Open chilled display cabinet curtain / door retrofit
FAB02
Open display cabinets offer the ultimate in user accessibility, however this comes at an energy cost. The open arrangement results in ineffective temperature control and a need for regular cycling of the chiller compressor.
Open chilled goods display refrigerators are an obvious contributor to your building baseload. A number of aspects can be considered to reduce energy consumption as far as is practicable.
Door / curtain retrofit will immediately reduce the heat gain within the unit from the surrounding ambient temperature, resulting in less need for the refrigerators compressor to operate, directly resulting in an energy save. This is a more technical subject than it may first appear, as it may fundamentally alter the operating characteristics of the refrigerator components, potentially causing negative compressor impacts. A useful guide is attached from the US Department of Energy, which explores the subject at length. While the document was written sometime ago it does provide an in-depth guide to the subject. Do not let the potential challenges dissuade you, there are some good energy saves to be made here and it should be fully exploited.
US Department of Energy chilled display cabinet retrofit guide
These providers will be able to assist in executing this completing conservation measure
Display cabinet lighting
Many of these cabinets operate with inefficient fluorescent tube lighting. These contribute to two forms of energy waste, the first is the waste of energy in producing the light level required. The second loss results in the need for more refrigeration to chill the heat given off by the fluorescent tubes. Retrofitting low energy LED lighting reduces both of these two sources of energy loss.
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Operating hours
The applicability of this aspect is influenced by the nature of the stored products, if you a chilling non-perishable goods it may be feasible to switch the chilled display unit off for a number of hours each night and for much of the weekend, with sufficient time allowed for the product to be re-chilled before the next planned sale period. A simple timer plug can achieve this automated time control.