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Industrial Water Heating



Preheating Boiler Feed Water



Solar ETC Collector at Prara Leathers Pvt Ltd


Project Overview

  • M/s. Prara Leathers Pvt Ltd, Ranipet processes finished leather. The company uses hot water generated in an insulated storage tank of capacity 25 KL using steam mixing.
  • A 3 ton thermax boiler is used to produce steam using firewood at the rate of 250 – 280 kg/hr. A solenoid valve system fitted with steam is used to control the water temperature to 65℃ in the 25 KL tank.
  • As the site receives solar radiations for more than 300 days/year, SUN BEST had installed a roof mounted Evacuated Tubes Collectors (ETC) system of capacity 50,000 – 60000 LPD solar water heaters to reduce firewood consumption in the boiler as well as to promote clean energy in leather processing.
  • 196 ETC collectors are divided into four groups and fitted on the roof of the factory.
  • Each 49 x 2 Nos ETCs are connected in a primary loop with expansion tank, pump, auto refilling water and a plate heat exchanger.


SUN BEST Solution


  • 196 ETC collectors are divided into four groups and fitted on the roof of the factory.
  • Each 49 x 2 Nos ETCs are connected in a primary loop with expansion tank, pump, auto refilling water and a plate heat exchanger.
  • The secondary loop consisted of cold storage water and pump coupled to the plate heat exchanger. The primary loop works at a temperature of 75-80℃.
  • The cold water passes through the PHE and gets heated up to a temperature of 65℃ and it is taken to the process.



Benefits

The system saves:

  • 375 tonnes/year of firewood
  • An emission reduction of 10089 tonnes of CO2 in 15 years
  • An equivalent of 23507 acres of forest saving.