Study on Performance of Ground Source Heat Pump Systems Based on Site Tests

2014 ◽  
Vol 1008-1009 ◽  
pp. 226-230 ◽  
Author(s):  
Bo Peng ◽  
Na Zhu ◽  
Ping Fang Hu ◽  
Li Peng ◽  
Fei Lei
Keyword(s):  
Heat Pump ◽  
Coefficient Of Performance ◽  
Ground Source Heat Pump ◽  
Test Results ◽  
Operation Performance ◽  
Design Data ◽  
Factors Affecting ◽  
Ground Source ◽  
Actual Operation ◽  
Saving Rates

This study analyze the actual operation performance and energy efficiency of thirty-nine ground source heat pump (GSHP) systems based on site tests in Wuhan, China. These systems include ground couple heat pump (GCHP) systems, ground water heat pump (GWHP) systems and hybrid ground source heat pump (HGSHP) systems. The results show that energy-saving rates reach 30% for most of the systems using method recommended by Assessment Guideline. The coefficient of performance (COP) of the systems varies as follow: 2.6-4.85 for GCHP systems; 2.58-3.74 for GWHP systems; 2.66-5.67 for combined heat pump systems. According to the test results and system design data, analyses the factors affecting the system performance of three types of ground source heat pump systems.

An analysis of the factors affecting hybrid ground-source heat pump installation potential in North America

2014 ◽  
Vol 125 ◽  
pp. 28-38 ◽  
Author(s):  
Hiep V. Nguyen ◽  
Ying Lam E. Law ◽  
Masih Alavy ◽  
Philip R. Walsh ◽  
Wey H. Leong ◽  
...  
Keyword(s):  
North America ◽  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Factors Affecting ◽  
Ground Source

Ground-Source Heat Pump Performance Analysis Based on Building-Integrated Renewable Energy Demonstration Projects

2011 ◽  
Vol 354-355 ◽  
pp. 766-772
Author(s):  
Chun Ni Yao ◽  
Bin Hao
Keyword(s):  
Renewable Energy ◽  
Heat Pump ◽  
Research Area ◽  
Ground Source Heat Pump ◽  
Test Results ◽  
Application Area ◽  
Large Area ◽  
The Past ◽  
Ground Source ◽  
Low Global Warming Potential

Renewable energy, which is drawing more and more attentions in low global warming potential research area, has been applied in a large area of China for the past decade. In 2004, the overall application area of ground-source heat pump (GSHP) as a typical renewable energy is less than 8 million m2, while the overall application area increased dramatically to 100 million m2 till 2009. The present work did an in-depth research of coefficient of system performance (COPs) of GSHP based on the test results of around 70 building-integrated applications over 5 million m2. After comparison of different cool/heat source types and analysis of the collected existing application problems, the present paper provides some suggestions on the sustainable application of GSHP in China.

Annual pattern of the coefficient of performance considering several heat pump types and its environmental consequences

2014 ◽  
Vol 5 (2) ◽  
pp. 173-179
Author(s):  
T. Buday ◽  
Gy. Szabó ◽  
I. Fazekas ◽  
M. Paládi ◽  
Sz. Szabó ◽  
...  
Keyword(s):  
Heat Pump ◽  
Water Source ◽  
Heat Pumps ◽  
Coefficient Of Performance ◽  
Conventional Heating ◽  
Temperature Pattern ◽  
Ground Source Heat Pump ◽  
Environmental Consequences ◽  
Ground Source ◽  
Heating Mode

Heating with the use of ambient energy by heat pumps is a very effective way to reduce CO2 emission. However, efficiency, economic and environmental advantages depend on the type of the heat pump and the temperature of the source, the latter usually changes during the heating season. The aim of the paper is to give the annual pattern of the COP and emission as a function of the typical source temperature pattern, moreover yearly summarized energetic and emission values are also added in the case of air source, water source and ground source heat pump systems, compared to some conventional heating mode.

Analysis of influence of pipe group arrangement and heat exchanger type on operation performance of the ground source heat pump

Geothermics ◽  
2021 ◽  
Vol 97 ◽  
pp. 102237
Author(s):  
Hongzhi Zhang ◽  
Zongwei Han ◽  
Mingzhen Ji ◽  
Gui Li ◽  
Xinlu Cheng ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Operation Performance ◽  
Ground Source

Exergetic Optimization of Generated Electric Power Split in a Heat Pump Coupled Poly-Generation System

2007 ◽  
Author(s):  
Birol I. Kilkis ◽  
Siir Kilkis
Keyword(s):  
Heat Pump ◽  
Energy Savings ◽  
Primary Energy ◽  
Coefficient Of Performance ◽  
Base System ◽  
Ground Source Heat Pump ◽  
The European Union ◽  
Generation System ◽  
Practical Applications ◽  
Ground Source

This study analyzes environmental, energy, and economical benefits of a ground source heat pump coupled poly-generation system by incorporating exergy into the energy efficiency analysis. Two additional terms, namely the rational exergy efficiency and the coefficient of performance were introduced to the primary energy savings equation in the European Union Directive 2004/8/EC. Based on the new equation, an optimization algorithm was developed, which can quantify the environmental, energy and economy benefits of any poly-generation system in a broader extent and scope. This algorithm was used to investigate the factors affecting the optimum split of the power generated by a poly-generation system between the heat pump and the customer. A base system was analyzed, which consists of a ground-source heat pump (GSHP) and a combined heat and power (CHP) system. Results show that any increase in the split in favor of the heat pump boosts the primary energy savings potential and thus CO2 emissions reducing potential while the pay-back period of the system is reduced. When all the constraints, including electricity and fuel costs in the energy market are taken into account, a one-to-three split seems to be optimal for many practical applications. It is concluded that benefits of CHP may be enhanced by GSHP coupling pending a careful exergy balance analysis between the resource supply and the application demand. This paper provides the fundamentals of the algorithm and discusses that a win-win-win situation among the environment, energy, and economy is feasible, most importantly, from the global warming perspective.

Design and Performance of a Constant Temperature and Humidity Air-Conditioning System Driven by a Ground Source Heat Pump in Summer

2010 ◽  
Vol 2 (1) ◽  
Author(s):  
X. Yu ◽  
X. Q. Zhai ◽  
R. Z. Wang
Keyword(s):  
Heat Pump ◽  
Constant Temperature ◽  
Air Conditioning ◽  
Weather Condition ◽  
Coefficient Of Performance ◽  
Heat Extraction ◽  
Ground Source Heat Pump ◽  
Air Conditioning System ◽  
Ground Source ◽  
Temperature And Humidity

A constant temperature and humidity air-conditioning system driven by a ground source heat pump was designed and constructed in an archives building in Shanghai. The system consists of a water-to-water heat pump and 280 boreholes with 80 m in depth. During the operation in summer, the heat extraction from the condenser of the heat pump was divided: Part was rejected to the soil, while another was used to reheat the air in air handling units (AHUs). According to the experimental results under a typical summer weather condition of Shanghai, the average coefficient of performance of the heat pump was 5.4. The average indoor temperature and relative humidity of the archives house were 22.8°C and 46.6%, respectively. Since part of the heat extraction from the condenser was used to reheat the air in AHUs, the heat rejected to the soil was reduced by 23%, which was helpful for the earth energy conservation. According to the theoretical analysis, the distance between two boreholes is suggested to be 4–5 m. The deepness of the boreholes is suggested to be 80–100 m in Shanghai.

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