has good hydraulic efficiency downstream of the pump and good dynamic response but is limited by the efficiency of the pump and the associated heat generated from the pump’s losses. The findings presented in this paper validate the use of a 3D printed plastic inverse shuttle valve in the construction of a low-cost miniature EHA system.

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Petrash, V. D., V. P. Baryshev, L. F. Shevchenko, E. A. Geraskina, and N. V. Danichenko. "Perspective Ways of Energy-Efficient Modernization of Heat Supply Systems Based on Heat Pump Technologies." Problems of the Regional Energetics, no. 4(56) (November 2022): 47–60. http://dx.doi.org/10.52254/1857-0070.2022.4-56.05.

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This work is devoted to determination a generalized indicator for a preliminary assessment of the conditions for increasing the efficiency of modernized systems of centralized and decentralized heat supply using heat pump technologies. This goal is achieved through a critical analysis of the results of the actual state of pipelines and equipment, known approaches to the reconstruction of heat supply systems and the establishment of a generalized indicator of the conditions for increasing the efficiency of using primary fuel energy. This made it possible to formulate a generalized approach to the modernization of heat supply systems with the introduction of heat pump technologies. The most important result of the study is the established generalized dependence of the assessment of the increase in the efficiency of heat supply systems on the initial conditions of regime parameters with the rationale for the feasibility of modernizing district heating systems based on the diverse phased introduction of heat pump technologies at all stages: generation, transportation, distribution, conversion and controlled consumption of heat by subscriber system. The significance of the obtained research results lies in the fact that the proposed approach to the modernization of centralized and decentralized heat supply systems based on heat pump installations with real conversion factors in the range (3--5) with an increase in the available heat potential is to increase the efficiency and expand the use of heat from primary fuel with its savings of 1-2.7 times.

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SUYAMA, Akihiro, and Kazuhiro SAISHIYO. "Economic Assessment of Optimal Controlled Heat Pump Water Heating and Supply System." Proceedings of the National Symposium on Power and Energy Systems 2017.22 (2017): C132. http://dx.doi.org/10.1299/jsmepes.2017.22.c132.

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Osintsev, Konstantin, Sergei Aliukov, and Yuri Prikhodko. "A Case study of Exergy Losses of a Ground Heat Pump and Photovoltaic Cells System and Their Optimization." Energies 14, no. 8 (April 8, 2021): 2077. http://dx.doi.org/10.3390/en14082077.

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The aim of this scientific research is to experimentally determine the exergy losses of a ground heat pump and further optimization for more efficient use of operating modes and improvement of individual structural elements. In addition, it is proposed to use photovoltaic panels as a backup power source for the experimental installation under study. The exergetic losses are calculated, not only for the ground heat pump itself, with R407C refrigerant. The research methodology consists in a comprehensive assessment of exergetic flows, their optimization using new methods of approximation of piecewise linear functions, and the development of prerequisites for the use of anergy as one of the components of a new type of analysis of the efficiency of low-potential energy sources. As a result of processing the experimental data, the values of Coefficient of performance (COP) 4.136, exergetic temperature for the lower heat source 0.0253 and for the upper heat source 0.155, exergetic efficiency of the installation 0.62, and total loss of specific exergy of the heat pump 24.029 kJ/kg were obtained. Controllers with the Modbus protocol were used for data collection. Matlab Simulink was used to process the experimental data. When carrying out the procedure for optimizing the operating modes and selecting several modes with minimal exergetic losses, an important role is given to mathematical methods of processing statistical data. The method of increasing the efficiency of the heat pump is shown, first of all, based on the use of photovoltaic panels as a backup power source and optimization of exergetic losses due to exergo-anergetic evaluation of operating modes. The authors present the measurement errors of the heat pump plant parameters in the form of a 3D Gaussian curve, which becomes possible only when applying new approximation methods in the processing of measurements.

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Abid, Muhammad, Neil Hewitt, Ming-Jun Huang, Christopher Wilson, and Donal Cotter. "Domestic Retrofit Assessment of the Heat Pump System Considering the Impact of Heat Supply Temperature and Operating Mode of Control—A Case Study." Sustainability 13, no. 19 (September 29, 2021): 10857. http://dx.doi.org/10.3390/su131910857.

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In this study, performance assessment of the variable speed compressor-based air source heat pump (ASHP) system as a domestic retrofit technology instead of fossil fuel-based heating technologies for the 1900s Mid terraced house is investigated. The assessment was conducted considering operating mode of control and heat supply temperature impact of the system. In the literature, ASHP system experimental development with variable speed mode (VSM) of control in comparison to fixed speed mode (FSM) of control at low to medium and high heat supply temperature in the context of UK was found with very limited number of studies, but without considering retrofit application. The focus of the earlier studies was on the individual components and performance improvement. The designed heat pump (HP), developed, and tested at constant heat load, simulating the real domestic heat demand under the controlled laboratory conditions and numerical modeling is utilized for the analysis purposes. The HP performance, energy demand, carbon emissions, and cost varies significantly due to changing heat supply temperature (35 °C, 45 °C, and 55 °C), control mode and accordingly the carbon emission and cost savings are achieved. The oil and gas boilers ranges from conventional to highly efficient type and evaluated in terms of annual running cost, energy consumptions, and carbon emissions in comparison with the HP system. Additionally, a comparative study with the existing retrofitted very high temperature ASHP inside the house is conducted. The developed HP at 55 °C could not defeat the very high heat supply temperature HP system (75 °C supply temperature) in performance and cost savings but become attractive at low supply temperature (35 °C). The HP system in VSM at low heat supply temperature instead of gas boiler (90% efficiency) could cut the annual carbon emissions by 59% but with additional 6% running cost for the Mid terraced test house in Belfast climatic conditions.

