An investigation is presented on the performance of a small-scale solar power and heating system with
short parabolic trough collectors (PTCs). The steady-state model of the short PTCs is evaluated with outside
experiments. The model mainly contains the heat loss of the receiver, the peak optical efficiency and the incident
angle factor consisting of incident angle modifier and end loss. It is found that the end loss effect is essential in
this model when the length of the PTCs is less than 48 m, especially in the winter. The standard deviation of the
steady-state model is 1.4%. Moreover, the potential energy efficiency ratio of the solar power and heating system
is considerably larger than the coefficient of performance (COP) of general air-source heat pumps, and increases
with the decrease of the condensation temperature. An overall system efficiency of 49% can be reached. Lastly,
the existence of a water storage tank improves the flexibility of heating the building, and the volume of the water
storage tank decreases with the increase of the heating water temperature.
ZHANG Guang (张光), LI Yong (李勇)
. Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(Sup. 1)
: 41
-49
.
DOI: 10.1007/s12204-018-2021-y
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