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Integration of refrigeration and HVAC in supermarkets.

Number: pap. n. 184

Author(s) : NORDTVEDT T. S., HAFNER A.

Summary

Supermarkets have major impact in energy power consumption compared to other buildings in commercial activities. In fact the electric energy amount for heating/ventilation and air conditioning (HVAC), hot water and refrigeration utilities in supermarkets requires about 4% of the country's total electricity production in the United States and France and around 3% in Sweden. Thus, just a percentage in reduction represents a high improvement in terms of global energy saving, but this is difficult to perform because many factors are involved, e.g. ambient and indoor air temperatures, relative humidity, building envelope, store opening time, people presence and many others. In this work, the integration of a R744 (CO2) refrigeration system with a heating and ventilation of an existing supermarket has been evaluated. Some measurements of energy usage, opening hours, thermal loads of products and air temperature have been performed. Many ideas have been introduced in order to reduce the energy consumption; some of these are more beneficial compared to others. Therefore a system approach must be taken, evaluating various parameters at the same time. Proposals will be given on how to integrate and control a combined R744 refrigeration unit which delivers all heat to the HVAC unit. Energy storage issues are also discusses.

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Pages: 8 p.

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Details

  • Original title: Integration of refrigeration and HVAC in supermarkets.
  • Record ID : 30004325
  • Languages: English
  • Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
  • Publication date: 2012/06/25

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