Chapter 6 Basic Refrigeration Systems 99 Copyright Goodheart-Willcox Co., Inc. 2 Pro Tip Cooling Coill In various publications and in the field, the terms evaporator and cooling coil are often used interchange-- ably. However, this practice is not always accurate. Any tubing that provides cooling using a refrigerant that absorbs heat in order to evaporate is called an evapora--e tor. Any tubing that provides cooling using brine or any fluid that absorbs heat but does not evaporate is called a cooling coil. Often, cooling coils can be found on more complicated systems, such as ground-source heat pumps or complex commercial refrigeration systems that include a secondary loop refrigeration system. 6.6.2 Accumulator Refrigerant in a suction line is always supposed to be in vapor form. However, vapor refrigerant may condense before reaching the compressor. If this liquid refrigerant enters the compressor, it can cause considerable dam- age to the compressor. An accumulator is a tank in the suction line that prevents liquid refrigerant from flow- ing through the suction line and into the compressor. A typical accumulator has its inlet and outlet at the top. Any liquid refrigerant that flows into an accumulator falls to the bottom and must evaporate to enter the suction line, Figure 6-13. Accumulators are also referred to as suction accumulators because they are in the suction line. that include a secondary loop refrigeration system. Coolin g Coi In various p ublications and in the f ield, the terms evaporator and r coolin g coi l are often used interchange l ably. However, this practice is not always accurate. Any tubing that provides cooling using a refrigerant that absorbs heat in order to evaporate is called an vapora tor . Any tubing that provides cooling using brine or any r r fluid th at absorbs h ea t bu t does n ot evaporate is called t a cooling coil. Often, cooling coils can be found on more c omplicated systems, such as ground-source heat p umps or complex commercial refrigeration systems Lordan A.C.S. Ltd Figure 6-12. Two different size evaporators. A—A large rail evaporator with distributor shown on its side. B—A specially made miniature evaporator. A B Emerson Climate Technologies Figure 6-13. Note the inlet and outlet at the top of this accumulator. Inlet and outlet