Grocery stores are typically found in city retail store blocks
, and strip malls; few are stand-alone buildings. Many grocery stores are “mom and pop” units supplied by nearby distributors of various food and beverage products from central distribution warehouses. It is likely that local grocery store management makes all equipment decisions.
The energy costs in grocery store operation are moderately high. Lighting, food storage cooling and refrigeration are usually the largest energy users.
Small stores often have large frontal glass areas which could result in high peak solar effects (except for north facing stores). High heat loss can also occur on cold, cloudy days. This portion of the store should be designed to offset these higher cooling and heating requirements. Entrance heaters may also be used in cold climates.
There are even exterior load and air balance considerations in the shopping mall stores with interior facing glass, especially where the intent is to keep the store doors open to encourage traffic. Obviously, the interior loads are similar whether the store is alone or within a mall.
While conventional system designs are typically used, they are not designed to produce the optimum grocery store humidity conditions, as outdoor air is mixed with return air and then cooled and dehumidified. When forced to control humidity, their energy performance is usually poor, as they are typically run to cool all the air to a lower temperature to remove moisture. This supply air is then reheated, often using refrigeration waste heat reclaim, to avoid overcooling the store.
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