Point and Line Focusing Receiver Technologies Laltu Chandra

Point and Line Focusing Receiver Technologies Laltu Chandra Indian Institute of Technology Jodhpur chandra@iitj. ac. in

Concentrated solar thermal technologies �Line Focusing (Flux concentration: up to 100 suns) q Parabolic Trough Concentrator based q Linear Fresnel Reflector based �Point Focusing (Flux concentration: 1000 or more suns) q Dish concentrator based q Heliostat based q 1 sun = 1 k. W/m 2 q Higher flux concentration higher temperature

Line Focusing Technologies Parabolic trough (Direct solar steam Technology, PSA Spain

Receiver tube and support Diameter of absorber tube = 70 mm Diameter of receiver tube = 115 mm Length of absorber tube between support brackets = 4 m Overall length could be 1000 s of meters

Linear Fresnel Reflector

Linear Cavity Receiver This document contains company-proprietary data, and is meant for use of IITJ only.

Reflector Unit Type Reflector material Specular Reflectivity Global reflectivity Quantity Elastically curved glass mirror 3 mm thick Solar grade low iron glass – mirror from Saint. Gobain Glass, Germany 92. 5% (In 3º Cone) 93. 5 % in standard conditions, 1. 5 8 nos measured to ISO 9050, AM

Point Focusing Technologies Dish concentrator Heliostat based central solar tower PS 10 (DSG)

Tubular and Volumetric Receiver Principle of volumetric air receiver [Hoffschmidt et al. (2003)] Types of Volumetric Receivers : a) Closed volumetric receiver b) Open volumetric receiver

Closed and open volumetric air receivers Closed air receiver Open air receiver

Acknowledgements All the sources of the presented materials are hereby duly acknowledged.