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Muravyova, E. A., and R. F. Imaev. "Synthesis of a fuzzy controller for identification and quantification of disturbances by trends." Journal of Physics: Conference Series 2094, no. 4 (November 1, 2021): 042084. http://dx.doi.org/10.1088/1742-6596/2094/4/042084.

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Abstract This article describes the main stages of constructing a fuzzy controller that identifies disturbances in the automatic control system by trends on the example of the brine cycle, namely, heating the purified one going to electrolysis. This method can be implemented in perturbation control systems for the formation of control actions, as well as for diagnostic purposes. The aim of the study is to synthesize a fuzzy controller for identifying and quantifying perturbations by trends. The article proposes a method for estimating perturbations by trends. A mathematical model of processes implemented in the Mathcad environment is constructed. A conceptual model of a fuzzy controller for determining the perturbation is implemented. As a result of the research conducted on the basis of the proposed method, two fuzzy controllers were synthesized that quantify disturbances in the water heating cycle, namely: the deviation of the temperature of the purified brine entering the heat exchanger, as well as the deviation of the water temperature in the tank from the norm. The developed project is of practical importance, since the information about disturbances obtained as an output value from the fuzzy controller can be used in the diagnosis and assessment of the system state at any time, which, in turn, can be used for smoother control when applying a correction signal to the controller that controls the dampers and pumps, as well as to prevent accidents.

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D’Ettorre, F., M. De Rosa, P. Conti, E. Schito, D. Testi, and D. P. Finn. "Economic assessment of flexibility offered by an optimally controlled hybrid heat pump generator: a case study for residential building." Energy Procedia 148 (August 2018): 1222–29. http://dx.doi.org/10.1016/j.egypro.2018.08.008.

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Gizzi, Martina, Glenda Taddia, Elena Cerino Abdin, and Stefano Lo Russo. "Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions." Geofluids 2020 (April 27, 2020): 1–13. http://dx.doi.org/10.1155/2020/2640917.

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Thermal perturbation produced in the subsurface by open-loop groundwater heat pump systems (GWHPs) must be predicted and constantly controlled, especially in the shallow aquifers of more densely urbanized areas, in order to guarantee plants’ long-term sustainable use and to avoid adverse effects on adjacent geothermal systems. Transient conditions in the flow dynamic can be successfully modelled by means of numerical modelling tools. However, for small plants in suitable hydrogeological systems, an alternative tool for predicting the thermally affected zone (TAZ) around the injection well can be found in analytical solutions for steady advective transport in a shallow aquifer. The validity of using steady analytical solutions to predict the TAZ development at the end of two different cooling seasons (2010 and 2016) was tested in the Politecnico di Torino GWHP system (NW Italy). When fixing the constant thermal difference (ΔT) between the injection and abstraction wells at 5°C, results revealed that a rather reliable assessment of the TAZ of Politecnico di Torino GWHPs, in Turin shallow aquifer, can be performed by plotting the cumulative distribution function of the injected discharge rate (Q) and setting 63% as a steady value.

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Bosisio, Alessandro, Matteo Moncecchi, Andrea Morotti, and Marco Merlo. "Machine Learning and GIS Approach for Electrical Load Assessment to Increase Distribution Networks Resilience." Energies 14, no. 14 (July 8, 2021): 4133. http://dx.doi.org/10.3390/en14144133.

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Currently, distribution system operators (DSOs) are asked to operate distribution grids, managing the rise of the distributed generators (DGs), the rise of the load correlated to heat pump and e-mobility, etc. Nevertheless, they are asked to minimize investments in new sensors and telecommunication links and, consequently, several nodes of the grid are still not monitored and tele-controlled. At the same time, DSOs are asked to improve the network’s resilience, looking for a reduction in the frequency and impact of power outages caused by extreme weather events. The paper presents a machine learning GIS-based approach to estimate a secondary substation’s load profiles, even in those cases where monitoring sensors are not deployed. For this purpose, a large amount of data from different sources has been collected and integrated to describe secondary substation load profiles adequately. Based on real measurements of some secondary substations (medium-voltage to low-voltage interface) given by Unareti, the DSO of Milan, and georeferenced data gathered from open-source databases, unknown secondary substations load profiles are estimated. Three types of machine learning algorithms, regression tree, boosting, and random forest, as well as geographic information system (GIS) information, such as secondary substation locations, building area, types of occupants, etc., are considered to find the most effective approach.

