Hello, please I want to know how to calculate the overall efficiency of a concentrated solar power plant (CSP) which uses parabolic trough concentrator,so please if you can provide me with detailed information and calculation method. My CSP power plant is running under basic rankine cycle,with a pump,parabolic trough concentrator, a turbine and a condenser. The boiler,in this power plant is replaced by the parabolic trough concentrator to generate steam before entering the turbine. The idea is to find how the integration of parabolic trough concentrator,will affect the efficiency formula of the basic rankine cycle,maybe it will multiplied by the collector efficiency,so how to calculate it?