TOKYO, July 1, 2025 - (JCN Newswire) - Mitsubishi Heavy Industries Thermal Systems, Ltd. (MHI Thermal Systems), a part of Mitsubishi Heavy Industries (MHI) Group, has begun field test of a jointly developed "Surplus Renewable Energy Absorption and Release System" utilizing the Aquifer Thermal Energy Storage (ATES) system. The test is being carried out jointly with partners including Osaka Metropolitan University, which serves as project representative(1). The project, titled "Development of Technology for Absorbing Surplus Renewable Energy in ATES systems," was selected by the Japan's Ministry of the Environment in 2023 as a "Regional Co-creation and Cross-sectoral Carbon Neutral Technology Research Development Program(2). In April 2025, cold-storage operation utilizing surplus energy began at the Osaka City Maishima Sports Center for Persons with Disabilities (AMITY MAISHIMA).