testing combination systems csa p.9 & ashrae 124
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ACEEE Hot Water Forum 2013
Prepared By: Rosalyn Cochrane,
Senior Standards Engineer, NRCan.
Presented By: Martin Thomas,
Project Engineer, NRCan.
Testing Combination Systems CSA P.9 & ASHRAE 124
© 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 non-
condensing 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
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