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CONCENTRATED SOLAR RECEIVER FOR ORGANIC RANKINE CYCLE (ORC)

IP.com Disclosure Number: IPCOM000206288D
Publication Date: 2011-Apr-18
Document File: 5 page(s) / 46K

Publishing Venue

The IP.com Prior Art Database

Abstract

A direct concentrated solar receiver is disclosed. The solar receiver described herein is a boiler having an array of parallel tubes with a surface coating to absorb the concentrated solar radiation. The parallel tubes contain organic working fluid. Further, the solar radiation is focused upon the surface coating by a heliostat mirror field with increased efficiency. Further, the boiler comprises preheating, evaporation and superheating of the fluid in a once-through design.

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Page 01 of 5

RP13583

CONCENTRATED SOLAR RECEIVER FOR ORGANIC RANKINE CYCLE (ORC)

BRIEF ABSTRACT

     A direct concentrated solar receiver is disclosed. The solar receiver described herein is a boiler having an array of parallel tubes with a surface coating to absorb the concentrated solar radiation. The parallel tubes contain organic working fluid. Further, the solar radiation is focused upon the surface coating by a heliostat mirror field with increased efficiency. Further, the boiler comprises preheating, evaporation and superheating of the fluid in a once-through design.

KEYWORDS

     Concentrated solar receiver, organic rankine cycle, ORC, concentrated solar power, CSP, parallel tube(s), tube coating, organic working fluid, working fluid, solar radiation and solar light

DETAILED DESCRIPTION

     Organic Rankine Cycle (ORC) is named for its use of an organic, high molecular mass fluid with a liquid-vapour phase change, or boiling point, occurring at a lower temperature than water-steam phase change. The working fluid is pumped to a boiler where fluid gets evaporated and passes through a turbine then recondensed.

     Further, the ORC systems use concentrated solar power (CSP) systems to provide increased temperatures to boiler that evaporates the working fluid. The conventional CSP systems engage a heat transfer fluid such as thermal oil. The thermal oil is used to collect the solar energy in a solar receiver and heats up the fluid. Such heated fluid is then passed through the boiler to generate vapour that consequently drives the ORC.

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RP13583

     As a result, the cost incurred for the ORC system is increased. Costly oil along with an additional pump and a heat exchanger adds up the cost to overall system. Hence, results in increased cost of electricity and thus increases the capital cost.

     Therefore, there exists a need in the art for developing a feasible and affordable solar power receiving systems.

     The present invention discloses a direct concentrated solar receiver. Boiler of the ORC system described herein, acts as the solar power receiver and is directly heated by concentrated solar radiation. Figure 1, illustrates a receiver with a flow path and heat flux. The boiler consists of an array of parallel tubes that contains the organic working fluid. Such parallel tube surfaces are coated with high absorptivity matter to absorb the concentrated solar radiation in the visible spectrum and focused upon the coating by a heliostat mirror field with increased efficiency.

     The boiler or receiver preheats, evaporates and superheats the organic fluid pumped through the array pipes by absorbing the concentrated light reflected upon the boiler thereby converts absorbed light into heat on the tube surface. The organic fluid is pumped through the tubes with sufficient mass flux to enable increased inter...