Date post: | 21-Jan-2018 |
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Education |
Upload: | university-of-minnesota |
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Mission: We connect individuals and their communities to the resources they need to identify and implement community-based clean energy projects
CERTs: Minnesotans Building a Clean Energy Future
Able to ramp the motor speed up and down to match the actual vacuum level needed
Usually replace a single-phase motor with a three-phase motor
You can de-rate a VFD for single-phase motor
Approx Cost: $7,000
Payback ranges: 6 to 26 yrs
VFD on Vacuum Pump
Able to ramp motor speed up and down to match vacuum level
Used in combination with a plate cooler for additional milk cooling
Approx Cost: $3,600
Payback: 3.6 to 11
VFD on Milk Pump
9 Uses cold well water to pre-cool the milk before entering refrigeration system
Reduces heat refrig system has to remove
Approx Cost: $3,600
Payback: 5-6 years
Plate Cooler (Pre-Cooler)
Newer type of compressor. 15-20% more efficient
Fewer moving parts
Digital or variable lobe reciprocating
Approx Cost: $3,200
Payback: 8-9 years
Scroll Compressors
Used to capture waste heat from refrigerant
Increases life of water heater
Increases compressor efficiency
Approx Cost: $3,100
Payback: 9.6 years
Refrigeration Heat Recovery for Water Heating
BIG fans with VFD and temp sensors
Down draft to keep cows cool
Approx Cost: $5,000 installed.
Payback: Varies
High Volume Low Speed Fans
Efficient fans with VFD and temp sensors
Maintenance
Approx Cost: $3,500
Payback: Depends!
Circulation Fans with VFDs
Better insulation prevents freezing and avoids heating
Must be properly installed – out of wind, 12” heat tube above frost line…
Approx Cost: $1,300
Payback: 2-5 yrs depending on condition of old waterers.
Low/No-Energy Waterers