By H.P. Garg

The goal of penning this 3 quantity 'Advances in solar power expertise' is to supply all of the suitable most recent details on hand within the box of solar power (Applied in addition to Theoretical) to function the simplest resource fabric at one position. makes an attempt are made to debate issues extensive to aid either the scholars (i.e. undergraduate, postgraduate, examine students etc.) and the pros (i.e. Consultancy, layout, and contracting firms). bankruptcy 1 starts off with a short historical past of sun homes (active heating), one of many oldest and nonetheless the commonly used program of solar power. a number of equipment of construct­ ing heating and different common elements corresponding to construction shape and features also are defined. a number of parts of energetic sun heating of establishing like sunlight collector, garage method, keep an eye on unit, auxiliary warmth resource, and so on. are mentioned very in short. 3 sorts of sun energetic heating of constructions like sun air structures, sun liquid platforms, and sunlight assisted warmth pump platforms are mentioned intimately during this bankruptcy. layout info and function of 9 common sun homes that are in use in several weather conditions and utilizing a few more recent innovations also are mentioned extensive during this chapter.

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Storage capacity 200 to 250 Kg rocks/m 2 2. 180 to 250 KJ/m 2 Storage thermal capacity 3. Rock size 4. 5 m 5. Pressure drop in rock bed 60 Pa minimum 6. 4 m/s Maximum entry air velocity in rock bed t Air flow rate in heat distribution system 1 0 1 i t e r s / m2 s Pressure drop in duct work 10 Pa heating. Thus tbere is no need of a heat exchanger. The heat storage system consisting of small sized rocks acting as heat storage and heat exchanger and the high degree of stratification in the storage leads to lower inlet collector CHAPTER 1 32 temperature resulting in higher collector efficiency.

Collectors pressure drop 50 to 200 Pa Thermal Storage 1. Storage capacity 200 to 250 Kg rocks/m 2 2. 180 to 250 KJ/m 2 Storage thermal capacity 3. Rock size 4. 5 m 5. Pressure drop in rock bed 60 Pa minimum 6. 4 m/s Maximum entry air velocity in rock bed t Air flow rate in heat distribution system 1 0 1 i t e r s / m2 s Pressure drop in duct work 10 Pa heating. Thus tbere is no need of a heat exchanger. The heat storage system consisting of small sized rocks acting as heat storage and heat exchanger and the high degree of stratification in the storage leads to lower inlet collector CHAPTER 1 32 temperature resulting in higher collector efficiency.

3(c). P ~ " 0" (j ...... x >- IX LOAD « ~ ~ 0" '? 3 SEPARATE AUXILIARY HEAT SUPPLY SYSTEM POSSIBLE MODES OF AUXILIARY HEAT ARRANGEMENTS IN SOLAR ACTIVE SPACE HEATING SYSTEMS. 3(d). Here during off-peak periods, the electric energy is used to charge the storage sytstem and is used for room heating. Whenever, solar energy is available it is used to charge the storage system. This SOLAR HEATING OF BUILDINGS: ACTIVE SYSTEMS 25 combined storage system results in lowering the collector performance due to increase in inlet temperature.

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