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ASHRAE Refrigeration Standards |
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| › ASHRAE Refrigeration Standards |
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| Standard 15-2007 - Safety Standard for Refrigeration Systems
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In June 2007, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) published Standard 15-2007 to establish procedures for operating equipment and systems assuring the safety of building occupants and system technicians.
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| Scope |
ASHRAE standard 15-2007 applies to:- the design, construction, test, installation, operation, and inspection of mechanical and absorption refrigeration systems, including heat pump systems used in stationary applications
- to modifications including replacement of parts or components if they are not identical in function and capacity, and
- to substitutions of refrigerant having a different designation.
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| Safety issues |
The new standard provides an update to the 2004 version to enhance the safety of refrigeration systems by setting new requirements for internal relief devices (i.e. valves) discharging overpressure refrigerants to a lower pressure portion of the system. The change is intended to keep refrigerants safely contained within a refrigeration system. In addition, the standard outlines the principles of relief device selection for positive displacement compressors.
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| Standard 117-1992 / 117-2002 - Method of Testing Closed Refrigerators |
This standard was established under the Energy Star programme as the first test methodology for determining the daily energy consumption of solid-door and glass-door reach-in commercial refrigerators and freezers. It allows for comparative evaluations of product temperature performance, refrigeration load, suction pressures required etc.
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| Scope |
ASHRAE Standard 117-1992 applies to:- closed refrigerators for holding or displaying food for which refrigeration is either required or desired,
- both low-temperature and medium-temperature closed refrigerators, and
- both remote and self-contained refrigerators.
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| Testing method |
In this test the unit is loaded with a simulated product, and the control is adjusted to maintain a typical set point (-18°C±17°C for freezers, 3°C±17°C for refrigerators). The ambient around the unit is maintained at 24°C. After the unit achieves a steady-state condition, each door is opened for six seconds every 10 minutes for eight hours, thereby simulating the activity of a refrigerator during its peak use hours. After eight hours, the doors remain closed for the next 16 hours. Both periods are combined to calculate the total daily energy consumption.
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| More information: |
› ASHRAE website
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