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2. Cottam power stations - Wikipedia

   en.wikipedia.org/wiki/Cottam_power_stations

   The main extraction pump discharged the condensate to No.1 D.C. heater from which it cascaded down to No.2 and then to No.3 D.C. heater by gravity. Two lift pumps delivered the condensate to No.4 D.C. heater, from which it cascaded through No.5 D.C. heater to two deaerator lift pumps.

3. Vapor-compression refrigeration - Wikipedia

   en.wikipedia.org/wiki/Vapor-compression...

   A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.

4. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   The fan coil unit will contain a purpose designed drip tray with drain connection for this purpose. The simplest means to drain the condensate from multiple fan coil units will be by a network of pipework laid to falls to a suitable point. Alternatively a condensate pump may be employed where space for such gravity pipework is limited.

5. Condenser (heat transfer) - Wikipedia

   en.wikipedia.org/wiki/Condenser_(heat_transfer)

   The condensate drips down and collects at the bottom, often in a built-in pan called a hotwell. The shell side often operates at a vacuum or partial vacuum, produced by the difference in specific volume between the steam and condensate. Conversely, the vapor can be fed through the tubes with the coolant water or air flowing around the outside.

6. Scroll compressor - Wikipedia

   en.wikipedia.org/wiki/Scroll_compressor

   A scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. [1] It is used in air conditioning equipment, as an automobile supercharger (where it is known as a scroll-type supercharger ) and as a vacuum pump .

7. Condensing boiler - Wikipedia

   en.wikipedia.org/wiki/Condensing_boiler

   Since the final exhaust from a condensing boiler has a lower temperature than the exhaust from an atmospheric boiler 38 °C (100 °F) vs. 204 °C (400 °F) a mechanical fan is always required to expel it, with the additional benefit of allowing the use of low-temperature exhaust piping (typically PVC in domestic applications) without insulation ...

8. Variable air volume - Wikipedia

   en.wikipedia.org/wiki/Variable_air_volume

   A VAV terminal unit, [9] often called a VAV box, is the zone-level flow control device. It is basically a calibrated air damper with an automatic actuator . The VAV terminal unit is connected to either a local or a central control system.

9. Rotary-screw compressor - Wikipedia

   en.wikipedia.org/wiki/Rotary-screw_compressor

   Principal view of the pumping action of a twin-screw pump with a six-lobe female screw and a five-lobe male screw. A compressor (as opposed to a pump) would be shaped the same way, except that the shape of the lobes would change along the length of the screw, so that the volume of the trapped pockets would get squeezed smaller as they get closer to the exhaust port.