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Li, Ya Rong, and Teng Fei Zheng. "Design of Household Carbon Dioxide Heat Pump Controller Man-Machine Interface Based on C8051F500." Advanced Materials Research 945-949 (June 2014): 2606–10. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2606.

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Carbon dioxide heat pump controller using carbon dioxide phase transition theory, in conjunction with the heat pump main controller and man-machine interface, can realize the user free on the regulation of water temperature. The carbon dioxide heat pump controller design of a human-computer interface. The control core with C8051F500 MCU as the main body of the system, has a unique memory function, including function: display module, key module, clock module, communication module, power module, and the heat pump main control board through the CAN bus. Through the experiment, the system is stable and reliable, has the features of functional diversity, humanization design, can promote household CO2 heat pump.

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OHGATA, AKIHIRO, YUH YAMASHITA, and HIROKAZU NISHITANI. "Controller Design of Absorption Heat Pump System via LMI." KAGAKU KOGAKU RONBUNSHU 24, no. 2 (1998): 291–98. http://dx.doi.org/10.1252/kakoronbunshu.24.291.

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Carrington, C. G., and I. R. Cox-Smith. "Assessment of a domestic heat pump 1: The house/heat-pump interaction." International Journal of Energy Research 13, no. 6 (1989): 673–86. http://dx.doi.org/10.1002/er.4440130607.

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Catton, W., C. G. Carrington, and Z. F. Sun. "Performance assessment of contact heat pump drying." International Journal of Energy Research 35, no. 6 (April 7, 2011): 489–500. http://dx.doi.org/10.1002/er.1704.

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Anderson, J. A., R. A. Bradford, and C. G. Carrington. "Assessment of a heat pump water heater." International Journal of Energy Research 9, no. 1 (January 1985): 77–89. http://dx.doi.org/10.1002/er.4440090108.

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Khosravi, Mohammad, Nicolas Schmid, Annika Eichler, Philipp Heer, and Roy S. Smith. "Machine learning-based modeling and controller tuning of a heat pump." Journal of Physics: Conference Series 1343 (November 2019): 012065. http://dx.doi.org/10.1088/1742-6596/1343/1/012065.

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OHGATA, AKIHIRO, YUH YAMASHITA, and HIROKAZU NISHITANI. "Application of Controller Design with Multiple Specifications to Absorption Heat Pump." KAGAKU KOGAKU RONBUNSHU 25, no. 5 (1999): 721–27. http://dx.doi.org/10.1252/kakoronbunshu.25.721.

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Li, Yantong, Natasa Nord, Inge Håvard Rekstad, Stein Kristian Skånøy, and Lars Konrad Sørensen. "Study of a water-source CO2 heat pump for residential use: experimental discharge pressure control and performance analysis." E3S Web of Conferences 246 (2021): 06010. http://dx.doi.org/10.1051/e3sconf/202124606010.

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The heat pumps with the refrigerant of carbon dioxide (CO2), i.e., CO2 heat pumps, have the merits of low price and environmentally friendliness in comparison with those with traditional refrigerants, e.g., hydrochlorofluorocarbons and chlorofluorocarbons. Current studies mainly focused on the air-source CO2 heat pumps, while investigations about the CO2 heat pumps gaining heat or cold energy from different mediums, e.g., water, are lacking. In addition, although few studies presented the investigations on the discharge pressure of the CO2 heat pumps (e.g., investigations of optimal discharge pressure), how to realize the effective discharge pressure control in the experimental conditions is still lacking. To remedy these knowledge gaps, this study presented an experimental investigation of a water-source CO2 heat pump for residential use. A PI controller was used to maintain the fixed discharge pressure by adjusting the opening of the electronic expansion valve. The dynamic performance of the CO2 heat pump in the typical discharge pressure of 7,200 to 8,400 kPa were analyzed. The results indicated that the method of using the PI controller to adjust the opening of the electronic expansion valve could effectively maintain the desired discharge pressure of the CO2 heat pump in the experimental conditions.

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Xiong, Jing Jing, and Li Tao Zhou. "The Research and Development of Motor Cooling Control System Based on Electronic Parking Brake Test Bench." Applied Mechanics and Materials 733 (February 2015): 674–79. http://dx.doi.org/10.4028/www.scientific.net/amm.733.674.

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When Electronic Parking Brake test bench validates the function of ramp start, Electronic Parking Brake (Simplified as EPB) control motor has been blocked state, the motor heat is large. Followed putting forward the performance required by the motor cooling system, and the cooling control system scheme and the control strategy of intelligent electronic pump motor by building a mathematical module about cooling system of EPB motor, this paper designs and develops the electronic water pump motor controller, including the efficient control on the pump, and the communication with the main controller, which is based on CAN bus and SAE J1939 and optimizes the hardware and software of motor controller so that the pump efficiency may reach 32%. The product-level design, shown by a large number of performances testing, is achieved.

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Ubl, Martin, Tomas Koutny, Antonio Della Cioppa, Ivanoe De Falco, Ernesto Tarantino, and Umberto Scafuri. "Distributed Assessment of Virtual Insulin-Pump Settings Using SmartCGMS and DMMS.R for Diabetes Treatment." Sensors 22, no. 23 (December 2, 2022): 9445. http://dx.doi.org/10.3390/s22239445.

