The refrigeration of chilled foods 89 Piping Evaporator condensing Floot Fig. 4.4 Modular cold room for low ceiling height accommodation low ceiling height is illustrated in Fig. 4.4. Many other arrangements are possible, dependent on local requirements For larger stores, a basic requirement is the consideration of product movements and handling methods. This will dictate store height, whether or not a fixed racking system lor pallet or carton storage is required, and how large dhc store should be. It is very common for large stores to be designed for specific applications, and for them to be used for something quite different after a few years, so flexibility of possible use should be designed in. Large stores should have provision for subdivision without major structural alteration. Refrigeration evaporators, from which the cooled air is circulated, may be mounted at one end of the store or at high level on one wall, or at high level within a central ridge. Whatever the arrangement, it is essential to consider the pattern of air movement for every likely store loading pattern, and ensure there is sufficient fan power to provide even temperatures. Most of the general considerations listed above for cook-chill stores also apply to larger stores Many stores have been constructed in which a steel structure is used to support an internal insulation barrier, but increasingly this design is being superseded by pre-formed panel constructions in which the interlocking panels are self-supporting. In suitable applications, the latter system offers appreciable cost In designing any large store, it is essential to consider protection of vehicles nd products during loading and unloading operations. Protection against sun and rain is essential, and in more critical operations, temperature-controlled loading bays may be necessarylow ceiling height is illustrated in Fig. 4.4. Many other arrangements are possible, dependent on local requirements. For larger stores, a basic requirement is the consideration of product movements and handling methods. This will dictate store height, whether or not a fixed racking system for pallet or carton storage is required, and how large the store should be. It is very common for large stores to be designed for specific applications, and for them to be used for something quite different after a few years, so flexibility of possible use should be designed in. Large stores should have provision for subdivision without major structural alteration. Refrigeration evaporators, from which the cooled air is circulated, may be mounted at one end of the store, or at high level on one wall, or at high level within a central ridge. Whatever the arrangement, it is essential to consider the pattern of air movement for every likely store loading pattern, and ensure there is sufficient fan power to provide even temperatures. Most of the general considerations listed above for cook-chill stores also apply to larger stores. Many stores have been constructed in which a steel structure is used to support an internal insulation barrier, but increasingly this design is being superseded by pre-formed panel constructions in which the interlocking panels are self-supporting. In suitable applications, the latter system offers appreciable cost savings. In designing any large store, it is essential to consider protection of vehicles and products during loading and unloading operations. Protection against sun and rain is essential, and in more critical operations, temperature-controlled loading bays may be necessary. Fig. 4.4 Modular cold room for low ceiling height accommodation. The refrigeration of chilled foods 89