Two-dimensional mathematical model of evacuated tube solar collector

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · J. Sol. Energy Eng.; (United States)

DOI:https://doi.org/10.1115/1.3267605· OSTI ID:6153497

Rahman, F; Al-Zakri, S; Rahman, M A.A.

Analysis of an evacuated tubular solar collector is presented by developing a two-dimensional performance model. The collector uses a thin flat plate spanning its diameter as its absorbing surface. Energy balances are made on collector plate and tube, each considered as a separate unit. It has been found that a zero capacitance model is quite adequate when hourly meteorological data are used, and hence in this study steady state analysis of the collector is made (1). The overall loss coefficient has been assumed to be constant for the whole plate. The model also includes optical effects. The emphasis of the investigation is to study the two-dimensional effects in the absorber plate housed in evacuated glass cylinders. Performance curves obtained from the two-dimensional model has been compared with that of HW model. It was found that the HW model overestimates the performance.

• Research Organization: Chemical Engineering Department, University of Petroleum and Minerals, Dhahran
• OSTI ID: 6153497
• Journal Information: J. Sol. Energy Eng.; (United States), Journal Name: J. Sol. Energy Eng.; (United States) Vol. 106:3; ISSN JSEED
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
ACCURACY
EQUIPMENT
EVACUATED COLLECTORS
EVACUATED TUBE COLLECTORS
FLAT PLATE COLLECTORS
HOURLY VARIATIONS
MATHEMATICAL MODELS
METEOROLOGY
OPTICS
PERFORMANCE
SOLAR ABSORBERS
SOLAR COLLECTORS
SOLAR EQUIPMENT
TWO-DIMENSIONAL CALCULATIONS
VARIATIONS