Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load...
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Transcript of Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load...
![Page 1: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/1.jpg)
Ron DomitrovicProgram Manager, Energy Efficiency
Variable Capacity HP Subcommittee8/28/2013
Load Based Testing for Unitary HVAC
![Page 2: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/2.jpg)
2© 2013 Electric Power Research Institute, Inc. All rights reserved.
Load Based Testing of Variable Systems
• Psychrometric rating testing is standard for unitary HVAC equipment
– 80°/67° is accepted as THE standard
– Controlled return air conditions
– Measured capacity/power/efficiency with system on.
• Works well for single-speed HVAC systems
![Page 3: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/3.jpg)
3© 2013 Electric Power Research Institute, Inc. All rights reserved.
Load Based Testing of Variable Systems
• Common standards:
– AHRI 210/240: Systems < 65,000Btu/hr
– AHRI 340/360: Systems > 65,000 Btu/hr
– ANSI/AHRI 1230: VRF systems <300,000 Btu/hr
![Page 4: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/4.jpg)
4© 2013 Electric Power Research Institute, Inc. All rights reserved.
Load Based Testing of Variable Systems
– Designed for fair comparison among similar systems
– NOT primarily designed for energy calculation
• However; generally OK with single speed systems
• Difficulties with variable capacity systems
THESE ARE RATING STANDARDS
![Page 5: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/5.jpg)
5© 2013 Electric Power Research Institute, Inc. All rights reserved.
Load Based Testing of Variable Systems
– Why?
• Current standards require fixed operation
• Fixed operation may not capture actual (field) behavior
• Systems can be configured for optimal operation (for rating)
– May or may not match field operation
• Energy use is dependant on actual operation
![Page 6: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/6.jpg)
6© 2013 Electric Power Research Institute, Inc. All rights reserved.
Load Based Testing of Variable Systems
• Load Based Testing
– Also called “calorimetric testing”
– Load on system is held constant
– No fixed control of system under test
– ASHRAE TC 8.11 is exploring possibilities
– Potentially more appropriate for energy calculation
– More difficult—labs are not currently set up for it
![Page 7: Ron Domitrovic Program Manager, Energy Efficiency Variable Capacity HP Subcommittee 8/28/2013 Load Based Testing for Unitary HVAC.](https://reader030.fdocuments.us/reader030/viewer/2022020219/56649f385503460f94c54faa/html5/thumbnails/7.jpg)
7© 2013 Electric Power Research Institute, Inc. All rights reserved.
Together…Shaping the Future of Electricity