Important measures for saving energy in space conditioning systems are listed below:
(a) In order to minimise energy losses, adequate control of space conditioning and ventilation should be provided.
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(b) Door closers (or self-closing doors) should be fixed as far as possible.
(c) If uniform heating of an area is not essential, local heating, is used, will save energy.
(d) Roof cooling of building can reduce 15% to 20% of air conditioning load. This can be done by sprinkling water on the roof.
(e) Minimum windows with thick sheet glass should be provided in buildings where air conditioning is required.
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(f) Ceiling height of a building should not be more than 3 m, if a/c is to be installed. Otherwise false ceiling should be installed.
(g) Minimum outdoor air should be allowed to balance the exhaust requirements.
(h) Maintain a slight positive pressure to retard infiltration and heat gain.
(i) Exhaust air should be reused as fast as possible.
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(j) Ventilation and air-conditioning operation schedule is required to see that the exhaust system operates only when needed.
(k) There should be no air leakage in duct work. All leaks should be sealed by tapping or caulking.
(I) Ductwork insulation work should inspected, repaired and replaced, if necessary.
(m) Air filter should be cleaned or replaced on regular basis.
(n) Air outlets and inlets in the building should be kept clean and free of dust and obstructions.
(o) Fouled condenser increases and system pressure and defective or broken compressor rings cause high discharge temperatures. So check the operating pressures and temperatures to ensure fuel efficiency.
(p) You must ensure that oil pressure and temperature agree with the manufacturers recommendations. This can be done by inspecting instrumentation of the compressor.
(q) Ensure proper nozzle performance. Clean nozzles as and when required.