Abstract
The paper describes an analysis of the application of a combined heating, refrigeration and power (CHRP) system to the chilled food industry from the perspective of energy, economic and environmental factors. It is based on theoretical and practical findings from a CHRP research project at Brunel University. The CHRP test facility employs an 80 kWe modular microgas turbine producing electrical and thermal energy for process and site use with excess heat converted into refrigeration via a 12 kWc thermally driven low temperature absorption refrigeration unit.A 1000 kg h–1 chilled dairy product plant has been considered for the analysis. The plant has energy demand of 52˙5 kWe for electrical power, 36 kWth for process heating and 55 kWc for process cooling. For the plant selected, the use of the CHRP system can provide annual primary energy savings of 27%, payback time of 3˙7 years and CO2 emission savings of 76 t per annum based on utilisation of one unit of microgas turbine and five units of absorption chillers.
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