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Diabetes is a heterogeneous group of diseases that share a common trait of elevated blood glucose levels. Insulin lowers this level by promoting glucose utilization, thus avoiding short- and long-term organ damage due to the elevated blood glucose level. A patient with diabetes uses an insulin pump to dose insulin. The pump uses a controller to compute and dose the correct amount of insulin to keep blood glucose levels in a safe range. Insulin-pump controller development is an ongoing process aiming at fully closed-loop control. Controllers entering the market must be evaluated for safety. We propose an evaluation method that exploits an FDA-approved diabetic patient simulator. The method evaluates a Cartesian product of individual insulin-pump parameters with a fine degree of granularity. As this is a computationally intensive task, the simulator executes on a distributed cluster. We identify safe and risky combinations of insulin-pump parameter settings by applying the binomial model and decision tree to this product. As a result, we obtain a tool for insulin-pump settings and controller safety assessment. In this paper, we demonstrate the tool with the Low-Glucose Suspend and OpenAPS controllers. For average ± standard deviation, LGS and OpenAPS exhibited 1.7 ± 0.6% and 3.2 ± 1.8% of local extrema (i.e., good insulin-pump settings) out of all the entire Cartesian products, respectively. A continuous region around the best-discovered settings (i.e., the global extremum) of the insulin-pump settings spread across 4.0 ± 1.1% and 4.1 ± 1.3% of the Cartesian products, respectively.

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Violante, Anna Carmela, Filippo Donato, Giambattista Guidi, and Marco Proposito. "Comparative life cycle assessment of the ground source heat pump vs air source heat pump." Renewable Energy 188 (April 2022): 1029–37. http://dx.doi.org/10.1016/j.renene.2022.02.075.

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Kuboth, Sebastian, Theresa Weith, Florian Heberle, Matthias Welzl, and Dieter Brüggemann. "Experimental Long-Term Investigation of Model Predictive Heat Pump Control in Residential Buildings with Photovoltaic Power Generation." Energies 13, no. 22 (November 18, 2020): 6016. http://dx.doi.org/10.3390/en13226016.

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This article presents a 125-day experiment to investigate model predictive heat pump control. The experiment was performed in two parallel operated systems with identical components during the heating season. One of the systems was operated by a standard controller and thus represented a reference to evaluate the model predictive control. Both test rigs were heated by an air-source heat pump which is influenced by real weather conditions. A single-family house model depending on weather measurement data ensured a realistic heat consumption in the test rigs. The adapted model predictive control algorithm aimed to minimize the operational costs of the heat pump. The evaluation of the measurement results showed that the electrical energy demand of the heat pump can be reduced and the coefficient of performance can be increased by applying the model predictive controller. Furthermore, the self-consumption of photovoltaic electricity, which is calculated by means of a photovoltaic model and global radiation measurement data, was more than doubled. Consequently, the energy costs of heat pump operation were reduced by 9.0% in comparison to the reference and assuming German energy prices. The results were further compared to the scientific literature and short-term measurements were performed with the same experimental setup. The dependence of the measurement results on the weather conditions and the weather forecasting quality are shown. It was found that the duration of experiments should be as long as possible for a comprehensive evaluation of the model predictive control potential.

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Šulgan, Branislav, Juraj Labovský, Miroslav Variny, and Zuzana Labovská. "Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production." Processes 9, no. 8 (August 6, 2021): 1380. http://dx.doi.org/10.3390/pr9081380.

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Multi-objective (energy–economic–safety) assessment of ethyl acetate production involving a heat pump is presented in this paper. The heat pump is designed to intensify ethyl acetate separation and to reduce the total operating cost. Two ethyl acetate production pathways are upgraded using a heat pump, conventional process and reactive distillation column with a separation unit. Detailed process models including the heat pump environment have been compiled and optimized in the Aspen Plus software. Both benefits and drawbacks of including the heat pump in the processes are evaluated using three different points of view: process energy, economics, and safety. As a result, using a heat pump is highly recommended in both conventional process and reactive distillation column with a separation unit. As a higher level of process integration is achieved using a heat pump, economic aspects are improved; however, safety aspects deteriorate. The final decision on the suitability of using a heat pump depends on whether it is proposed for an existing plant, or a completely new plant is designed. In a new plant, the concept of a thermally coupled process (reactive distillation column with a stripper column) has been proven to be the most promising.

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Yang, Y., M. Datcheva, D. König, and T. Schanz. "Heat transfer in a geothermal heat-pump system – an analytical assessment." Géotechnique Letters 4, no. 2 (April 29, 2014): 139–44. http://dx.doi.org/10.1680/geolett.13.00055.

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Nhut, Le Minh, and Youn Cheol Park. "A Study on Developing an Automatic Controller with an Inverter Collector Pump for Solar-Assisted Heating System." Energies 13, no. 9 (April 27, 2020): 2128. http://dx.doi.org/10.3390/en13092128.

