Decarbonizing Healthcare with Zero-carbon Reheat Systems
An innovative integrated AHU HEDS technology for dehumidification.
The existing HVAC system is being monitored following the pre-installation M&V plan. Engineering design for the replacement AHUs is underway, with the basis of design and 90% design development (DD) package completed.
Sustaining hygienic conditioned spaces is critical to the indoor air quality of healthcare facilities. This project will demonstrate a more energy-efficient and effective ventilation system called High Efficiency Dehumidification System (HEDS) Air Handling Unit (AHU) at a hospital. The dual goal is to reduce or eliminate natural gas use for the cooling/dehumidification/reheat process. Potential savings to California commercial buildings include: 1) cooling load reduction by at least 24% compared to traditional air handling systems which may result to annual savings of over 3,000 GWH and cost reductions of over $400M; and 2) eliminating the reheat and NG consumption from boiler use could result in annual savings of more than $600M, with emission reductions of greater than 4 million tons of CO2 and over 4,000 tons of NOx. This easily accessible high-stakes working demonstration could help HVAC design and procurement communities overcome the reluctance of adopting new innovative technologies.
The technology has the potential of reducing cooling load by over 24% and eliminate/reduce natural gas use for reheating. Implementation of the technology in CA commercial buildings could result in over $1 billion in savings.
The proposed system reduces greenhouse gas emission by over 4 million tons of CO2 and over 4,000 tons of NOx due to higher efficiency than traditional AHUs and the elimination of boiler use.