Residential Solar Water Heating: California Adopters and their Experiences

Cover of Renewable Energy journal focusing on solar water heating and energy efficiency.

Solar water heating provides domestic hot water with lower greenhouse gas emissions compared to more typical natural-gas water heating. Solar water heating has a long history, particularly in places where the climate is favorable, such as California where state-backed incentive programs have been successful in creating small bursts of adoption.

Low-Cost, Large-Diameter Shallow Ground Loops for Ground-Coupled Heat Pumps

Cross-section of a ground-coupled heat pump with large-diameter shallow ground loops.

This project developed and validated modeling tools for simulating a ground heat exchanger technology that provides a less expensive method for implementing ground-source heat pumps and significantly reduces energy use in many California climate zones, furthering attainment of California’s energy goals.