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Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [1]
The \(EER\) of an air conditioner or refrigerator can be expressed as \[EER = \dfrac{Q_c/t_1}{W/t_2},\] where \(Q_c\) is the amount of heat transfer from a cold environment in British thermal units, \(t_1\) is time in hours, \(W\) is the work input in joules, and \(t_2\) is time in seconds.
5.04 Air Change Rate Equations = CFM = AC/HR. = Air Change Rate per Hour CFM = Air Flow Rate (Cubic Feet per Minute) VOLUME = Space Volume (Cubic Feet) 5.05 Mixed Air Temperature T MA = T ROOM × + T OA × T MA = T RA × + T OA × CFMSA = Supply Air (CFM) CFMRA = Return Air (CFM) CFMOA = Outside Air (CFM) TMA = Mixed Air Temperature (°F) TROOM ...
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [1][2] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. The COP is used in thermodynamics.
10 wrz 2020 · For a Carnot cycle it can be calculated from T 2 /(T 2 − T 1). There is a third possibility, namely an air conditioner. This will incorporate a dehumidifier, but, in our present context we regard it as a device whose purpose is to pump heat from the room to the outside, rather than from outside to the room.
Air conditioners and refrigerators are designed to cool substances by transferring energy by heat Q c Q c out of a cool environment to a warmer one, where heat Q h Q h is given up. In the case of a refrigerator, heat is moved out of the inside of the fridge into the surrounding room.
An air conditioner is a refrigerator whose inside is the room to be cooled (T room = T low) and whose outside is the great outdoors (T outside = T high). An air conditioner uses a material called a "working fluid" to transfer heat from inside of a room to the great outdoors.
