A methodology to assess suitability of a site for small scale wet and dry CSP systems

作者：Uzgoren Eray^*; Timur Eray

来源：International Journal of Energy Research, 2015, 39(8): 1094-1108.

DOI：10.1002/er.3314

• solar resource assessment
• system level simulations
• concentrated solar power systems
• organic Rankine cycle
• make-up water
• wet tower
• dry cooling
• parabolic trough collectors

This study presents a methodology to assess suitability of a site for small scale concentrated solar power (CSP) systems for its energy conversion efficiency and make-up water requirement. Energy conversion efficiency of CSPs relies not only on the level of direct solar radiation but also on the performance of the cooling system. Regions with high solar potential have to deal with heat rejection at elevated temperatures which causes reduced energy conversion efficiencies due to high condenser temperatures. It is desirable to utilize wet cooling systems as they can achieve temperatures lower than the dry bulb temperature by evaporative cooling. On the other hand, such regions usually lack water resources which deteriorate the sustainable nature of CSP applications. This study combines various available models for both solar resource estimation and cooling systems' performance considering (i) the influence of ambient temperatures, and (ii) the influence of humidity levels. These models are integrated together to analyze the use of dry or wet cooling systems in terms of overall energy output and water consumption at a selected site in northern Cyprus. The model inputs consist of only annual hourly surface weather data and the location of the site of interest. The results show that dry cooling unit at northern Cyprus is capable of saving water about 18.7ton/MWh while it produces 27% less energy compared to the wet cooling alternative for the representative annual weather data.

• 出版日期2015-6-25