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10 Cards in this Set
- Front
- Back
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Careful balance of an air conditioning system is important because equipment ratings can be expected to be more or less accurate than they used to be, and usually there are larger or smaller amounts of excess capacity available |
More, smaller |
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Absolute zero temperature is equal to__________. |
-460 |
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A system, in which water circulates at a rate of 20 GPM, provides heat transfer equal to 200,000 BTU and being cold make 20 degree Fahrenheit if a fluid having a specific heat of 0.50 is substituted for the water and continues to flow at 20 GPM what is cooled 330 degrees Fahrenheit, the rate of heat transfer will be changed to__________ |
150,000 btuh |
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Glass window has an area of 20 square feet and an overall coefficient of heat transfer of 1.1. When outdoor air is 95° Fahrenheit and indoor temperature at 75° Fahrenheit the window glass transfers heat to the room at a rate of 440 mph. If the glasses change to a type of glass for which of you equals 2.88 in the area of the glass increase to 40 square feet, the heat flow through the new glass window will be _______ BTU H when outdoor and indoor temperature remain as before |
704 Btuh |
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Heat exchange equipment such as condensers and cooling towers often have two streams of media such as water and refrigerant, water and air, or refrigerant in air. Equipment Arrangement or methods of connection can produce several different floral arrangements at the direction of flow of one medium, as compared to the direction of flow of the other medium. 3 such flow arrangements are ________, __________, ________. |
Counter flow, parallel flow, cross flow |
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And given weight of gas occupies 20.7 cubic feet of space when subjected to a gauge pressure of 3 PSIG. What volume in cubic feet will be the same weight of gas occupy if the pressure is increased to 6 PSIG while temperature remains unchanged |
17.7 cu.ft. |
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And given weight of gas occupies 5 cubic feet of space when it's temperature is 4 degrees Fahrenheit in the volume in cubic feet will be the same weight of gas occupy the temperature increase is 140 degrees Fahrenheit, the pressure remaining unchanged? |
6 cu.ft. |
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Air flow through a cooling coil at a rate of 4000 CFM, entering a coil at 85 degrees Fahrenheit DB, 71 degrees Fahrenheit WB, 35 BTU per pound told him, and leaving the coil at 60 degrees Fahrenheit DB, 58 degrees Fahrenheit in WB, and 25 BTUs per pound total heat the coil, therefore removes total Heat at a rate of _______ Btuh |
180,000 btuh |
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Air flow through and cooling coil at a rate of 3000 CFM, entering a coil at 80° Fahrenheit dry bulb, sarrah degrees Fahrenheit what bowl, 34 BTU per pound total heating leaving The Klutz 56° Fahrenheit drywall and 54 degrees Fahrenheit wet-bulb, 22.7 BTUs per hour total heat a coiled therefore remove sensible heat at the rate of________ btuh |
77,760 |
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Andrew Machining by circulating a supply of warm air, they are being introduced into the room at a temperature of 95 degrees Fahrenheit. If the room temperature to be maintained at 75° Fahrenheit and dry bulb, 57° Fahrenheit, and under these conditions in room loses Heat at the rate of 2160 BTU H, how much Supply in CFM air is required |
100 cfm |
