scholarly journals It Works—Long-Term Performance Measurement and Optimization of Six Ground Source Heat Pump Systems in Germany

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4691 ◽  
Author(s):  
Franziska Bockelmann ◽  
M. Norbert Fisch
Keyword(s):  
Heat Pump ◽  
Heat Exchangers ◽  
Control Strategies ◽  
Ground Source Heat Pump ◽  
Cooling Systems ◽  
Heating And Cooling ◽  
Ground Source ◽  
And Performance ◽  
Term Performance

Long-term studies of ground source heat pump (GSHP) heating and cooling systems for six different buildings (commercial, institutional and multi-family buildings) were conducted in Germany by Steinbeis-Innovationszentrum (SIZ) energy+. Three of them are equipped with borehole heat exchangers, and the others use energy piles as heat exchangers. This paper deals with a demonstration of the investigated buildings, the measured values and performance, and the obtained results include important findings and experiences, problems encountered and possible preventive measures to avoid mistakes. After ten years of operation, it can be stated that the systems work and achieve their planned efficiency but require constant control and regulation to avoid faulty operation. An analysis of the implemented control strategies shows that, for all these heating and cooling systems, holistically coordinated control strategies that are verified during commissioning are required.

Long term coupled simulation for ground source heat pump and underground heat exchangers

2015 ◽  
Vol 106 ◽  
pp. 13-22 ◽  
Author(s):  
Shuhong Li ◽  
Kefeng Dong ◽  
Jinyong Wang ◽  
Xiaosong Zhang
Keyword(s):  
Heat Pump ◽  
Heat Exchangers ◽  
Ground Source Heat Pump ◽  
Coupled Simulation ◽  
Ground Source

Study on the Ground-Source Heat Pump with Properties of Thermal Dynamics Used in Heating and Air Conditioning by Economic Analysis

2012 ◽  
Vol 252 ◽  
pp. 433-437
Author(s):  
Zhi Yang Yuan
Keyword(s):  
Economic Analysis ◽  
Heat Pump ◽  
Air Conditioning ◽  
Surface Soil ◽  
Ground Source Heat Pump ◽  
Thermal Dynamics ◽  
Air Conditioning System ◽  
Economic Competitiveness ◽  
Heating And Cooling ◽  
Ground Source

The ground-source heat pump is a system which takes the shallow surface soil energy as the source of heating and cooling. The temperature of ground source is relatively stable throughout the year, which makes the ground-source heat pump have the higher operation efficiency compared with the traditional air-conditioning system.Study on the ground-source heat pump with properties of thermal dynamics used in heating and air comditioning by ecomomic analysis is still an important issue. In this paper, the ground-source heat pump and the traditional heating and air-conditioning system have been compared in terms of their economic competitiveness. Firstly, it is required to compare the ground-source heat pump with the traditional heating method in terms of the heating economy. Afterwards, it is necessary to compare the ground-source heat pump with the conventional electric refrigeration in terms of the air-conditioning economy. Finally, it is needed to conduct the comprehensive and economic analysis for the ground-source heat pump and the boilers and air conditioning, which includes four programs.

Development and Challenges of Groundwater Heat Pump in China

2012 ◽  
Vol 193-194 ◽  
pp. 115-120
Author(s):  
Qing Gao ◽  
Xue Zhi Zhou ◽  
Xiao Wen Zhao ◽  
Chun Qiang Ma ◽  
Yu Ying Yan
Keyword(s):  
Heat Pump ◽  
Energy Transport ◽  
Control Strategies ◽  
Energy Utilization ◽  
Ground Source Heat Pump ◽  
Ground Source ◽  
Groundwater Environment ◽  
Groundwater Heat Pump ◽  
Over Exploitation ◽  
Direct Use

A groundwater heat pump (GWHP) is one type of ground source heat pump (GSHP) and is a major form of earth energy utilization, which can realize the direct use of groundwater energy or the reuse of stored underground energy. The energy conservation effect of GWHP plays an important role in the national energy strategy, but the groundwater environment has been affected and even damaged to some extent because of over-exploitation and unreasonable utilization. This paper reviews the development and challenges of GWHP in China and surveys the situation of groundwater utilization, which shows that lack of cognitive ability, scientific constraints and reasonable utilization may bring catastrophic damage to the groundwater. A coming work should aim to more researching basic problems, such as thermal interaction, energy transport in the well field, groundwater contamination, etc. In fact, the characteristics of unsteady and transient heat transfer in the complex underground environment, and their control strategies have been being also the most pressing problem. Their explorations and studies will strengthen the theoretical and practical understanding, and guide an orderly, healthy and sustainable development of GWHP.

scholarly journals Ground-Source Heat Pumps with Horizontal Heat Exchangers for Space Cooling in the Hot Tropical Climate of Thailand

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1274 ◽  
Author(s):  
Arif Widiatmojo ◽  
Sasimook Chokchai ◽  
Isao Takashima ◽  
Yohei Uchida ◽  
Kasumi Yasukawa ◽  
...  
Keyword(s):  
Economic Growth ◽  
Heat Pump ◽  
Heat Exchangers ◽  
Life Cycle Cost ◽  
Heat Pumps ◽  
Ground Source Heat Pump ◽  
Ground Source Heat Pumps ◽  
Air Source Heat Pump ◽  
Ground Source ◽  
Space Cooling

The cooling of spaces in tropical regions, such as Southeast Asia, consumes a lot of energy. Additionally, rapid population and economic growth are resulting in an increasing demand for space cooling. The ground-source heat pump has been proven a reliable, cost-effective, safe, and environmentally-friendly alternative for cooling and heating spaces in various countries. In tropical countries, the presumption that the ground-source heat pump may not provide better thermal performance than the normal air-source heat pump arises because the difference between ground and atmospheric temperatures is essentially low. This paper reports the potential use of a ground-source heat pump with horizontal heat exchangers in a tropical country—Thailand. Daily operational data of two ground-source heat pumps and an air-source heat pump during a two-month operation are analyzed and compared. Life cycle cost analysis and CO2 emission estimation are adopted to evaluate the economic value of ground-source heat pump investment and potential CO2 reduction through the use of ground-source heat pumps, in comparison with the case for air-source heat pumps. It was found that the ground-source heat pumps consume 17.1% and 18.4% less electricity than the air-source heat pump during this period. Local production of heat pumps and heat exchangers, as well as rapid regional economic growth, can be positive factors for future ground-source heat pump application, not only in Thailand but also southeast Asian countries.

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