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28 Cards in this Set
- Front
- Back
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the porpose of the condenser is
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reject heat from the refrigerantion syatem
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the condensing mediums mest be
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lower then the refrigerant saturation temp
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the natural draft condenser design is most found in
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household refrigerators and frezzers
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the horizontalshell and tube water cooled condenser is very efficient in removing heat beacause?
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the water is designed to past through it more then once
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should there be any change in pressure throughout the condenser
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no
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what is the temp split for an air cooled condenser
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30 degrees
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the capacity or efficiency of an Evaporative condenser depends on
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Entering air wet bulb temp
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the cooling or water tower is
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an accessory to a water cooled condenser
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what is the designed temp split of a water cooled condenser?
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10 degrees
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What is the designed temp split of an evaporative cooled condenser?
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20 degrees
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what are the mediums used in condensing
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air, water
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The most heat removed from the refrigerant in the condenser is
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latent
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what are the three types of condencsers?
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air cooled, water cooled, evaperative cooled
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what is the minium amount of subcooling that must take place in the condensers
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5 degrees below the saturation temp.
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condenser theory of operation states
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the heat loss by the refrigeratant must be equal the heat gain by the condensing medium
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the purpose of the evaporator is
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absorb heat into the refrigeration system
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the temp of the medium being cooled must be
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above the evaporators saturation temp
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the two basic types of evaporators are
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direct expansion feed and flooded feed
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evaporator theory of operation
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the heat picked up by the refrigerant in the evaporator must equal th eheat given up by the medium being cooled
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the secondary refrigerant in a chiller system is usually
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water or brine
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prime surface evaporators operating below 32 degrees must frequently be
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defrosted
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should there be a pressure change anywhere throughout the evaporator?
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no
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flooded feed evaporaors are differant from DX feed evaporators in that they?
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allows for recirculation of liquid refrigerant
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what is the temp split for an air conditioning forced air cooled evaporator
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20 degrees
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what is the designed temp split between in the water in and water out on a chiller?
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5 degree
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what are the three basic construction styles of evaporator coils?
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finned tubes,plate, bare tube
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what is the designed superheat for a direct expansion evaporator?
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10 degrees
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the evaporator on a standard air conditiong system should operate at a saturation temp of
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40 degrees
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