scholarly journals Study on Performance Factors of Variable Frequency Heat Pump Water Heater

2015 ◽  
Author(s):  
Zhijiang Wu ◽  
Yansheng Xu ◽  
Xuewei Zhang
Keyword(s):  
Heat Pump ◽  
Variable Frequency ◽  
Water Heater ◽  
Performance Factors ◽  
Heat Pump Water Heater

scholarly journals Experimental Study of a Novel Direct-Expansion Variable Frequency Finned Solar/Air-Assisted Heat Pump Water Heater

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Jing Qin ◽  
Jie Ji ◽  
Wenzhu Huang ◽  
Hong Qin ◽  
Mawufemo Modjinou ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Ambient Temperature ◽  
Heat Pump ◽  
Operating Mode ◽  
Heating Time ◽  
Solar Irradiation ◽  
Variable Frequency ◽  
Direct Expansion ◽  
Water Heater ◽  
Heat Pump Water Heater

A novel direct expansion variable frequency finned solar/air-assisted heat pump water heater was fabricated and tested in the enthalpy difference lab with a solar simulator. A solar/air source evaporator-collector with an automatic lifting glass cover plate was installed on the system. The system could be operated in three modes, namely, air, solar, and dual modes. The effects of the ambient temperature, solar irradiation, compressor frequency, and operating mode on the performance of this system were studied in this paper. The experimental results show that the ambient temperature, solar irradiation, and operating mode almost have no effect on the energy consumption of the compressor. When the ambient temperature and the solar irradiation were increased, the COP was found to increase with decreasing heating time. Also, when the compressor frequency was increased, an increase in the energy consumption of the compressor and the heat gain of the evaporator were noted with a decrease in the heating time.

Exploration of an Efficient Control Rule Set of a Heat Pump Water Heater by Genetic Algorithms

2010 ◽  
Vol 130 (2) ◽  
pp. 194-200 ◽  
Author(s):  
Hidenori Komatsu ◽  
Ken-ichi Tokoro ◽  
Yasushi Sinohara
Keyword(s):  
Genetic Algorithms ◽  
Heat Pump ◽  
Water Heater ◽  
Control Rule ◽  
Heat Pump Water Heater ◽  
Efficient Control ◽  
Rule Set

Study Case of Utilization of Surplus Power of PV by Using Heat Pump Water Heater

2014 ◽  
Vol 134 (9) ◽  
pp. 1276-1281
Author(s):  
Eitaro Omine ◽  
Masahiro Asari ◽  
Hiromu Kobayashi
Keyword(s):  
Heat Pump ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Study Case ◽  
Surplus Power

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.

Comparison between reverse cycle and hot gas bypass defrosting methods in a transcritical CO2 heat pump water heater

2021 ◽  
pp. 117356
Author(s):  
Zuliang Ye ◽  
Yikai Wang ◽  
Xiang Yin ◽  
Yulong Song ◽  
Feng Cao
Keyword(s):  
Heat Pump ◽  
Water Heater ◽  
Hot Gas ◽  
Heat Pump Water Heater

Assessment of a heat pump water heater

1985 ◽  
Vol 9 (1) ◽  
pp. 77-89 ◽  
Author(s):  
J. A. Anderson ◽  
R. A. Bradford ◽  
C. G. Carrington
Keyword(s):  
Heat Pump ◽  
Water Heater ◽  
Heat Pump Water Heater

scholarly journals Heat-pipe enhanced solar-assisted heat pump water heater

Solar Energy ◽  
2005 ◽  
Vol 78 (3) ◽  
pp. 375-381 ◽  
Author(s):  
B.J. Huang ◽  
J.P. Lee ◽  
J.P. Chyng
Keyword(s):  
Heat Pipe ◽  
Heat Pump ◽  
Water Heater ◽  
Heat Pump Water Heater

scholarly journals Optimal energy control of grid tied PV–diesel–battery hybrid system powering heat pump water heater

Solar Energy ◽  
2015 ◽  
Vol 115 ◽  
pp. 243-254 ◽  
Author(s):  
Sam M. Sichilalu ◽  
Xiaohua Xia
Keyword(s):  
Heat Pump ◽  
Hybrid System ◽  
Water Heater ◽  
Energy Control ◽  
Optimal Energy ◽  
Heat Pump Water Heater
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