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Download e-book for iPad: Solar Assisted Ground Source Heat Pump Solutions: Effective by Francesco Reda

By Francesco Reda

ISBN-10: 3319496964

ISBN-13: 9783319496962

ISBN-10: 3319496980

ISBN-13: 9783319496986

This publication analyses solar-assisted ground-source warmth pump structures, a expertise intended for generating heating and cooling power for constructions. It makes a speciality of floor resource warmth pump, reversible crucial heating and cooling procedure that move warmth from or to the floor, purposes which use sun thermal collectors.

Providing deep insights into energy-saving, sun thermal process working ideas, it illustrates examples of priceless configurations and controlling strategy for various climates for various vertical floor warmth exchanger depths.

Offering an summary of sun assisted floor resource warmth pump platforms, together with layout ideas and energy-performance information for various climates, it's a precious source for designers and scientists who concentrate on construction heating and cooling technologies.

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Extra info for Solar Assisted Ground Source Heat Pump Solutions: Effective Energy Flows Climate Management

Sample text

4 Solar thermal system configuration: direct or buffer (Glembin et al. 3 Performance The described solar collectors show different performances as a function of the external conditions. Generally solar collector efficiency can be calculated as the ratio between the useful thermal energy generated by the collector and the incident solar irradiance. Usually collector efficiency is expressed as a function of the inlet and ambient temperature and the total incident solar irradiance (Kalogirou 2014): gcoll   ðT i À T a Þ ¼ FR ðsaÞ À U L Gt ð2:1Þ where, τα is the transmittance absorptance product of the glass cover, Gt is the total solar irradiance incident on the solar collector surface, Ti and Ta are respectively solar collector inlet and ambient temperatures, UL is the solar collectors overall heat loss coefficient and FR is the heat removal factor of a specific typology of solar collectors.

2) by increasing T1 and, consequently, reducing the heat pump work. Another important operating mode is the ground regeneration. To avoid confusion, the regenerative process of the heat pump cold thermal source (ground) is intended when solar thermal energy is used to heat up the soil when the heat pump is off. As good practice suggests, storage tank is often used when solar collectors are adopted in order to collect solar heat surplus, as shown in Sect. 2. Therefore, solar heat can be used in a different time than when produced.

Thus, solar thermal collectors are arranged in series when the design system flow rate is low, while when the design flow rate is high collectors are arranged in parallel branches of series collectors. Solar thermal systems are often equipped with storage tank in order to store energy produced in a certain moment of the day and not utilised. Collectors can be connected only to the tank or to both tank and indoor heating distribution system as shown in Fig. 4. The last configuration, which is capable to increase the solar thermal energy yield compared to a solar thermal buffer system with small storage tank, is recommended only if the indoor distribution system requires low temperature such as radiant floor systems (Glembin et al.

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Solar Assisted Ground Source Heat Pump Solutions: Effective Energy Flows Climate Management by Francesco Reda


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