scholarly journals Study on Temperature Field of Buried Heat Exchanger in a Residential District

2019 ◽  
Vol 136 ◽  
pp. 01045
Author(s):  
WANG Kai ◽  
MIN Jie ◽  
SHENG Xuelei ◽  
WANG Haitao
Keyword(s):  
Temperature Field ◽  
Soil Temperature ◽  
Heat Pump ◽  
Residential Buildings ◽  
Engineering Application ◽  
Stable Operation ◽  
Buried Pipe ◽  
Pump System ◽  
Heat Pump System ◽  
Residential District

The long-term stable operation of soil source heat pump system depends on the recovery characteristics of soil temperature field. Using DEST-h model of Hefei a high-rise residential buildings and FLUENT software to simulate software of soil source heat pump are analyzed through the summer and autumn season recovery after the change of soil temperature field around the buried pipe. It is pointed out that the intermittent operation of the compensation tower soil-coupled heat pump is beneficial to promote the recovery of soil temperature field. It has certain engineering application value for the improvement of soil source heat pump performance in hot summer and cold winter area.

Study on Ground Source Heat Pump System of Combined Office and Residential Building in Hot Summer and Warm Winter Region

2013 ◽  
Vol 732-733 ◽  
pp. 564-570 ◽  
Author(s):  
Ying Ning Hu ◽  
Ya Zhao Liu ◽  
Jun Lin ◽  
Yan Wang
Keyword(s):  
Heat Pump ◽  
Heat Balance ◽  
System Performance ◽  
Residential Buildings ◽  
Residential Building ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Warm Winter ◽  
Ground Source

A ground source heat pump system of combined office and residential buildings in hot summer and warm winter region is introduced. The system performance is studied through the experiment, and the performance of underground heat balance is analyzed by TRNSYS. The results show the superiority and applicability of the ground source heat pump system.

scholarly journals Designing and Optimizing Heat Storage of a Solar-Assisted Ground Source Heat Pump System in China

2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
Yan Gao ◽  
Zhi Sun ◽  
Xinxing Lin ◽  
Chuang Wang ◽  
Zongyu Sun ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Heat Pump ◽  
Solar Collector ◽  
Heat Storage ◽  
Ground Source Heat Pump ◽  
Cold Region ◽  
Annual Average ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

The cold accumulation problem can lead to performance degradation of heat pumps. This paper presents the design and optimization of a solar-assisted storage system to solve this issue. A ground source heat pump (GSHP) project was established using the transient system simulation program (TRNSYS) based on a ground heat exchange theoretical model, which was validated by a previously established experiment in Beijing. The Beijing, Harbin, and Zhengzhou regions were used in numerical simulations to represent three typical cities where buildings require space heating (a cold region, a severe cold region, and a hot summer and cold winter region, respectively). System performance was simulated over periods of ten years. The simulation results showed that the imbalance efficiencies in the Beijing, Harbin, and Zhengzhou regions are 55%, 79%, and 38%, respectively. The annual average soil temperature decreases 7.3°C, 11.0°C, and 5.3°C during ten years of conventional GSHP operation in the Beijing, Harbin, and Zhengzhou regions, respectively. Because of the soil temperature decrease, the minimum heating coefficient of performance (COP) values decrease by 23%, 46%, and 11% over the ten years for GSHP operation in these three regions, respectively. Moreover, the simulation data show that the soil temperature would still be decreasing if based on the previous solar energy area calculation method. Design parameters such as the solar collector size are optimized for the building load and average soil temperature in various cold regions. Long-term operation will test the matching rate of the compensation system with the conventional GSHP system. After the system is optimized, the solar collector area increases of 20% in the Beijing region, 25% in the Harbin region, and 15% in the Zhengzhou region could help to maintain the annual average soil temperature balance. The optimized system could maintain a higher annual average COP because of the steady soil temperature. It provides a method for the design of a solar collector area which needs to be determined in the seasonal heat storage solar ground source heat pump system.

scholarly journals Experimental performance analysis of a multiple-source and multiple-use heat pump system: winter field experiment and heating operation performance evaluation

