Advanced Modeling of CSP Plants with Sensible Heat Storage: Instantaneous Effects of Solar Irradiance

Behnam Mostajeran Goortani, Hossein Heidari


A flexible model for concentrated solar thermal power plants with two tank active direct storage system is developed on gPROMS platform. Eutectic mixture of potassium and sodium nitrates salt melt is used as heat transfer fluid and storage medium. The solar radiation data obtained from a weather station, during 10 years in the city of Isfahan are used. It is showed that the Bird’s clear sky model well represents the normalized weather data. The storage system is designed to feed the boiler for 15 hours in the absence of sun. The model predicts the instantaneous effects of solar irradiance change and calculates variable with time parameters of the CSP plant; namely, the salt melt flow rates through receiver and boiler, and tank levels during 24 hr. The results indicate that a collector surface area of 35 m2 and 250Kg mixture of nitrate salts, per 1 KW electricity generation, is necessary. With respect to the “variable with time” nature of solar irradiance, the role of storage tanks to damp fluctuations in process parameters of a CSP plant is further quantified. A 2500 Kg of heat storage material eliminates variable collector surface area need of 100 m2 to 1500 m2 or equivalently, eliminated increasing boiler temperature greater than 1000 oC.

Total Views: 74

Full Text:



S.F. Hosseini, B.M. Goortani, M. Niroomand, Instantaneous Responses of on-grid PV Plants to Changes in Environmental and Weather Conditions, International Journal of Renewable Energy Research (2016), 6(4) ( in press).

J.D.Osorio, R. Hovsapian, J.C.Ordonez, Dynamic analysis of concentrated solar supercritical CO2-based power generation closed-loop cycle Applied Thermal Engineering (2016), 93(25), 920–934.

B.M. Goortani, A. Gaurav, A. Deshpande, F.T.T. Ng, and G. L. Rempel, Production of Isooctane from Isobutene: Energy Integration and Carbon Dioxide Abatement via Catalytic Distillation, Industrial Engineering and Applid Chemical Reearch (2015), 54 (14), 3570–3581.

A.Gil, M.Medrano, I.Martorell, A.Lázaro, P.Dolado, B.Zalba, L.F.Cabeza, State of the art on high-temperature thermal energy storage for power generation: Part 2—Case studies, Renewable and Sustainable Energy Reviews (2010), (14) 56-72

R.E.Bird, R.L.Hustrom, A simplified clear sky model for direct and diffuse insolation on horizontal surface, Solar Energy Research Institude, SERI/TR-642-761 (1981).

Duffie, J.A., Beckman, W.A., Solar engineering of thermal processes, 2ND ed., John Wiley & Sons Inc. (1980).

A. R. M.Collares-Pereria, The average Distribution of Solar Radiation- Correlations between Diffuse and Hemispherical and between Daily and Hourly Insolation Values, Solar Energy (1979) (22).

R.E.Sonntag, C.Borgnakke, G.J. Van Wylen, Fundamentals of Thermodynamics, Mc GraHill Publications, 6th ed. (2003).

L.Y. Bronicki, History of Organic Rankine Cycle systems, Organic Rankine Cycle (ORC) Power Systems (2017) 25-66.

B. M. Goortani, E. Mateos Espejel, J. Paris, Integration of a cogeneration unit into a Kraft pulping process, Applied Thermal Engineering (2010), (30) 2724-2729.


  • There are currently no refbacks.

Online ISSN: 1309-0127;;

IJRER is cited in SCOPUS, EBSCO, WEB of SCIENCE (Thomson Reuters)