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15 Cards in this Set
- Front
- Back
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What are the 3 basic recovery methods?
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-passive...makes use of compressor to pump refrigerant into cylinder
-absorption...uses material that acts as a desiccant for absorption -active recovery...most common, use external pump to remove refrigerant as liquid or vapour |
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ozone layer is located where?
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10 to 40 km above the earths surface
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ozone concentration is less than?
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1ppm
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the thickness of ozone found in a column of the earths atmosphere is approximately?
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1/8 in (0.3) cm thick
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What ultraviolet rays does the sun produce?
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UVA, UVB, and UVC
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1 % depletion in the ozone increases exposure to UVA and UVB by?
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1.5% to 2%
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Where can ozone be found in which it assist in the formation of smog?
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tropospheric zone
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1 chlorine atom has been found to destroy how many ozone molecules?
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100,000
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what are ODP values based on?
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based on a comparison to the ozone depletion potential of r 11 and r 12
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What are GWP values based on?
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based on a comparison to the effects of one kilogram co2 over 100 year time span
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TEWI values
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are mathematically calculated using refrigerant efficiencies, leakage rates, operating charge, equipment life span, energy consumption, energy generation type
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The 4 r's
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Recovery - remove from system (mandatory)
Reuse - put back into system Recycle - on site processing Reclaim - off site - recognized facility |
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Deep vacuum levels
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-minimum vacuum of 500 microns
-minimum hold time 15 mins |
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CSA B52 is?
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mechanical refrigeration code
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CSA B51 is ?
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Boilers, pressure vessel and pressure piping code
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