Characterization of cooling loads in the wine industry and novel seasonal indicator for reliable assessment of energy saving through retrofit of chillers

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Abstract

The food sector is a major consumer of energy and growing efforts are being made in the search for solutions thatwill guarantee the efficient and sustainable use of energy resources. Among the different sectors, wineries areattracting particular interest due to the continuous growth of the global market and production. Surveys conductedin the winemaking sector have highlighted the importance of performing accurate energy audits and haveidentified the installation of efficient refrigeration systems as a promising solution in a variety of cases.Unfortunately, the savings achievable by efficient cooling technologies are often estimated using simplifiedapproaches which do not take into consideration the actual operating conditions of the equipment typicallyvariable on seasonal and daily bases. In this paper a novel bottom-up procedure is presented, aimed at developingreliable profiles for refrigeration and air-conditioning loads and at assessing the extent to which moreefficient chilling units could contribute to reducing electricity consumption. The use of standard Seasonal EnergyEfficiency Ratios is critically discussed and a novel customized indicator is proposed. The method is applied to amedium-scale winery producing still red and white wines and sparkling wines, for which only aggregated energyconsumption data are available. After deriving detailed load profiles, it is proven that the use of standard seasonalindicators leads to 56.85% and 83.87% overestimation of potential energy savings, respectively, for lowand medium temperature cooling energy uses, confirming the importance of adopting seasonal indicators customizedon the actual operating conditions of chillers.
Lingua originaleEnglish
pagine (da-a)1-16
Numero di pagine16
RivistaApplied Energy
Volume266
Stato di pubblicazionePublished - 2020

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

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