Tuesday, 19 July 2016
Waste Heat Recovery Systems on DG Set Exhausts.
Everything around us works on energy in some form or the other. So to protect, save and re-purpose energy is truly the need of the hour. From a cosmic concept like that emerges a device of more systemic nature, ‘Waste Heat Recovery Systems’. A waste heat recovery unit (WHRU) is an energy recovery heat exchange that recovers heat from hot streams with potential high energy content, such as hot flue gases from a diesel generator. Waste heat found in the exhaust gas of various processes or even from the exhaust stream of a conditioning unit can be used to preheat the incoming gas. This is one of the basic methods for recovery of waste heat. One uses this process as an economic method.
Waste heat recovery- Pressurized Hot water generators:
These units can be used on a maximum of 2 DG sets of 750 KVA each with an exhaust temperature of upto 450 degree Celsius. The heat recovery is a massive 470000 Kcal/Hr and can work upto 8 hours a day. The unit provides around 44 Lakh worth of savings annually.
A single unit can be connected to 2 units with an exhaust temperature bearing capacity of 500 degree Celsius. The heat recovery is as high as 380000kCal/Hr with an annual saving of 34 Lakhs.
With a capacity of 20 Lac Kcal/hr and a FO firing rate of 180 kg/hr this device can handle exhaust temperatures upto 250 degree Celsius. The heat recovery is 65000kCal/hour and gives an annual saving of 12 Lac.
This device can be used on decarb furnaces with exhaust capacities upto 280 degree Celsius. With heat recovery of 22000kCal/hr the annual savings is upto 9 lakhs.
With a functioning capacity of 500 kg/hr at 40 kg/cm2 and an exhaust temperature of 350 degree Celsius, this device can efficiently handle heat recovery upto 30000 k cal/hr. giving an annual saving of 7.5 lakhs.
Waste Heat Recovery - Hot Water Generator:
Usually used for heat treatment furnaces with an exhaust temperature of 400 degree Celsius & an HSD firing rate of 40 kg/hour this equipment can handle heat recovery of upto 100000kCal/hour and save upto 16 lakhs.