Figure 17-1 Residential air conditioner (Image courtesy of Bryant Heating & Cooling Systems)
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1 Figure 17-1 Residential air conditioner (Image courtesy of Bryant Heating & Cooling Systems)
2 Figure 17-2 Commercial refrigeration Unit
3 Figure 17-3 Industrial process chiller
4 Figure 17-4 Basic refrigeration cycle of an R-410A air conditioning system
5 Figure 17-5 Water boils at 50 F under a vacuum
6 Figure 17-6 Cutaway of a piston (reciprocating) compressor (Courtesy Danfoss Inc.)
7 Figure 17-7 Cutaway of a rotary compressor
8 Figure 17-8 Cutaway of a centrifugal compressor (Photo courtesy of McQuay International)
9 Figure 17-9 Cutaway of a screw compressor (Courtesy of Carrier 2008 Carrier Corporation)
10 Figure Cutaway of a scroll compressor (Courtesy Danfoss Inc.)
11 Figure These two condensing units have the same cooling capacity; the larger unit is a higher efficiency unit
12 Figure These two evaporators have the same cooling capacity; the larger coil is a new higher efficiency evaporator coil
13 Figure Condensers: (a) Air cooled; (b) Water cooled; (c) Evaporative condenser, also called a sump
14 Figure Natural draft condenser
15 Figure The cups of the fan blades face the coil on a forced draft condenser
16 Figure The cups of the fan blades face away from the coil on an induced draft condenser
17 Figure The tube-in-tube single circuit condenser
18 Figure Tube-in-tube multiple circuit condenser (Courtesy of Doucette Industries, Inc.)
19 Figure The water and refrigerant travel in opposite direction in a counterflow heat exchange
20 Figure Cross section of tube-in-tube coil
21 Figure Schematic cross section of tube-by-tube coil
22 Figure Operating evaporative condenser (Courtesy of Evapco, Inc.)
23 Figure Capillary tube metering device
24 Figure Orifice type metering device
25 Figure The TEV bulb pressure is balanced by the evaporator pressure and spring pressure
26 Figure Thermostatic expansion valve on high efficiency coil
27 Figure Different types of evaporators; (a) Bare pipe; (b) Finned tube; (c) Plate
28 Figure Cross section of typical finned tube coil construction
29 Figure Evaporator coil drain pan
30 Figure The fins are spaced wider apart on coils that operate below freezing
31 Figure The suction line entering the compressor is the large line, the discharge line leaving the compressor is the small line
32 Figure Suction and liquid lines on a residential split system air conditioner
33 Figure Liquid refrigerant drains into the receiver, and vapor flows back to the condenser through the condensate line
34 Figure Receiver tank as part of a refrigeration condensing unit (Courtesy Danfoss, Inc.)
35 Figure Unevaporated liquid refrigerant flows into the accumulator; vapor refrigerant is drawn off the top of the accumulator. A screen covers the oil return port to prevent debris in the system from plugging the port; (a) Diagram
36 Figure Unevaporated liquid refrigerant flows into the accumulator; vapor refrigerant is drawn off the top of the accumulator. A screen covers the oil return port to prevent debris in the system from plugging the port; (b) Accumulator
37 Figure Simplified ammonia-water absorbtion cycle. The solution cycle is on the left; the refrigeration cycle is on the right (From Advanced Course in Gas Air Conditioning, 1965, courtesy of the Southern Gas Association in cooperation with the Texas College of Arts and Industries, Kingsville, Texas)
38 Figure Evaporative cooler (Image property and courtesy of AdobeAir, Inc.)
39 Figure Temperature difference between the two junctions creates a DC current flow
40 Figure A DC current imposed across the two junctions creates a temperature difference
41 Figure Modern thermoelectric modules use semiconductors to create the Peletier effect
42 Figure Complete thermoelectric cooling module including heat sinks (Courtesy of Thermoelectric Cooling America (TECA) Corp.)
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