回転貫入鋼管杭を用いた地中熱利用空調システムの検証

摘要

A series of the demonstration tests were conducted by synchronized operation between the ground source heat pump(GSHP) system and the air source heat pump(ASHP) system at the existing building to verify efficiency of the GSHP system using the steel pipe piles as the ground heat exchangers. The GSHP system achieved the energy conservation of 30-40% in the cooling period. However, it declined in the heating period because the temperature difference between the circulating water and the outer temperature was smaller than the cooling period. It was also confirmed that the ground temperature recovered in one year cycle.%川崎市南河原こども文化センターにおいて，鋼管杭を地中熱交換器に使用したGSHPとASHPの同期運転による性能比較，地中熱交換器の性能比較，地盤への影響を検証した.結果を以下にまとめる.(1)杭単位長さ当たり採放熱量を60W/mに設定したGSHPとASHPの同期運転試験では，GSHPの省エネルギー性能は，冷房40％,暖房8％だった.杭単位長さ当たり採放熱量を120W/mに設定したGSHPの省エネルギー性能は，冷房30％，暖房5％に低下したが，温暖地域の児童福祉施設での今回の空調スケジュールでは、特に冷房でメリットが大きい結果となった.