Part | Title |
---|---|
7685.0100 | AUTHORITY, APPLICABILITY, AND PURPOSE. |
7685.0120 | DEFINITIONS. |
7685.0130 | ENERGY EFFICIENCY CRITERIA. |
7685.0140 | INCORPORATIONS BY REFERENCE. |
The commissioner is authorized by Minnesota Statutes, section 446A.21, subdivision 2, to establish energy efficiency criteria for replacement cooling systems.
MS s 446A.21
18 SR 1443
January 19, 2005
"Cooling efficiency" means an expression of energy or energy performance in items A to C.
Kilowatts per ton (kW/ton) is the total electrical input (kW) divided by the net cooling capacity (in tons).
Coefficient of performance is the net cooling capacity divided by the energy input rate, when both are expressed in the same unit of measure.
"Once-through cooling system" means a once-through system that has been issued a permit by the Department of Natural Resources to use in excess of 5,000,000 gallons of water annually from a groundwater source.
"Once-through system" means a space heating, ventilation, air conditioning (HVAC), or refrigeration system used for any type of temperature or humidity control application, using groundwater that circulates through the system and is then discharged without reusing it for a higher priority purpose.
MS s 446A.21
18 SR 1443; L 2001 1Sp4 art 6 s 1
January 19, 2005
All systems must meet the cooling efficiency criteria established in this subpart.
The cooling efficiency of a new centrifugal or rotary screw chiller must be 0.61 kW/ton or less (or equivalent if other energy sources are used) at standard rating conditions specified in ARI Standard 550-1992.
The cooling efficiency of a previously used (existing) centrifugal or rotary screw chiller that has been rebuilt or modified must be 0.70 kW/ton or less (or equivalent if other energy sources are used) at standard rating conditions specified in ARI Standard 550-1992.
The coefficient of performance of a new absorption chiller must be at least 0.90 at standard rating conditions specified in ARI Standard 560-1992.
The cooling efficiency of district cooling systems must be at least one kW/ton based on seasonal performance of the district cooling system.
A system using CFC refrigerants does not comply with the energy efficiency criteria of this part.
The cooling efficiency of a system must be certified by a mechanical engineer registered in Minnesota using data provided by the equipment manufacturer.
MS s 446A.21
18 SR 1443
January 19, 2005
The standards incorporated by reference are available for public inspection at the Minnesota State Law Library and through the Minitex interlibrary loan system. In addition, ARI standards are available through the Air-Conditioning & Refrigeration Institute, 4301 North Fairfax Drive, Suite 425, Arlington, VA 22203.
MS s 446A.21
18 SR 1443
January 19, 2005
Official Publication of the State of Minnesota
Revisor of Statutes