A Study For Novel Concentrated Solar Power System

Concentrated Solar Power(CSP)technology offers the opportunity to meet the requirements of thermal energy and electrical energy.To achieve the required inlet temperature for ORC with good impact on environment is a big problem.The main objective of this study is to obtain the maximum thermal efficiency by using organic fluid and using different control strategies to control the system through simulation process.Thermal oils have been extensively utilized as the working fluids in solar thermal electric plants with PTCs.However,their operating temperature limitation and environmental pollution have caused employing alternative working fluids.In this study,following research work has been carried out;1)Concentrated solar power system for organic Rankine cycle is designed.This system is designed to control organic Rankine cycle in different conditions with novel design.In this system we can use heat transfer fluid in different situations like normal flow,bypass flow,and from auxiliary boiler in case of non-availability of Sun light.The system is a part of organic Rankine cycle system with 100 kWt and 10 kWe capacity.We studied only 8 parabolic collectors with 4 meters fluid tube.It has been assumed that therminol-66 HTF are applicable in the system.2)It is considered that effect of using organic fluid on absorbing heat collector from solar rays using parabolic collecting receivers.Autodesk Inventor software used to create 3D model for the chosen system and for thermal analysis used ANSYS software.ANSYS software also used to calculate the average solar irradiation in our proposed system and found to be 718 W/m~2.Therminol-66 provided at initial temperature of 80?.Kunming is the capital and largest city of Yunnan province in southwest China is chosen for this system at 18th of June at 12:18.By using these data as input in ANSYS software,simulation conducted for the heat transfer to the organic fluid after running for 1 hour and the results shows the following:Simulation results are as given;After the simulation results by ANSYS,we got the results for our system.1)Temperature of the organic fluid increased 115?in 1 h while running with 0.0694g/s of mass flow rate.2)Irradiation transferred to the fluid surface through the glass and vacuum layers and vacuum prevents loosing that power,thus value rises to 729 W/m~2 at the tube surface.3)Tube transfers the heat to the fluid using conduction with 115?rises in temperature in 1 h.Temperature values are in acceptable range considering that the system will consist of 3parabolic receivers with the same geometry in series.In the complete system,we can say that the exit temperature of the therminol-66 from the 3 series parabolic collectors system will be around 250?which is suitable temperature for organic Rankine cycle requirements and will provide high system efficiency.