The approximate temperatures within a flat-plate solar collector under transient conditions

Tipo de material: Texto

TextoSeries ; Inl. J. Heat Mass Transfer, 28, p.433-440, 1985Trabajos contenidos:

Kamminga, W

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Resumen: Some of the heat resistances of a conventional flat-plate solar collector are smaller than others. Using this property, analytic approximations of the temperatures within the collector at a moment t = 0, are derived. They are expressed as functions of the time-varying behaviour of the insolation, the ambient temperature and the fluid outlet and inlet temperature. In particular, the fast-varying temperature of the fluid near the collector inlet has been shown. Some applications are mentioned, in which coarser approximations of the temperatures are possible. A simple, one-capacity differential equation describes the fluid temperature, in that case.

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Documentos solicitados	CICY Documento préstamo interbibliotecario	Ref1	B-14050 (Browse shelf(Opens below))	Available

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Previous	B-14048 The influence of climate and location on collector performance	B-14049 Dynamic method for solar collector array testing and evaluation with standard database and simulation programs	B-1405 The effect of weak Brownian rotations on particles in shear flow	B-14050 The approximate temperatures within a flat-plate solar collector under transient conditions	B-14051 Experimental and theoretical evaluation of dynamic test procedures for solar flat-plate collectors	B-14052 Evaluation of a transient test procedure for solar flat-plate collectors	B-14053 Transient test methods for flat-plate collectors: review and experimental evaluation	Next

Some of the heat resistances of a conventional flat-plate solar collector are smaller than others. Using this property, analytic approximations of the temperatures within the collector at a moment t = 0, are derived. They are expressed as functions of the time-varying behaviour of the insolation, the ambient temperature and the fluid outlet and inlet temperature. In particular, the fast-varying temperature of the fluid near the collector inlet has been shown. Some applications are mentioned, in which coarser approximations of the temperatures are possible. A simple, one-capacity differential equation describes the fluid temperature, in that case.

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