An Experimental and Numerical Case Study of Passive Building Cooling with Foundation Pile Heat Exchangers in Denmark

被引:10
作者
Poulsen, Soren Erbs [1 ]
Alberdi-Pagola, Maria [2 ]
Cerra, Davide [3 ]
Magrini, Anna [3 ]
机构
[1] VIA Univ Coll, R&D Ctr Bldg Energy Water & Climate, DK-8700 Horsens, Denmark
[2] Ctr Paele AS, Gronlandsvej 96, DK-7100 Vejle, Denmark
[3] Univ Pavia, Dept Civil Engn & Architecture, I-27100 Pavia, Italy
关键词
passive cooling; shallow geothermal systems; ground source heat pumps; thermal comfort; indoor climate; energy efficiency; renewable energy;
D O I
10.3390/en12142697
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Technologies for energy-efficient cooling of buildings are in high demand due to the heavy CO2 footprint of traditional air conditioning methods. The ground source heat pump system (GSHP) installed at the Rosborg Gymnasium in Vejle (Denmark) uses foundation pile heat exchangers (energy piles). Although designed for passive cooling, the GSHP is used exclusively for heating. In a five-week test during the summer of 2018, excess building heat was rejected passively to the energy piles and the ground. Measured energy efficiency ratios are 24-36 and the thermal comfort in conditioned rooms is improved significantly relative to unconditioned reference rooms. A simple model relating the available cooling power to conditioned room and ground temperatures is developed and calibrated to measured test data. Building energy simulation based estimates of the total cooling demand of the building are then compared to corresponding model calculations of the available cooling capacity. The comparison shows that passive cooling is able to meet the cooling demand of Rosborg Gymnasium except for 7-17 h per year, given that room temperatures are constrained to < 26 degrees C. The case study clearly demonstrates the potential for increasing thermal comfort during summer with highly efficient passive cooling by rejecting excess building heat to the ground.
引用
收藏
页数:18
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