A verification study on saving energy cost and reducing CO2 emission with large-scale geothermal heat pump systems in Korea

作者：Park Byeong Hak^*; Kim Hyoung Soo; Lee Kang Kun

来源：Journal of Renewable and Sustainable Energy, 2013, 5(5): 052009.

DOI：10.1063/1.4824983

This paper presents economic and environmental effects by using monitoring data collected over a 2-yr period in geothermal heating and cooling facilities in Jungwon University, Korea. The facility has heating capacity of 7045kW and cooling capacity of 5947 kW. Such monitoring data are rarely reported in the literature; thus, the evaluation based on long-term operational data will contribute greatly to the objective assessment of the geothermal heat pump system (GHPS) as a renewable energy resource. The effects of relative energy cost saving and reductions in CO2 emission were predicted for comparison with conventional heating and cooling systems. The GHPS was estimated to reduce energy costs by 76.4%-85.3% and yield a reduction of CO2 emission of 398-595 tons annually. We also conducted an economic analysis using the benefit/cost ratio (BCR) method according to scenarios in which the lifespan and discount rate for the GHPS were varied. Since the BCR for the GHPS was in the range of 1.99-3.58 (case 1) and 1.67-3.01 (case 2), GHPS is considered to be more economic than other types of heating and cooling systems. These results provide evidentiary data to help overcome skepticism over the applicability of large-scale GHPSs.

• 出版日期2013-9