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

By H.P. Garg

The aim of scripting this 3 quantity 'Advances in solar power expertise' is to supply all of the correct most up-to-date details to be had 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 themes extensive to help either the scholars (i.e. undergraduate, postgraduate, examine students etc.) and the pros (i.e. Consultancy, layout, and contracting firms). bankruptcy 1 begins with a quick heritage of sunlight homes (active heating), one of many oldest and nonetheless the generally used software of solar power. numerous tools of construct­ ing heating and different basic elements equivalent to development shape and capabilities also are defined. a number of elements of lively sun heating of creating like sun collector, garage method, regulate unit, auxiliary warmth resource, and so forth. are mentioned very in short. 3 different types of sun energetic heating of constructions like sun air platforms, sun liquid structures, and sun assisted warmth pump platforms are mentioned intimately during this bankruptcy. layout information and function of 9 commonplace sunlight homes that are in use in several weather conditions and utilizing a few more moderen strategies also are mentioned intensive during this bankruptcy.

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Additional resources for Advances in Solar Energy Technology: Volume 2: Industrial Applications of Solar Energy

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9 SCHEMATIC OF SERIES SOLAR HEAT PUMP SYSTEM. 10, the heat pump uses low evaporators one receiving heat from solar energy and another from ambient air. Here the heat pump CHAPTER 1 38 uses either the collected solar energy or ambient air energy depending which gives higher COP. When the solar storage tank temperature is quite high (higher than predetermined control value) the building load is directly supplied by this stored heat, when the storage temperature drops from this control value, it supplies heat to the evaporator of the heat pump as is done in a series system.

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.

The combined heat pump system will be more effective and economical at those places where either the electricity is very expensive, cooling is required or it can improve the collector efficiency. However, if cheap but efficient collectors are produced then the series heat pump design can be used economically. From the above, it appears that from economic considerations, there is hardly any justification in using a combined solar and heat pump system compared to pure solar and conventional heat pump systems separately.

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