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2. Heat pump and refrigeration cycle - Wikipedia

   en.wikipedia.org/wiki/Heat_pump_and...

   Vapor-compression refrigeration [6] For comparison, a simple stylized diagram of a heat pump's vapor-compression refrigeration cycle: 1) condenser, 2) expansion valve, 3) evaporator, 4) compressor (Note that this diagram is flipped vertically and horizontally compared to the previous one) [7] Temperature–entropy diagram of the vapor-compression cycle.

3. Cascade refrigeration - Wikipedia

   en.wikipedia.org/wiki/Cascade_refrigeration

   Alternatively, a liquid-to-liquid or similar heat exchanger may be used instead. The high-temperature system transfers heat to a conventional condenser that carries the entire heat output of the system and may be passive, fan, or water-cooled. This is an auto-cascade process with two different refrigerants.

4. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   The evaporator is where the circulating refrigerant absorbs and removes heat which is subsequently rejected in the condenser and transferred elsewhere by the water or air used in the condenser. To complete the refrigeration cycle, the refrigerant vapor from the evaporator is again a saturated vapor and is routed back into the compressor.

5. Absorption heat transformer - Wikipedia

   en.wikipedia.org/wiki/Absorption_heat_transformer

   The difference with absorption heat pump is that the absorber and evaporator now operate at high pressure and the condenser and generator at low pressure. The most common working pairs are water/lithium bromide (refrigerant = water, absorbent = LiBr) and ammonia/water (refrigerant = ammonia, absorbent = water).

6. Glycol chiller - Wikipedia

   en.wikipedia.org/wiki/Glycol_chiller

   A chiller is essentially a refrigerator that includes a compressor, evaporator, condenser and a metering device.An additional buffer tank is used with the chilling unit to provide additional system capacity to prevent excessive cycling, unexpected temperature fluctuations, and erratic system operation.

7. Chiller - Wikipedia

   en.wikipedia.org/wiki/Chiller

   Evaporator : The refrigerant liquid moves from the condenser in the upper shell down to the evaporator in the lower shell and is sprayed over the evaporator tube bundle. Due to the extreme vacuum of the lower shell [6 mm Hg (0.8 kPa) absolute pressure], the refrigerant liquid boils at approximately 39 °F (4 °C), creating the refrigerant effect.