Comparing the efficiency of evacuated tube and flat-plate
solar collectors in real installation conditions
More details
Hide details
1 |
University of Warmia and Mazury in Olsztyn |
Publication date: 2021-02-12
BoZPE 2020;(2):31–38
KEYWORDS
TOPICS
ABSTRACT
The subject of the work is an analysis of two types of solar collectors: flat-plate and evacuated
tube collectors in the same, natural working conditions during the period from 1st
May 2017 to 30th September 2017. The scope of work includes a descriptive presentation
of a measuring setup, located on the roof of the building of the Construction University of
Warmia and Mazury in Olsztyn, and also the research methodology, as well as an analysis
of the results and conclusions obtained. The measurements allow a comparison of the efficiency
of the flat-plate and evacuated tube collectors by calculating heat yields, based on
the following variants: average hourly irradiation, outdoor air temperature, temperature of
the medium supplying the collectors and temperature of the returning medium. An analysis
of the heat yield was made in relations to the individual absorber surface, to determine
which of the tested collectors showed higher efficiency under real operating conditions
during the spring-summer period.