scholarly journals Experimental Study on Automatic Switching of Solar Coupled Groundwater Source Heat Pump System

2021 ◽  
Vol 2095 (1) ◽  
pp. 012077
Author(s):  
Xiaoming Zhang ◽  
Qiang Wang ◽  
Qiujin Sun ◽  
Mingyu Shao
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Average Energy ◽  
Energy System ◽  
Hot Water ◽  
Efficiency Ratio ◽  
Pump System ◽  
Heat Pump System ◽  
Domestic Hot Water ◽  
Groundwater Source

Abstract There have been few practical applications of solar coupled groundwater source heat pump (GWHP) systems in large public buildings, and data on this technology are scarce. A solar coupled GWHP system was investigated in this study. The system uses an underground water source heat pump system for heating in winter, cooling in summer, and providing part of the domestic hot water, and it also uses a solar energy system to prepare domestic hot water. These two types of energy are complementary. The system was tested throughout the cooling season. This experiment ran from May 10, 2021, to September 10, 2021. The results show that the system can guarantee the indoor design temperature and the supply of domestic hot water. The solar water heating system operated for 1233 min in the summer; hot water (2334 m3) was prepared. During the summer, the average energy efficiency ratio of the GWHP unit was approximately 4.88. The energy efficiency ratio of the entire system was approximately 3.34. Such projects can play a key role in demonstrating this type of system.

Research on Compound Condensation/Evaporation of Four Functional Heat Pump Performance

2012 ◽  
Vol 517 ◽  
pp. 875-880
Author(s):  
Xiao Heng Zhang ◽  
Guang Cai Gong ◽  
Jian Yong Zhou
Keyword(s):  
Heat Pump ◽  
Hot Water ◽  
Final Conclusion ◽  
Full Account ◽  
Pump System ◽  
Heat Pump System ◽  
Domestic Hot Water ◽  
Explicit Analysis ◽  
Equipment Utilization ◽  
Technical Features

Compound condensing heat pump combines the advantages of heat pump technology and condensing heat recovery technology. It takes full account of the common infrastructure in the cooling and heat source system and greatly increases equipment utilization ratio. It also recycles condensing heat to produce sanitary hot water efficiently while ensuring cooling and heating of heat pump to achieve the same effect. The distinctive technical features of the compound condensation / evaporation of four functional heat pump ensure its efficient and reliable operation. This heat pump system runs in several models throughout the year,which include the refrigeration mode, refrigeration&domestic hot water mode, domestic hot water mode and heating mode. The performance in refrigeration mode and refrigeration&domestic hot water mode is studied by a designed experiment is done and the an explicit analysis is made. By comparing the results of simlation and experiment,an agreement can be shown clearly. Therefore,the final conclusion is drawn:the performance of compound condensation / evaporation of four functional heat pump is improved over the traditional heat pump.It is worthy to further promote for the sake of energy saving.

scholarly journals Performance assessment between a ground coupled and air source heat pump used for domestic hot water preparation

2019 ◽  
Vol 111 ◽  
pp. 06075
Author(s):  
Calin Sebarchievici
Keyword(s):  
Heat Pump ◽  
Simulation Models ◽  
Electrical Energy ◽  
Heat Pumps ◽  
Hot Water ◽  
Pump System ◽  
Heat Pump System ◽  
Domestic Hot Water ◽  
Air Source Heat Pump ◽  
Systems Simulation

A ground-coupled heat pump system (GCHP) and an air source heat pump (ASHP) driven by photovoltaic panels are used to provide domestic hot preparation for a NZEB house. The experimental measurements are used to test both the heat pump models in the same conditions of water temperature and volume of domestic hot water. A comparative analysis of the two heat pumps for domestic hot water preparation is performed. In addition, using the software TRNSYS (Transient Systems Simulation), two numerical simulation models of thermal and electrical energy consumption in DHW mode are developed. Finally, the simulations obtained using TRNSYS software are analysed and compared to the experimental data.

scholarly journals Study on the influence factors of energy efficiency ratio of low temperature air source heat pump

2020 ◽  
Vol 165 ◽  
pp. 01030
Author(s):  
Jin Hong-wen ◽  
Yang Lei ◽  
Song Bing-qi ◽  
Wu Yong-liang ◽  
Zhang Yan-peng
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Frequency Conversion ◽  
Efficiency Ratio ◽  
Theoretical Derivation ◽  
Pump System ◽  
Heat Pump System ◽  
Unit Energy ◽  
Heat Pump Unit ◽  
Position And Orientation

In this paper, through the experimental study of two heating seasons, it is found that the heat pump installation position and orientation, circulating pump work/frequency conversion, frosting conditions, etc. have a greater impact on the heat pump unit energy efficiency ratio. According to the actual operation data and theoretical derivation, the analysis shows that the energy efficiency ratio increases by 2.4% when the installation position and orientation increase the air temperature by 1K. The circulating water pump can save 78% of the power consumption in the period by changing the power frequency to frequency conversion. The frosting condition diagram can make a reasonable configuration and operation prediction for the heat pump system.

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