By Richard Nicholls
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Additional info for Heating,Ventilation and Air Conditioning
This process is fast enough to produce hot water instantaneously. Cold water from mains Return to boiler Heating circuit heat exchanger Flow from boiler Plate heat exchangers have a number of advantages over storage systems; · There are no standing heat losses since there is no stored volume of water to cool down overnight or at weekends. 22 Combination boiler One of the major benefits of this system is that it is simpler and less costly to install as the feed and expansion tank, indirect cylinder and cold water storage tank are not required.
As a consequence heat distribution systems which use air must be much larger than hydronic distribution systems to carry the greater volumes required. The relatively high thermal capacity of dense materials such as stone is used for thermal storage. 1). SENSIBLE AND LATENT HEAT Sensible heat and latent heat are both forms of thermal energy. The difference in name arises as a result of what happens to a material when the thermal energy is being absorbed. The absorption of Latent heat causes a change of state.
The relatively high thermal capacity of dense materials such as stone is used for thermal storage. 1). SENSIBLE AND LATENT HEAT Sensible heat and latent heat are both forms of thermal energy. The difference in name arises as a result of what happens to a material when the thermal energy is being absorbed. The absorption of Latent heat causes a change of state. One example is the absorption of the latent heat of vaporisation by water to change it from a liquid to a gas (water vapour). It should be noted that a substance gives out latent heat when the phase change is reversed.