2019 ◽  
Vol 111 ◽  
pp. 01076 ◽  
Author(s):  
Mingzhe Liu ◽  
Ryozo Ooka ◽  
Toshiyuki Hino ◽  
Ke Wen ◽  
Wonjun Choi ◽  
...  
Keyword(s):  
Field Experiment ◽  
Heat Pump ◽  
System Performance ◽  
Multiple Source ◽  
Stable Operation ◽  
Multiple Use ◽  
Operation Performance ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling

We herein report the development of a distributed heat pump system that can utilize a variety of renewable energy sources to meet different building heating and cooling demands (i.e., a multiple source and multiple use heat pump system, MMHP). In this system, a water circulating loop is used to connect ground heat exchangers, a unique sky-source heat pump, and various heat pumps for heating and cooling purposes to form a thermal network within a building. This distribution increases the flexibility of the system and allows an improved matching of supply and demand. To evaluate the system performance, an experimental house was constructed, and a winter field experiment was conducted. We found that the reported heat pump for floor heating achieved a stable operation with a high coefficient of performance of ~11.5, while the heat collecting operation performance of the sky-source heat pump varied significantly depending on the amount of solar radiation and the outside air temperature. Finally, since the sky-source heat pump contributes to an improvement in the whole system performance, it appears that there is still room for improved regarding the whole system performance by adjusting the operating and control strategy.

Application Analysis of Pile Foundation Ground Source Heat Pump System

2013 ◽  
Vol 448-453 ◽  
pp. 2839-2842 ◽  
Author(s):  
Yun Zhun Fu ◽  
Xin Hui Du ◽  
Xu Zhang
Keyword(s):  
Heat Pump ◽  
Pile Foundation ◽  
Air Conditioning ◽  
Test Method ◽  
Buried Pipe ◽  
Pump System ◽  
Air Conditioning System ◽  
Heat Pump System ◽  
Advantages And Disadvantages ◽  
Pipe Heat

Pile foundation thermal response test method was adopted to measure the heat transfer capacity of the pile foundation U-pipe heat exchanger. The heat pump system of pile foundation buried pipe was designed. BIN method was adopted to calculate the annual dynamic load of office in Shanghai and annual energy consumption, and its energy-saving effect was determined by comparing with the air-cooled heat pump air conditioning system. Finally, annual cost method was employed to study the investment and annual operating expenses of pile foundation buried pipe heat pump air conditioner systems, and their economy, advantages and disadvantages by comparing with those of the air-cooled heat pump air conditioning system were analyzed.

scholarly journals Modeling study of ground source heat pump system based on the dynamic load of underground engineering

2020 ◽  
Vol 182 ◽  
pp. 03004
Author(s):  
Jintian Li ◽  
Yunzhe Ji ◽  
Bo Wang ◽  
Ling Xie
Keyword(s):  
Soil Temperature ◽  
Heat Pump ◽  
Dynamic Load ◽  
Operating Conditions ◽  
Ground Source Heat Pump ◽  
Operating Characteristics ◽  
Underground Engineering ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

The load properties of underground engineering have an important influence on operating characteristics of ground source heat pump system. It has important reference value for design and operation management that Simulation analyzing operating conditions of ground source heat pump system under dynamic load conditions. It took an underground engineering as an example for dynamic load calculation in the paper, and simulated operating characteristics of ground source heat pump system under three operating conditions. The calculation results show that the engineering maintenance and management period is conducive to the recovery of soil temperature, and it improves the COP value of the unit. Some measures should be taken to restore soil temperature for long-term continuous operation of underground engineering. The use of heat recovery to make domestic hot water can relieve the problem of soil thermal imbalance to some extent. It is beneficial to improve heat pump unit performance.

Evaluating heat pump system design methods towards a sustainable heat supply in residential buildings

2022 ◽  
Vol 308 ◽  
pp. 118204
Author(s):  
Christian Vering ◽  
Laura Maier ◽  
Katharina Breuer ◽  
Hannah Krützfeldt ◽  
Rita Streblow ◽  
...  
Keyword(s):  
System Design ◽  
Heat Pump ◽  
Heat Supply ◽  
Residential Buildings ◽  
Design Methods ◽  
Pump System ◽  
Heat Pump System
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