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In this study, based on the optimal equation m = 0.05 Δ T A c (kg/min) of the variable mass flow rate in the collector loop, an automatic controller with an inverter collector pump for the collector loop of the solar-assisted heating system is designed for these experiments and to then be used for real industry. The pump for the collector loop is an inverter type that is controlled by an embedded controller with Windows, based on C# language, and the change of speed depends on the variation of the mass flow rate through the collector loop. The input of the automatic controller with an inverter collector pump is given by a thermocouple input module that is connected to the embedded controller with the RS-485 communication protocol. In this work, the experiments were carried out on three different days, namely a clear day, an intermittently cloudy day and an overcast day, to evaluate the stability and the precision of the automatic controller, as well as the contribution of the useful heat gain from the collector for the solar-assisted heating system. Simulation and experimental results are also validated and analyzed.

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Cai, Chaozhi, Yunhua Li, and Sujun Dong. "Compound sliding-mode predictive control for a temperature system of high-speed heat-airflow wind tunnel." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 11 (November 13, 2013): 1869–79. http://dx.doi.org/10.1177/0954406213511962.

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The mathematical model of the temperature system under the mode of the proportional throttle valve control and the variable frequency pump control is established, respectively. A compound control strategy that consists of a compensation controller and a sliding-mode predictive feedback controller is designed. The compensation controller, which takes the change of the wind speed as parameter, is used to eliminate the impact on the system caused by the change of the working conditions (wind speed); the sliding-mode predictive feedback controller is used to solve the problems in the system such as time delay, time-varying parameters and disturbance. In order to solve the problem of temperature disturbance caused by the mode switch between pump control and valve control and the oil-rich combustion phenomenon in the high-temperature case, a method takes the ramp signal in which the slope is adjustable as a temperature setting signal is proposed. The experimental results show that the designed strategy obtains a satisfactory control performance and can achieve the temperature control with fast response time and no overshoot. In addition, it takes the ramp signal in which the slope is adjustable as the temperature setting signal can achieve the undisturbed switching control of the temperature and prevent the oil-rich combustion effectively.

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Choo, Yeon-Gyu. "Design of an Intelligent Controller for Waste Water Heat Pump Recycled Energy Systems." Journal of information and communication convergence engineering 9, no. 4 (August 31, 2011): 375–78. http://dx.doi.org/10.6109/jicce.2011.9.4.375.

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Kim, Yongchan, and Jong Min Choi. "Numerical Simulation of a System Heat Pump Adopting an Integral Optimum Regulating Controller." Korean Journal of Air-Conditioning and Refrigeration Engineering 25, no. 7 (July 10, 2013): 398–405. http://dx.doi.org/10.6110/kjacr.2013.25.7.398.

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Allison, John, Andrew Cowie, Stuart Galloway, Jon Hand, Nicolas J. Kelly, and Bruce Stephen. "Simulation, implementation and monitoring of heat pump load shifting using a predictive controller." Energy Conversion and Management 150 (October 2017): 890–903. http://dx.doi.org/10.1016/j.enconman.2017.04.093.

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Chakrabarty, Ankush, Daniel J. Burns, Martin Guay, and Christopher R. Laughman. "Extremum seeking controller tuning for heat pump optimization using failure-robust Bayesian optimization." Journal of Process Control 120 (December 2022): 86–96. http://dx.doi.org/10.1016/j.jprocont.2022.11.006.

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Aditya, Gregorius Riyan, and Guillermo A. Narsilio. "Environmental assessment of hybrid ground source heat pump systems." Geothermics 87 (September 2020): 101868. http://dx.doi.org/10.1016/j.geothermics.2020.101868.

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Wikoff, Penny, Dan Suciu, William Schutte, Glen Carpenter, Victor Forsness, and Keith Prisbrey. "Practical assessment of a Solvay-type heat amplifying pump." Heat Recovery Systems and CHP 12, no. 5 (September 1992): 377–84. http://dx.doi.org/10.1016/0890-4332(92)90058-p.

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Yari, Mortaza, and Nader Javani. "Performance assessment of a horizontal-coil geothermal heat pump." International Journal of Energy Research 31, no. 3 (2007): 288–99. http://dx.doi.org/10.1002/er.1230.

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Zhao, Xueyuan, Weijun Gao, Yanxue Li, and Yoshiaki Ushifusa. "Load Shifting Assessment of Residential Heat Pump System in Japan." International Journal of Environmental Science & Sustainable Development 4, no. 3 (December 30, 2019): 101. http://dx.doi.org/10.21625/essd.v4i3.680.

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With the economic growth and increasing requirement of indoor thermal comfort, the load of building sector presents a greater variability.This paper aims at analyzing the energy consumption characteristics and influencing factors of the residential heat pump system. Firstly, we selected residential households as investigated objective in Kitakyushu, Japan, and compared the energy saving performances of heat supply systems between heat pump and natural gas boiler. The results were based on real measured residential load during winter period, and calculated the cost saving performance of residential heat pump system compared with traditional natural gas boiler. We also did a survey of residential occupation behavior for the 12 selected residential customers. The result indicated that there was low relationship between power consumption and occupation hours, and the number of family members had a significant impact on the power consumption. The results indicate that residential heat pump system presented promising energy saving and cost reduction potential.

