Last edited 23 Sep 2016

Cooling systems for buildings

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[edit] Introduction

It can be necessary to provide cooling to buildings during warm weather, or where there are significant thermal gains (such as solar gain, people and equipment). This cooling is sometimes referred to as comfort cooling. Cooling may also be necessary for refrigeration or for some industrial processes.

[edit] Passive cooling

Passive or 'natural' cooling can be provided by:

[edit] Active cooling

Active cooling can be provided by:

Active cooling might be provided as part of a heating, ventilation and air conditioning system (HVAC) which may also include air filtration and humidity control. The cooling process itself can result in dehumidification, as cool air is less able to ‘hold’ moisture than warm air. The term air conditioning is sometimes take to mean control over air temperature and humidity, rather than just temperature control in the case of comfort cooling.

NB Direct evaporative cooling results in humidification of air.

NB Night time purging, and ground coupling are sometimes considered to be passive, rather than active systems.

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