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The temperature of the refrigerant inside the evaporator tubing. How do you calculate evaporator temperature from the suction pressure? How is evaporator TD calculated for a walk-in cooler? Subtract the saturated suction temperature SST from the box temperature. When the evaporator is subject to higher temperatures and loads than under normal operating conditions. During hot pull-down what is the evaporator experiencing? Starving because the refrigerant is boiling off quickly.
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You can also find solutions immediately by searching the millions of fully answered study questions in our archive. How do I view solution manuals on my smartphone? Evaporator temperature and suction pressure both decrease.
Why are multiple circuits used on larger evaporator coils? They provide less pressure drop than a long single circuit evaporator.
If the suction pressure of an R22 unit is 55 psig, what is the approximate evaporator temperature? If the suction pressure of an RA unit is 21 psig, what is the approximate evaporator temperature?
How do you determine the evaporator superheat of a refrigeration system? Subtract evaporator temperature from the temperature of the suction line at the expansion valve bulb.
What is the evaporator superheat? Based on the superheat in the previous question, is the evaporator normal, flooding, or starving?
Flooding Within how many degrees of the design box temperature can you check evaporator superheat? What are the two main categories of evaporator problems?
Air flow problems and refrigerant problems. Why is it necessary for the fin spacing in a freezer evaporator to be wide? Frost buildup will not occur as fast if the fin spacing is wide.
What is the basic sequence of operation at the beginning of a freezer defrost? Evaporator fans shut off, compressor shuts off, and heaters come on. Which freezer defrost system is more efficient: Hot gas is quicker because the heat goes through the evaporator tubing which was the coldest part of the coil during the freeze cycle.