Optimal combination of capillary tube geometry and refrigerant charge on a small CO2 water-source heat pump water heater

2018 ◽  
Vol 88 ◽  
pp. 626-636 ◽  
Author(s):  
Dong Wang ◽  
Yuehong Lu ◽  
Leren Tao
Keyword(s):  
Heat Pump ◽  
Capillary Tube ◽  
Water Source ◽  
Optimal Combination ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Tube Geometry

scholarly journals Experimental Research of a Water-Source Heat Pump Water Heater System

Energies ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 1205 ◽  
Author(s):  
Zhongchao Zhao ◽  
Yanrui Zhang ◽  
Haojun Mi ◽  
Yimeng Zhou ◽  
Yong Zhang
Keyword(s):  
Heat Pump ◽  
Experimental Research ◽  
Water Source ◽  
Water Heater ◽  
Heat Pump Water Heater

scholarly journals Experimental Study on the Performance of Water Source Trans-Critical CO2 Heat Pump Water Heater

Energies ◽  
2017 ◽  
Vol 10 (6) ◽  
pp. 810 ◽  
Author(s):  
Xiufang Liu ◽  
Changhai Liu ◽  
Ze Zhang ◽  
Liang Chen ◽  
Yu Hou
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
Water Source ◽  
Water Heater ◽  
Heat Pump Water Heater

Experimental Investigation of a Multifunctional Solar Assisted Heat Pump in Space Cooling Integrated Water Heating Mode and Space Cooling only Mode

2011 ◽  
Vol 80-81 ◽  
pp. 904-908
Author(s):  
Ai Guo Jiang ◽  
Xiao Zhong Wang
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Water Source ◽  
Efficiency Ratio ◽  
Water Heating ◽  
Water Heater ◽  
Operating Modes ◽  
Heat Pump Water Heater ◽  
Space Cooling ◽  
Heating Mode

A prototype of a Multifunctional Solar Assisted Heat Pump (MSAHP) system is designed in the study. The system integrates a heat pump water heater, a conventional air-conditioning unit and a solar water heater, and takes advantage of their multiple functions in terms of solar and heat pump water heating, space cooling only, space cooling integrated water heating, and air-source/water-source heat pump space heating. The principle and different operating modes of the system are presented. The experimental study of the prototype of the MSAHP in the space cooling integrated water heating mode was conducted. The results indicate that the combined energy efficiency ratio (EERc) of the system fluctuated between 3.39 and 6.20 in this mode. Experiment was also conducted to test the relevant performance functions of the system in the space cooling only mode. The results show that the energy efficiency ratio (EER) of space cooling only mode is 2.61.

scholarly journals The Influence of Internal Heat Exchanger on the Performance of Transcritical CO2 Water Source Heat Pump Water Heater

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1787
Author(s):  
Fan Feng ◽  
Ze Zhang ◽  
Xiufang Liu ◽  
Changhai Liu ◽  
Yu Hou
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Internal Heat ◽  
Water Source ◽  
Hot Water ◽  
Operational Performance ◽  
Water Heater ◽  
Source Temperature ◽  
Internal Heat Exchanger ◽  
Heat Pump Water Heater

The characteristics of the transcritical CO2 heat pump water heater (HPWH) system are; a lower inlet hot water temperature (Ti-hw) (sometimes this is lower than the water source temperature), and an outlet gas cooler temperature (To-gc) which is affected by the Ti-hw and often lower than the critical temperature. In order to study the effects of the internal heat exchanger (IHX) on the operational performance of the transcritical CO2 HPWH when To-gc is low, a transcritical CO2 water source HPWH experiment platform is established to conduct experimental research and comparative analysis on the operational performance of the transcritical CO2 water source HPWH, with or without IHX. It is found that, if only the coefficient of performance (COP) and heating at the optimal exhaust pressure of the transcritical CO2 water source HPWH were considered, COP and the heating of the non-IHX system would be slightly higher than those of the IHX system at the lower hot water flow and water source temperature, and this increase was not obvious. At the higher hot water flow rate and water source temperature, COP and the heating of the non-IHX system were also higher than those of the IHX system, and the increase was obvious. The experiment results showed that, near the optimal exhaust pressure, the variation range of COP and heating of the IHX system is relatively small, and the system has a relatively high stability.

Research and development of an air-cycle heat-pump water heater. Final report

1979 ◽  
Author(s):  
J.T. Dieckmann ◽  
A.J. Erickson ◽  
A.C. Harvey ◽  
W.M. Toscano
Keyword(s):  
Research And Development ◽  
Heat Pump ◽  
Final Report ◽  
Water Heater ◽  
Heat Pump Water Heater

Numerical analysis of the heat pump water heater with immersed helically coiled tubes

2021 ◽  
Vol 39 ◽  
pp. 102547
Author(s):  
Sami Missaoui ◽  
Zied Driss ◽  
Romdhane Ben Slama ◽  
Bechir Chaouachi
Keyword(s):  
Numerical Analysis ◽  
Heat Pump ◽  
Water Heater ◽  
Heat Pump Water Heater

Energy Consumption Modeling of a Heat Pump System for Combined Space Conditioning and Residential Water Heating in a Typical Household in Quito, Ecuador

2016 ◽  
Author(s):  
Gabriel Agila ◽  
Guillermo Soriano
Keyword(s):  
Energy Consumption ◽  
Heat Pump ◽  
Thermal Storage ◽  
Hot Water ◽  
Water Heating ◽  
Water Heater ◽  
Pump System ◽  
Detailed Model ◽  
Heat Pump Water Heater ◽  
Residential Water

This research develops a detailed model for a Water to Water Heat Pump Water Heater (HPWH), operating for heating and cooling simultaneously, using two water storage tanks as thermal deposits. The primary function of the system is to produce useful heat for domestic hot water services according to the thermal requirements for an average household (two adults and one child) in the city of Quito, Ecuador. The purpose of the project is to analyze the technical and economic feasibility of implementing thermal storage and heat pump technology to provide efficient thermal services and reduce energy consumption; as well as environmental impacts associated with conventional systems for residential water heating. An energy simulation using TRNSYS 17 is carried to evaluate model operation for one year. The purpose of the simulation is to assess and quantifies the performance, energy consumption and potential savings of integrating heat pump systems with thermal energy storage technology, as well as determines the main parameter affecting the efficiency of the system. Finally, a comparative analysis based on annual energy consumption for different ways to produce hot water is conducted. Five alternatives were examined: (1) electric storage water heater; (2) gas fired water heater; (3) solar water heater; (4) air source heat pump water heater; and (5) a heat pump water heater integrated with thermal storage.

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