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Keogh, David, Mohammad Saffari, Mattia de Rosa, and Donal P. Finn. "Energy assessment of hybrid heat pump systems as a retrofit measure in residential housing stock." E3S Web of Conferences 111 (2019): 01064. http://dx.doi.org/10.1051/e3sconf/201911101064.

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Hybrid electric-gas heat pump systems are a possible retrofit option in older residential buildings. Older buildings can be challenging to retrofit and in this context hybrid systems can offer an intermediate route to decarbonisation of building heating energy demand. This is especially the case, where deep retrofit measures coupled with monovalent electric heat pump systems may not be feasible from an economic perspective. The aim of the current paper is to examine the suitability of a hybrid electric-gas heat pump system in comparison to electric heat pump systems as a retrofit measure for Irish housing stock and to benchmark both options against existing fossil fuel baseline systems. A detailed building energy model of a residential dwelling was developed and calibrated to within acceptable ASHRAE standards. An energy assessment was carried out which investigates each retrofit scenario. Key findings include: (i) both the all-electric and hybrid heat pump systems deliver primary energy savings compared to the fossil fuel baseline systems, (ii) hybrid systems attain higher primary energy savings compared to all-electric heat pump, where the hybrid system incorporates flexible delivery temperatures compared to a fixed delivery temperature tor the all-electric heat pump system.

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Sawant, Parantapa, Oscar Villegas Mier, Michael Schmidt, and Jens Pfafferott. "Demonstration of Optimal Scheduling for a Building Heat Pump System Using Economic-MPC." Energies 14, no. 23 (November 28, 2021): 7953. http://dx.doi.org/10.3390/en14237953.

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It is considered necessary to implement advanced controllers such as model predictive control (MPC) to utilize the technical flexibility of a building polygeneration system to support the rapidly expanding renewable electricity grid. These can handle multiple inputs and outputs, uncertainties in forecast data, and plant constraints, amongst other features. One of the main issues identified in the literature regarding deploying these controllers is the lack of experimental demonstrations using standard components and communication protocols. In this original work, the economic-MPC-based optimal scheduling of a real-world heat pump-based building energy plant is demonstrated, and its performance is evaluated against two conventional controllers. The demonstration includes the steps to integrate an optimization-based supervisory controller into a typical building automation and control system with off-the-shelf HVAC components and usage of state-of-art algorithms to solve a mixed integer quadratic problem. Technological benefits in terms of fewer constraint violations and a hardware-friendly operation with MPC were identified. Additionally, a strong dependency of the economic benefits on the type of load profile, system design and controller parameters was also identified. Future work for the quantification of these benefits, the application of machine learning algorithms, and the study of forecast deviations is also proposed.

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Denysova, A. E., and І. O. Bodnar. "Assessment of two-level heat pump installations’ power efficiency for heat supply systems." Odes’kyi Politechnichnyi Universytet. Pratsi, no. 2 (June 15, 2015): 85–91. http://dx.doi.org/10.15276/opu.2.46.2015.16.

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Tarasova, E., and V. Korotynskaya. "ASSESSMENT OF THE POSSIBILITY OF SOLAR HEAT SUPPLY USING AN AIR HEAT PUMP." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 7, no. 10 (June 10, 2022): 41–48. http://dx.doi.org/10.34031/2071-7318-2022-7-10-41-48.

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Solar energy is one of the sources of renewable energy. However, during the cold season in Russia, the use of solar energy is difficult due to low outdoor air temperatures. The purpose of this article is to analyze the possibility of energy saving when using solar energy for the heating system of an individual residential building in Vladivostok. The latitude of the city is 43 °, but the estimated temperature for the design of heating is -22 ° C. This greatly complicates the use of solar heat. The possibility of accumulation of low-potential heat in a specially equipped outhouse (greenhouse) for conversion by a thermal air-water pump is analyzed in order to use it for heating needs in the future. Two constructions are considered as the finishing material of the extension: a two-layer polycarbonate with an air layer and an energy-saving double-glazed window. The calculation shows that in the coldest month is January, the potential of solar thermal energy is 14 %–37 % of the required heat demand, depending on the material used in the construction of the extension. In March and April, excess heat is generated. It can be used for hot water supply needs. Thus, for an individual residential building, the use of solar heat accumulated in a greenhouse extension is relevant as an additional source of heat for the heating system.

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Doseva, Nadezhda, Daniela Chakyrova, Svetoslav Stoianov, and Ilia Hadhidimov. "Air-to-water heat pump assessment: Part 1 – Experimental setup." E3S Web of Conferences 327 (2021): 01009. http://dx.doi.org/10.1051/e3sconf/202132701009.

