COMPARISON OF IMPROVED FLAT PLATE COLLECTORS, CONCENTRATORS AND VACUUM COLLECTORS FOR MEDIUM TEMPERATURE APPLICATIONS
The greater part of the thermal energy is used at low temperature (<200**oC); two different temperature levels of applications can be distinguished: The first type of applications at 20-50 degrees C, the second type at <80**oC, there the simple technology of flat plate collectors fails. This has led to the development of improved collector types. The paper describes these improved collector types and gives some considerations about the possibilities of each type for a given application in a specified climate. The different factors influencing the collectors performance, factors related to the reduction of the heat losses or the increase of the optical performance, are discussed theoretically as well as from measurements carried out at the J.R.C. A comparison is made based on measurable and synthesizing data of a collector, such as the collector efficiency curve, the incident angle modifier, heat capacity. These results are confronted with the behaviour in a system and some economic considerations are taken into account.
Bibliographic Reference: ENERGY 1984, TEL AVIV (ISRAEL), MAY 14-17, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31485 ORA
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Record Number: 1989123079600 / Last updated on: 1987-01-01
Available languages: en