Testing Combination Systems CSA P.9 & ASHRAE 124 ACEEE Hot Water Forum 2013 Prepared By: Rosalyn Cochrane, Senior Standards Engineer, NRCan. Presented By: Martin Thomas, Project Engineer, NRCan. Natural Resources Canada, 2013
Background Combos filled a market gap for low cost, low heating output products This appears to be a Growing Market Currently combined performance is difficult to estimate.
ASHRAE 124 The Standard is Currently Under Review. It Will Have Two Parts: (1) Testing of Packaged Systems (Possibly as it is done for the CSA P.9 there is a Working Group looking at an appropriate Test Method) (2) Testing of Component Parts As per the current ASHRAE 124 Standard, i.e. Determining the Combined Annual Efficiency.
ASHRAE 124 The Standard Covers Oil Gas and Electricity as energy sources. The Standard Covers Both Forced air and Hydronic Systems. The New Edition will have both a Component Testing based CAE and a System Testing Based CAE. AHRI (Formerly GAMA) used to list the CAEs of Component Tested Combos.
Why do we need P.9 Need to test system at representative Heat Inputs Testing combos as an operating system, not individual components Need to evaluate the complete system and recognize performance interactions and synergies Smart integration Advanced controls
P.9 vs. other methods Water Heating Test intended to be as per Current DOE test (6 Draws, 64 US Gallons, 18 Hours on Standby) Doesn t force set points, which allows manufacturers to be creative with water temperature, Circ. fan speed, and other controls Weighted Efficiency ( Low Input, Medium & Maximum) in space heating mode
CSA P.9-11 Currently Only Applies to: Oil & Gas Fuelled Hot Water Systems that utilise a Fan Coil for heat Distribution (No Electric, Solar or Hydronic Systems), with integrated controls.
P.9 Performance Descriptors Thermal Performance Factor (TPF) Composite Space Heating Efficiency (CSHE) Water Heating Performance Factor (WHPF) 1 hr Water Delivery Rating (OHR)
Space Heating Input-Output air enthalpy approach Part load testing and rating based on load-weighted performance measurements Part load space heating cyclic tests 40% 15% Full load output (100%) CSHE = 0.1xEff(100%)+0.6xEff(40%)+0.3xEff(15%) Takes into account the energy input delivered to the airstream
Water Heating Water enthalpy method 24 hr simulated use test to determine recovery efficiency Combo capacity as a water heater determined and reported as a one hour rating Additional capacity testing done with and without concurrent calls for space heating
Technologies tested Combo 1: 40,000 Btu/h Power vented noncondensing storage tank (50 US Gal.) with Electronic Intermittent Ignition coupled with a 48,000 Btu/h air handler with ECM Motor. Rated at 24,000 Btu/h Output Heating Capacity. TPF = 0.57 [CSHPF = 58%, WHPF = 0.56]
Technologies tested Combo 2: 76,000 Btu/h Power vented condensing commercial storage tank (50 US Gal.) coupled with same air handler as in Combo 1. Rated at 24,000 Btu/h Output Heating Capacity. TPF = 0.68 [CSHPF = 67%, WHPF = 0.72]
Technologies tested Combo 3: Packaged System, 150,000 Btu/h condensing tankless water heater (Segregated). Rated at 46,000 Btu/h Output Heating Capacity. TPF = 0.83 [CSHPF = 83%, WHPF = 0.80]
Technologies tested Combo 4: Packaged System, 157,000 Btu/h condensing tankless water heater (Non- Segregated). Rated at 58,345 Btu/h Output Heating Capacity. TPF = 0.82 [CSHPF = 81%, WHPF = 0.91]
Technologies tested Combo 5: Packaged System, 116,000 Btu/h condensing tankless water heater (Segregated). Rated at 48,000 Btu/h Output Heating Capacity. TPF = 0.89 [CSHPF = 89.4%, WHPF = 0.83]
Technologies tested Combo 6: Packaged System, condensing tankless water heater. Rated at 65,000 Btu/h Output Heating Capacity. TPF = 0.95 [CSHPF = 95%, WHPF = 0.95]
Test Results
Next Steps Further testing of different heat generators: Oil & Gas Boilers Inclusion of testing for hydronic distribution systems Energy Star for New Housing (in Canada) - Combos must be P.9-11 Tested. - Performance Path / Prescriptive Path
QUESTIONS