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This paper is part 1 of the investigation on the exergetic and exergoeconomic parameters of an existing system with an air-to-water heat pump unit as a heat source. Part 1 presents the used experimental setup. The main aim of the conducted experimental tests is to develop a model of produced heat transfer rate and energetic COP at different ambient conditions. The obtained data is used in Part 2 of the study where the exergetic and exergoeconomic assessment is carried out. The performance of the considered system is evaluated using Seasonal Exergy Efficiency. Moreover, Part 2 of the study has presented the formulation of the cost of the product, and cost allocation within the heat pump unit based on exergy.

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Jiang, Jiatong, Bin Hu, Tianshu Ge, and R. Z. Wang. "Comprehensive selection and assessment methodology of compression heat pump system." Energy 241 (February 2022): 122831. http://dx.doi.org/10.1016/j.energy.2021.122831.

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Fischer, David, Tobias Wolf, Jeannette Wapler, Raphael Hollinger, and Hatef Madani. "Model-based flexibility assessment of a residential heat pump pool." Energy 118 (January 2017): 853–64. http://dx.doi.org/10.1016/j.energy.2016.10.111.

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Hajabdollahi, Hassan. "Assessment of an Optimal Combined Heat Pump and Trigeneration System." Energy Technology 3, no. 10 (July 31, 2015): 1026–37. http://dx.doi.org/10.1002/ente.201500122.

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Sewastianik, Sara, and Andrzej Gajewski. "Energetic and Ecologic Heat Pumps Evaluation in Poland." Energies 13, no. 18 (September 22, 2020): 4980. http://dx.doi.org/10.3390/en13184980.

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The purpose of the work is a comparison of indirect carbon dioxide emissions between the different heat pump types that operate in Polish climate conditions. The analysis embraces air-to-water heat pump, ground-to-water heat pump, water-to-water heat pump and water-to-water heat pump with separating heat exchanger in the selected towns one in each climatic zone in the country. The study starts from determining seasonal coefficient of performance in each location using heating degree days to estimate seasonal heat demand. Seasonal coefficient of performance values enable an assessment which kind of heat pump meets the European Union requirements in every location. Eventually, indirect CO2 emissions that is caused by electrical energy production, are estimated for every heat pump in each location. Ground-to-water heat pump and water-to-water heat pump satisfy these requirements in each climatic zone in Poland. Air-to-water heat pump would be an energetic and ecological viable on a condition that substantial changes were done in Polish electrical energy mix.

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Doseva, Nadezhda, and Daniela Chakyrova. "Air-to-water heat pump assessment: Part 2 – Exergetic and exergoeconomic analyses." E3S Web of Conferences 327 (2021): 01010. http://dx.doi.org/10.1051/e3sconf/202132701010.

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This study is part 2 of the investigation on the exergetic and exergoeconomic parameters of an existing system with an air-to-water heat pump unit as a heat source. Part 1 presents the used experimental setup. The main aim of the conducted experimental tests is to develop models of produced heat rate and energetic COP at different ambient conditions. The obtained data is used in Part 2 of the study where the exergetinc and exergoeconomic assessment is carried out. The exergetic and exergoeconomic analysis was performed at dynamically changing ambient parameters. The considered operation modes of the air-to-water heat pump (AWHP) unit and backup heater (BUH) were evaluated based on Seasonal Exergetic Efficiency. For the exergoeconomic analysis, the SPECO method is used. Thus, this paper provides an exhaustive understanding of the exergy and exergoeconomic performance of the considered air-to-water heat pump system.

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Li, Zhexu, Haibo Cao, Hanxin Yang, and Juncheng Guo. "Comparative Assessment of Various Low-Dissipation Combined Models for Three-Terminal Heat Pump Systems." Entropy 23, no. 5 (April 23, 2021): 513. http://dx.doi.org/10.3390/e23050513.

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Thermally driven heat pump systems play important roles in the utilization of low-grade thermal energy. In order to evaluate and compare the performances of three different constructions of thermally driven heat pump and heat transformer, the low-dissipation assumption has been adopted to establish the irreversible thermodynamic models of them in the present paper. By means of the proposed models, the heating loads, the coefficients of performance (COPs) and the optimal relations between them for various constructions are derived and discussed. The performances of different constructions are numerically assessed. More importantly, according to the results obtained, the upper and lower bounds of the COP at maximum heating load for different constructions are generated and compared by the introduction of a parameter measuring the deviation from the reversible limit of the system. Accordingly, the optimal constructions for the low-dissipation three-terminal heat pump and heat transformer are determined within the frame of low-dissipation assumption, respectively. The optimal constructions in accord with previous research and engineering practices for various three-terminal devices are obtained, which confirms the compatibility between the low-dissipation model and endoreversible model and highlights the validity of the application of low-dissipation model for multi-terminal thermodynamic devices. The proposed models and the significant results obtained enrich the theoretical thermodynamic model of thermally driven heat pump systems and may provide some useful guidelines for the design and operation of realistic thermally driven heat pump systems.

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Ling, Lowell, and Kai Man Chan. "Weaning adult patients with cardiogenic shock on veno-arterial extracorporeal membrane oxygenation by pump-controlled retrograde trial off." Perfusion 33, no. 5 (February 7, 2018): 339–45. http://dx.doi.org/10.1177/0267659118755888.

