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A Case Study of Shallow Geothermal Heating and Cooling - The Application of Single-Well Circulation Heat Exchange Geothermal Energy Acquisition Technology In Haidian Foreign Language School In Beijing and Hebei Campus
Invented by Ever Source Technology Development Co. Ltd., the “single-well circulation heat exchange geothermal energy acquisition technology” is a way to efficiently and safely collect shallow geothermal energy to provide stable heat source for buildings. This paper introduces the achievements of the applications of this technology in Beijing Haidian Foreign Language School, an endeavor which has lasted for more than 20 years as construction and utilization areas in different periods and places has increased over time. Under the guidance of Academician Wang Jiyang, the case study of the first phase of the project was presented in "Shallow Geothermal Resource Utilization: A Case Study of Single Well Pumping and Irrigation Technology" by Shengheng Xu and Ladislaus Rybach at the 2003 World Geothermal Congress. This essay is a continuation of this literature, focusing on the expansion of the application in the school’s new campus beginning 2019, located in the Zhangjiakou area of Hebei Province, where the Beijing Winter Olympic Games is held. To meet the heating and cooling requirements of the 140,000 square-meter new campus, which includes several winter sports venues, year-round supply of domestic hot water, much improvements has been made, and the utilization rate of renewable energy has reached more than 60%, with reduction emission of carbon dioxide exceeding 800 tons per annum. This is the same client who has continuously selected "single well circulation heat exchange geothermal energy acquisition technology" in different construction projects for more than 20 years, for this technology uses renewable shallow geothermal energy for heating, which does not consume and pollute groundwater and achieves zero carbon emission in the region. According to the building and functional characteristics of the campus as well as the regional climate characteristics, the system is set as a water-ring heat pump system with scattered collection of shallow geothermal energy, centralized transportation, and distributed setting of cold and heat source stations, which not only realizes zero pollution and zero emissions, but also further realizes energy saving of the system. Using the surface as a solar energy receiver, the land as a seasonal energy accumulator, realizing heat energy storage in summer and use in winter, achieving high energy efficiency ratio operations in both heating and refrigeration. With "Shallow Earth Energy Resource Utilization -- A Case Study of Single Well Pumping and Irrigation Technology" winning the best essay award of the World Conference that year, it has attracted much attention from experts in the industry who have reached out to investigate and study this technology. This paper summarizes and provides relevant answers to the real-life applications of the system's continuous and stable operations from 2001 to current times. It is evidenced that the shallow geothermal heat pump system is reliable, simple and reproducible and has wide adaptability, which is a optimal technological solution in the achievement of the double goals of "carbon emission reduction and carbon peak" in the field of building heating.