Challenge
To reduce energy costs by converting waste heat from two existing Aggreko gas generators at the site into process
steam used for heat sterilising the waste plastic recycled by the Company.
Solution
Installation of a Cochran Heat Recovery Boiler to generates 2 tonnes of steam per hour.
Results
Substantially reduced energy costs and carbon footprint, plus a net energy save well in excess of £500,000 pa.
Summery
Cochran recently installed a Heat Recovery Boiler system for Evolve Polymers at Hemswell in Lincolnshire. The
project which made use of exhaust heat from two gas engines was completed in association with leading
generator hire company, Aggreko.
The two generators constantly emit exhaust gasses at in excess of 460°C; heat which was previously going to waste.
Cochran's extensive experience in Heat Recovery Boiler design enabled the company to develop a hired boiler
solution capable of utilising these previously wasted exhaust gases to generate 2 tonnes of production steam per
hour.
The cost benefit of utilising recovered 'free' exhaust heat to make steam proved key to the overall viability of this
project, effectively aligning the generated electricity costs with grid prices. This solution also offered
additional benefits, including a significant reduction in boiler fuel oil consumption. The annual cost was
£614,952, with of around £6,000 per annum: Hire of the Heat Recovery boiler costs them just £6,500 pcm, with no
additional running costs - as a result they are saving £542,952 in energy costs every year.