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Background: There is a lack of consensus on the timing of veno-arterial extracorporeal membrane oxygenation (VA-ECMO) liberation. VA-ECMO weaning usually consists of serial decrements until an idling flow is achieved, supported by echocardiographic and haemodynamic assessments. Even with minimal idling flow, right ventricular (RV) preload is reduced and, hence, right heart function is not fully tested under adequate loading conditions. Following the use of a novel technique called Pump Controlled Retrograde Trial Off (PCRTO) in neonate VA-ECMO weaning, we report the use of this technique in seven adult patients on VA-ECMO. Methods: We retrospectively reviewed all adult VA-ECMO patients treated at a tertiary teaching hospital in Hong Kong since 2010. Clinical data, including diagnosis, echocardiography findings, ECMO configuration, PCRTO settings, survival after veno-arterial ECMO (SAVE) score and outcomes, were collected. Mortality and death due to cardiac failure was compared between PCRTO and conventional weaning. Results: Seven patients underwent PCRTO, with a mean SAVE score of -4.4 ± 5.9. All seven patients were successfully decannulated without haemodynamic deterioration. In all cases, no clots or fibrin deposits were found in the circuit after the trial. There was no difference in mean SAVE scores among the seven patients in PCRTO and the 23 patients in the conventional group (-3.6, 95% CI -8.8 to 1.5). The number of deaths due to cardiac failure in the PCRTO group and the conventional group were 0 and 3, respectively (0% vs. 13%, p=0.99). Mortality after decannulation for PCRTO was 42.9% vs. conventional weaning 34.8% (p=0.99). Conclusion: Our study suggests that PCRTO is a simple, safe and reversible alternative weaning method. It may have a particular role in the assessment of patients who have marginal recovery and right heart failure. Prospective controlled studies are needed to establish the potential role of PCRTO in the liberation of patients from VA-ECMO support.

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Tatjewski, Piotr, Maciej Ławryńczuk, Piotr Marusak, Marian Rubik, Piotr Ziętek, Michał Szumski, and Maciej Szumski. "Design and construction of the controller for air-water heat pump: modeling of control plant." Pomiary Automatyka Robotyka 215, no. 1 (March 5, 2015): 21–28. http://dx.doi.org/10.14313/par_215/21.

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Peng, Bo, Na Zhu, Ping Fang Hu, Li Peng, and Fei Lei. "Study on Performance of Ground Source Heat Pump Systems Based on Site Tests." Advanced Materials Research 1008-1009 (August 2014): 226–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1008-1009.226.

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This study analyze the actual operation performance and energy efficiency of thirty-nine ground source heat pump (GSHP) systems based on site tests in Wuhan, China. These systems include ground couple heat pump (GCHP) systems, ground water heat pump (GWHP) systems and hybrid ground source heat pump (HGSHP) systems. The results show that energy-saving rates reach 30% for most of the systems using method recommended by Assessment Guideline. The coefficient of performance (COP) of the systems varies as follow: 2.6-4.85 for GCHP systems; 2.58-3.74 for GWHP systems; 2.66-5.67 for combined heat pump systems. According to the test results and system design data, analyses the factors affecting the system performance of three types of ground source heat pump systems.

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Wiekiera, Radosław. "Technical and Economic Analysis of the Use of Heat Pumps in a Public Facility." Civil and Environmental Engineering Reports 32, no. 4 (December 1, 2022): 376–88. http://dx.doi.org/10.2478/ceer-2022-0063.

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Abstract A heat pump uses natural energy from renewable sources such as air, ground or water. The pump, acquiring thermal energy from the environment (75%) and using electricity (25%), supplies it to the heated object. A heat pump-based system consists of a ground heat source (heat is taken from it), a heat pump unit and an upper heat source (heat is transferred to it). The refrigerant transfers heat from the lower heat source to the upper heat source. The paper discusses types of heat pumps in terms of the use of the lower heat source. A technical and economic analysis was carried out on the basis of two types of heat pump: air-to-water and ground-to-water A comparative analysis of the results obtained results will allow a real assessment of the system’s functioning.

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Sewastianik, Sara, and Andrzej Gajewski. "Ecological Analysis of Heat Pumps in Poland in Terms of Carbon Dioxide Emissions." Proceedings 51, no. 1 (October 14, 2020): 33. http://dx.doi.org/10.3390/proceedings2020051033.

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The purpose of this work is a comparison of indirect carbon dioxide emissions between the different heat pump types that operate in Polish climate conditions. This analysis embraces an air–water heat pump (ASHP), ground–water heat pump (GSHP), water–water heat pump (WSHP), and a WSHP with a separating heat exchanger (SHE) in the selected towns, one in each climatic zone in the country. The study starts from a computation of heat demand and electrical energy consumption in every hour of the heating season using temperature values taken from a typical meteorological year (TMY). Then, seasonal coefficient of performance (SCOP) values are determined, which enables an assessment of which kind of heat pump meets the European Union requirements in every location. Eventually, indirect CO2 emissions that are caused by electrical energy production are estimated for every heat pump in each location.

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Journal articles on the topic 'Heat Pump Controller Assessment'

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