Download Advances in Solar Energy Technology: Volume 2: Industrial by H.P. Garg PDF

By H.P. Garg

The function of penning this 3 quantity 'Advances in solar power expertise' is to supply all of the proper most modern info on hand within the box of solar power (Applied in addition to Theoretical) to function the easiest resource fabric at one position. makes an attempt are made to debate issues extensive to help either the scholars (i.e. undergraduate, postgraduate, learn students etc.) and the pros (i.e. Consultancy, layout, and contracting firms). bankruptcy 1 begins with a short heritage of sun homes (active heating), one of many oldest and nonetheless the commonly used software of solar power. a variety of equipment of construct­ ing heating and different normal features reminiscent of development shape and features also are defined. numerous parts of lively sun heating of establishing like sunlight collector, garage approach, keep an eye on unit, auxiliary warmth resource, and so on. are mentioned very in brief. 3 kinds of sunlight lively heating of structures like sun air platforms, sunlight liquid structures, and sunlight assisted warmth pump platforms are mentioned intimately during this bankruptcy. layout info and function of 9 usual sunlight homes that are in use in several weather conditions and utilizing a few more recent ideas also are mentioned extensive during this chapter.

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Extra info for Advances in Solar Energy Technology: Volume 2: Industrial Applications of Solar Energy

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In this case when the building heating is required, the upper set point in the room thermostat gives a signal to the control unit which in turn operate the blower, the dampers, auxiliary heater (Off), etc. and the cold building air is sucked through the bottom of the rock bed storage systems, get heated and transferred from the top of storage unit to the building. If the required building temperature is met then the room thermostat through control unit will turn off the blower. However, if the hot air from the storage unit is not able to maintain the desired temperature in the building, then the building temperature will continue to fall, until the second lower set temperature of the room thermostat reached, whiyh then 29 SOLAR HEATING OF BUILDINGS: ACTIVE SYSTEMS turn on the auxiliary heater and maintain the building temperature.

Extensive research and development work for a suitable phase change storage material for building heating is carried out but no practical solution appears to be found out. Several problems and possible solutions with phase change materials are discussed by Garg[85]. 4. Although several materials have been tried, but the only phase change storage device which is commercially sold in a few countries for solar house heating is the eutectic salts commonly known as 'Glauber's Salt' and is sodium sulphate decahydiate.

The most obvious choice with liquid colle- SOLAR HEATING OF BUILDINGS: ACTIVE SYSTEMS 19 ctors is water in tank and sometimes with some antifreeze liquid additive is used. 2 KJ/Kg K but a heat exchanger is required to transfer energy from stored water to the point of use[76,77]. 8 KJ/K. The rock bed system is used alongwith air collectors. Air can be used as a heat transfer media in rock bed system without heat exchanger. This combination has an additional advantage that it cannot freeze and a little leakage will not be a problem.

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