Dawson Company

Who Should Attend?

Plumbing Engineers / Plumbing Engineers for Design Build Contractors

Topic: Centralized Heat Pump Water Heater (CHPWH) System Design Considerations and New Sizing Techniques

• Overview of heat pump refrigerantcycle

• Discuss Minimum Lift and Water SideDeltaT

• Current 3rd Party Testing Standards (Energy Star, DOE, AHRI Standard 1300)

• Typical refrigerants used for CHPWH

• General design considerations

• “Single-Pass” vs. “Multi-Pass” configurationvs. piping schematic
• Peak and off-peak scenario hydronic analysis
• General comments on “single-pass” vs.“multi-pass”, pro’s/cons
• Electric Swing Tank vs. Electric Backup –hydronic analysis
• General comments vs. gas-fired,ASPE Fixture Tables
• CHPWH Sizing Methods-Peak/Off -Peak Sizing Method -Ecotope Sizing Method -CBECC-Res 2019 Sizing Method
• Other Sizing Methods – ASHRAE LoadProfile
• Sizing example with CHPWH SizingMethods