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Pengxuan Wang, Yixi Wang, Weijun Gao, Tongyu Xu, Xindong Wei, Chunyan Shi, Zishu Qi and Li Bai
In cold regions, due o the impact of climatic conditions, the heat load in winter and the cooling load in summer are unbalanced. In the long-term operation of the ground-source heat pump (GSHP), the soil heat imbalance phenomenon has still not been succe...
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Mingxing Cao, Yimin Zhang and Tianfei Hu
This study aimed to investigate the practical applications of a ground source heat pump (GSHP) system for heating applications in embankment engineering. A special direct-expansion GSHP (DE-GSHP) was designed and manufactured, and its performance was exp...
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Filippo Busato, Renato Lazzarin and Marco Noro
In new and refurbished buildings, different energy sources are usually exploited to reach the Near Zero Energy Building target. Heat pumps and renewables are the most common adopted technologies. The coupling of the different components with a control lo...
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Yoshitaka Sakata, Takao Katsura and Katsunori Nagano
This study determined the required lengths of borehole heat exchangers (BHEs) in ground-source heat pump systems for heating/cooling a building (with 300 m2 of floor area) across Japan?s four main islands through a simulation approach. Hourly thermal loa...
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Yuanshen Lu, Kamel Hooman, Aleks D. Atrens and Hugh Russell
Ground source heat pumps (GSHPs) are one of the most widespread forms of geothermal energy technology. They utilise the near-constant temperature of the ground below the frost line to achieve energy-efficiencies two or three times that of conventional ai...
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Jin Luo, Joachim Rohn, Manfred Bayer and Anna Priess
Thermal efficiency of borehole heat exchangers (BHE) is of crucial importance for the design and optimization of ground source heat pump (GSHP) system. This paper investigates thermal efficiency of a BHE with three drillhole diameters: 121 mm, 165 mm and...
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Yong-Dae Jeong, Min Gyung Yu and Yujin Nam
Renewable energy systems have received a lot of attention as sustainable technology in building sector. However, the efficiency of the renewable energy systems depends on the surrounding conditions, and it could gradually decrease by excessive and long-t...
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Jae-Ki Byun, Dong-Hwa Jeong, Young-Don Choi and Jong-Keun Shin
In the present study, a fuel cell driven ground source heat pump (GSHP) system is applied in a community building and heat pump system performance is analyzed by computational methods. Conduction heat transfer between the brine pipe and ground is analyze...
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Renato Lazzarin, Marco Noro, Giulia Righetti and Simone Mancin
The use of phase change materials (PCM) can be considered an effective way to improve the energy storage capabilities of hybrid water thermal energy storage (TESs) in solar heating and cooling plants. However, due to a few shortcomings, their use is stil...
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Eun-Chul Kang, Euy-Joon Lee, Mohamed Ghorab, Libing Yang, Evgueniy Entchev, Kwang-Seob Lee and Nam-Jin Lyu
Micro polygeneration utilizing renewable energy is a suitable approach to reduce energy consumption and carbon emission by offering high-efficiency performance, offsetting the need for centrally-generated grid electricity and avoiding transmission/distri...
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Paolo Maria Congedo, Caterina Lorusso, Maria Grazia De Giorgi and Domenico Laforgia
In order to satisfy the requirements of Directive 2010/31/EU for Zero Energy Buildings (ZEB), innovative solutions were investigated for building HVAC systems. Horizontal air-ground heat exchangers (HAGHE) offer a significant contribution in reducing ene...
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Shohei Kaneko, Youhei Uchida, Gaurav Shrestha, Takeshi Ishihara and Mayumi Yoshioka
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Chan-Joong Kim, Taehoon Hong, Jimin Kim, Daeho Kim and Dong-yeon Seo
The excessive use of fossil fuels has led to global warming and air pollution. To solve these problems, interest in new renewable energy system (NRE system) has increased in recent years. In particular, photovoltaic, solar thermal heating, fuel cell and ...
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Asim Balbay, Mehmet Esen
Pág. 677 - 685
Temperature distribution which occurs in pavement and bridge slabs heated for de-icing and snow melting during cold periods is determined by using vertical ground-source heat pump (GSHP) systems with U-tube ground heat exchanger (GHE). The bridge and pav...
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Matteo Dongellini, Christian Natale, Claudia Naldi, Eugenia Rossi di Schio, Paolo Valdiserri and Gian Luca Morini
An energy and environmental performance analysis of air-source and ground-source heat pump systems able to operate with traditional (R-410A) and alternative low-GWP (R-454B) refrigerants is conducted. The case study is composed of an existing residential...
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Adel Eswiasi and Phalguni Mukhopadhyaya
Use of ground source heat pumps has increased significantly in recent years for space heating and cooling of residential houses and commercial buildings, in both heating (i.e., cold region) and cooling (i.e., warm region) dominated climates, due to its l...
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Jeong-Heum Cho, Yujin Nam and Hyoung-Chan Kim
Deep geothermal heat pump systems have considerable energy saving potential for heating and cooling systems that use stable ground temperature and groundwater as their heat sources. However, deep geothermal systems have several limitations for real appli...
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Mohamed Ghorab, Libing Yang, Evgueniy Entchev, Euy-Joon Lee, Eun-Chul Kang, Yu-Jin Kim, Sangmu Bae, Yujin Nam and Kwonye Kim
Hybrid renewable energy systems are subject to extensive research around the world and different designs have found their way to the market and have been commercialized. These systems usually employ multiple components, both renewable and conventional, c...
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Yoshitaka Sakata, Takao Katsura, Katsunori Nagano and Manabu Ishizuka
Heat advection caused by groundwater flow can potentially improve the performance of a borehole heat exchanger. However, the required flow velocity is not achieved under most natural conditions. This study focuses on artificial groundwater flow generated...
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