Design And Heating Performance Of Solar-Assisted Heat Pump Water Heater With Truncated-Cone-Type Evaporator

2010 ◽  
Author(s):  
Qing Lan ◽  
Ming Li ◽  
Chaofeng Xia ◽  
Xu Ji
Keyword(s):  
Heat Pump ◽  
Water Heater ◽  
Heating Performance ◽  
Heat Pump Water Heater ◽  
Truncated Cone ◽  
Cone Type

Theoretical investigation on the heating performance of a recuperative heat pump water heater using CO2/HCs with large temperature glides in cold regions

2021 ◽  
pp. 1-22
Author(s):  
Jielin Luo ◽  
Qin Wang ◽  
Zhen Zhao ◽  
Kaiyin Yang ◽  
Guangming Chen ◽  
...  
Keyword(s):  
Heat Pump ◽  
Temperature Difference ◽  
Hot Water ◽  
Large Temperature ◽  
Water Heater ◽  
Ambient Temperatures ◽  
Heating Performance ◽  
Heat Pump Water Heater ◽  
Vapor Injection ◽  
Injection Cycle

Abstract Considering the issues of environmental pollution and energy efficiency, heat pumps are gradually replacing traditional coal combustion for heating at low ambient temperatures. In this paper, eco-friendly CO2/HCs with large temperature glides are applied in a single-stage recuperative heat pump water heater. Its heating performance is theoretically investigated under the working condition of producing circulating hot water in typical winter of northern China, with medium temperature difference between supply/return water and large temperature difference between air inlet and water inlet. Due to its simple structure, low initial investment and high efficiency, its potential for producing circulating hot water is demonstrated. Exergy analyses are conducted to reveal the significant influence of the exergy losses of heat exchanger on system performance. For specified CO2/HC, optimal COP is obtained through global optimization of cycle pressures and mixture concentration. The heating performances of different CO2/HCs are compared, among which CO2/R600 and CO2/R600a behave better. Meanwhile, a typical vapor-injection cycle is used to demonstrate priorities on the heating performance of this recuperative cycle, in which the COP of recuperative cycle using CO2/R600 is more than 3.4% higher than that of the vapor-injection cycle. The results obtained in this paper provide a simple and efficient solution for producing circulating hot water at low ambient temperatures.

Effect of heat transfer area and refrigerant mass flux in a gas cooler on heating performance of air-source transcritical CO2 heat pump water heater system

2013 ◽  
Vol 67 ◽  
pp. 1-10 ◽  
Author(s):  
Shouguo Wang ◽  
Yongning He ◽  
Hanfei Tuo ◽  
Feng Cao ◽  
Ziwen Xing
Keyword(s):  
Heat Transfer ◽  
Heat Pump ◽  
Mass Flux ◽  
Heat Transfer Area ◽  
Water Heater ◽  
Heating Performance ◽  
Heat Pump Water Heater

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
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