JpGU-AGU Joint Meeting 2017

講演情報

[JJ] ポスター発表

セッション記号 A (大気水圏科学) » A-HW 水文・陸水・地下水学・水環境

[A-HW36] [JJ] 都市域の水環境と地質

2017年5月20日(土) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:林 武司(秋田大学教育文化学部)、西田 継(山梨大学大学院総合研究部国際流域環境研究センター)、鈴木 弘明(日本工営株式会社 中央研究所 総合技術開発部)、浅田 素之(清水建設株式会社 技術研究所)

[AHW36-P06] Case investigation of the efficiency degradation of open loop geothermal cooling and heating system(OLGCHS) in Korea

Byeong Ho Lee1Kyeong Hwan Bae1Tae Hyeon Kim1、*Lee Bo Hee1Nam Ju Kim2 (1.Korea Groundwater and Geothermal energy Association、2.Geo Engineering Co. Ltd)

キーワード:open loop geothermal cooling and heating system(OLGCHS), efficiency degradation, hydrogeological properties

This study was conducted to improve energy efficiency of open loop geothermal cooling and heating system (OLGCHS) showing low energy efficiency. When OLGCHS were installed, hydrogeological properties and groundwater yield were not considered. Therefore, various problems such as groundwater depletion, circulatory disturbance of groundwater, groundwater overflow, clogging by materials, and decrease of energy efficiency occur in many facilities which OLGCHS was installed and maintenance is very difficult. These circumstances have a negative influence on the spread of the OLGCHS in Korea. However, there is no proper investigation and cause analysis to solve the above problems. In this study, an advanced standing column well(SCW) was developed. In advanced SCW, wells used in OLGCHS are arranged in a row and these wells are connected using pipeline. Therefore, well depth was reduced and groundwater circulation was improved in the advanced SCW compared to a common SCW. In addition, installation cost can decrease and energy efficiency can increase. This research was supported by a grant(16CTAP-C116546-01) from Technology Advancement Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.