| Autor: |
Meicun Li, Renyuan Zhang, Huanlian Zhu, Hanbing Wen |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Renewable Energy. 3:877-883 |
| ISSN: |
0960-1481 |
| Popis: |
The thermal performance and thermal processes of a glass tube collector have been analysed in this paper. Its thermal performance can be improved by changing the thermal processes to take advantage of the glass tube's ability to transmit sunlight; that makes it possible for the working fluid to directly absorb part of solar radiation. Its thermal performance is even better in most parts of the working region than that of a steel tube collector, even when the structure, meteorological conditions and thermodynamic properties of the working fluid are exactly the same. An equation of steady-state instantaneous efficiency of a glass tube collector has been derived in the paper. Calculations of various operating conditions have been made with a computer, and the calculated results are quite agreeable with the experimental results. Thus the equation and the calculation method can be used in the design of glass tube collectors and for comparison calculations. The calculations also show some other important features of a glass tube collector. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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