Operation management of hybrid heat source heat pump systems by energy portfolio management

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02297
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 23020:Architectural environment and building equipment-related
• Research Institution: Hiroshima University
• Principal Investigator: Kindaichi Sayaka 広島大学, 先進理工系科学研究科(工), 准教授 (00396300)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: エナジーポートフォリオ管理 / ヒートポンプ / 未利用熱 / 地中熱 / 貯留水

Outline of Final Research Achievements

In this study, we proposed the Energy Portfolio Management method for hybrid heat source heat pump systems with ground sources (GSHP), reservoir water heat sources, and air sources (ASHP), which supported consistently from design to operation phases. We developed water flow control methods depending on heat loads based on experiment data to achieve high system performances including pumping power. A case study in Hiroshima University indicated that hybrid heat source heat pump system may continuously provide energy saving effects of 30-40% in the heating period and 25-30% in the cooling period compared to conventional air-cooled heat pump systems under adequate design and operation. The variable water flow control is effective to save energy especially in buildings which have relatively large pumps to deliver heat source water far from the buildings.

Free Research Field

建築設備

Academic Significance and Societal Importance of the Research Achievements

本研究では、冷房需要の多い温暖地の非住宅建築物における省エネ打開策として、未利用熱と空気熱を併用するヒートポンプシステムに注目し、搬送動力を含めたシステム全体のエネルギー効率の最大化を目的に、設計段階だけでなく運用段階においても持続的に運用改善を実践する手法として、エナジーポートフォリオ管理を提案した。将来的には、中央監視システムに適用することで、設計者・施工者または現場管理者による自発的なPDCAサイクルの循環を生み出すことを目指しており、後の再生可能エネルギー社会への転換に向けた一方策として、政策や実社会への波及効果が期待できる。