High-Performance Air-Source Cold Climate Heat Pump (CCHP)
Abstract
Through this project United Technologies Research Center (UTRC) demonstrated a nominal 10TR high-efficiency cost-competitive Cold Climate air-source Heat Pump (CCHP) system at a Department of Defense installation in a relevant climate zone. The CCHP achieved greater than 40 percent annual combined space heating and cooling energy savings, in ASHRAE climate zone 6A, while meeting the current pricing of state-of-the-art (SOA) mid-tier heat pumps. Demonstrations were conducted at the Maine Army National Guard headquarters at Camp Keyes in Augusta, ME and at UTRCs psychrometric chamber in E. Hartford, CT. SOA industry standard heat pumps can degrade by up to 60 percent in capacity and 50 percent in system efficiency at extreme heating conditions. Two key enabling technologies, high-efficiency high-lift compression and system-level design optimization for cold climates enabled this performance. During Phase I of this project a SOA Carrier heat pump unit was installed at the Maine field trial site, and a full year of data was obtained. During Phase II this unit was replaced by the new UTRC CCHP and another year of data was obtained. This project bought the prototype CCHP components and system to TRL8, demonstrated a greater than 30 percent decrease in annual energy consumption over state-of-the-art systems in all cold climates (Zones 4A through 7), and demonstrated site autonomous operation of the prototype CCHP.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2020
- Accession Number
- AD1154584
Entities
People
- Ahmad Mahmoud
- Frederick Cogswell
Organizations
- United Technologies Corporation