ET24SWG0006 - Gas-Fired Heat Pump Water Heating - Phase 2F – Site #2

This project is a field study of a Gas Absorption Heat Pump (GAHP) water heater. The GAHP is a gas-fired technology and its technology readiness level (TRL) is 9. This project falls into phase 2F (field study phase) of a multi-phase field study pilot project for GAHP water heaters & combination systems. Phase 1 of this pilot was completed to address initial planning and data gathering necessary for phase 2F to launch. Phase 2F plans to have installations in five (5) sites total, but the other (4) sites are not part of this scope. For reference, Phase 2F Site #1 is currently underway.

This project is for Site #2 in phase 2F. Due to limited multifamily project availability, this Site #2 is a hotel that was selected due to the high hot watering heating energy usage and an existing system that provides ease of integration of the supplemental gas-fired heat pump water heater.

This study will determine the coefficient of performance (COP) of the baseline domestic hot water system (DHW) and the post-installation DHW system with the GAHP serving the base water heating load. This study will also determine the greenhouse gas (GHG) impacts of the GAHP water heater vs. an electric heat pump water heater. Lastly, this study will provide lessons learned for SoCalGas and for GAHP installation contractors in a DHW-only application.