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Solar assisted CHP refrigeration system.

Author(s) : EZZAHIRI S. M., INFANTE FERREIRA C. A., KRIEG J., et al.

Summary

This paper presents a study of the possibility to reduce the consumption of fossil fuel energy and related CO2 emissions in industrial refrigeration processes by integrating solar energy systems as resources. A typical food factory with ca. 3 MW refrigeration capacity requirement at two temperature levels (-23 and -10°C) has been selected for reference. A gas turbine CHP system drives both an electrically driven two-stage ammonia compression cycle and a thermally driven ammonia-water absorption refrigeration cycle. For the solar driven alternative systems, solar thermal and photovoltaic panels and also a combination of both have been considered to be applied at the available roof area of the factory. Five solar assisted alternatives have been considered: one in which thermal and photovoltaic panels deliver (part of) the balanced electrical and thermal energy requirements of the existing plant; two electrically driven options (vapour compression and Stirling cycle); and two thermally driven options (absorption and adsorption refrigeration systems). Taking the yearly solar radiation distribution for Rotterdam and Barcelona into account, the largest savings for both fuel consumption and related CO2 emissions are obtained for the system that combines the use of thermal and photovoltaic panels with the existing system (ca. 16% for Barcelona and 8% for Rotterdam). The second best option is the system that combines solar thermal panels with absorption refrigeration only (ca. 10% for Barcelona and 4% for Rotterdam). Unfortunately the required investment in solar panels is quite large, leading, for Barcelona and considering future energy prices, to an unacceptable simple pay-back time of 26 years for the combined thermal and photovoltaic panels, and 10 years for the option with solar thermal panels and absorption refrigeration only.

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Pages: 2009-5

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Details

  • Original title: Solar assisted CHP refrigeration system.
  • Record ID : 2009-2189
  • Languages: English
  • Subject: General information
  • Source: 3rd Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2009/06/23

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