spiraxsarco.com/uk
Case study 2: Biofuel plant gensets
A biofuel plant, based in the UK, installed a double water vessel heat exchanger to recover energy from its gensets. The Spirax Sarco solution was a bespoke design of an irregular shape, to take account of the large duct diameter, which necessitated a large cross sectional area on the unit. The application recovered 750 KW of energy with a value of £175,000 per annum. The payback on this application for the customer was less than six months.
Exhaust temperature in / out Water temperature in / out ([KDXVWZDWHUPDVVÀRZ
440°C / 371°C
75°C / 98°C
46,500kg/h / 36,210kg/h
Weight of unit
1,556kg 850Pa 750kW
Exhaust pressure drop
Energy recovered
Recovered energy value
£175k p/a
Case study 3: Gas to water food processing boiler
6PRRWKSLSHKHDWH[FKDQJHU¿WWHGWRDIRRGSURFHVVLQJERLOHU The application suffered from high particulate matter exhaust from the furnace. The Spirax Sarco solution was to install a gas-to-water heat pipe heat exchanger, with a soot trap and removable panels for easy cleaning. The company now has a low fouling, low maintenance, high reliability heat exchanger capable of recovering £82,000 of energy per annum for a capital investment of £40,000, offering a payback period of less than a year.
Exhaust temperature in / out Water temperature in / out ([KDXVWZDWHUPDVVÀRZ
236°C / 158°C 105°C / 131°C
18,675kg/h / 6,374kg/h
Weight of unit
3,600kg 650Pa 440kW £82k p/a
Exhaust pressure drop
Energy recovered
Recovered energy value
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