Minimize Exposure To Heat

Many of refrigerated warehouses, face serious problems with high energy consumption, accumulation of ice around doorways, freezing and wet floor. They largely caused by excessive amounts of warm outside air entering the installation at the loading Bay. In - 10 C, the air can hold only about 2g/m3. Table 3.3 shows a comparison of the heat penetration through the same size doors open air conditioned room and a cold store at -16C. Provision of entrance hall, providing an additional high-speed door (Fig. 3.2) between refrigerating chamber and a hallway, and ensuring docking alignment (Fig. 3.3) for sealing the back of the truck to the building are some of the methods to reduce the penetration of air in the cold store during loading and unloading operations.

High speed doors are made of light weight, flexible materials for strength. They have a minimum insulation properties, but because the air exchange is the dominant mode of cooling loss, the door's speed becomes more important in the fight cooling losses than its insulating properties. Modern high speed door will be open for approximately 10 seconds, in one pass. Entrance hall combined with the speed of the door refrigeration reduce air infiltration from 2,900 to 700 cubic meters per truck cargo movement, 76 percent reduction.

Registration and Maintenance of Insulation

Repair of damaged insulation after regular inspections. Isolate hot or cold surface. Replace wet insulation. Isolate HVAC ducts, running outside and through the vacant space. Ensure, in accordance with deck insulation on the ceiling of the top floor air-conditioned buildings.

Insulate Pipes Fittings

As a rule, cooling water/brine tanks, pipelines and end-use equipment in the industry are well insulated. However, valves, flanges, and others are often left bare. With rising energy costs, it pays to insulate pipes, flanges, valves, cooling water and brine pumps and others (Fig. 3.4). Pre-formed insulation or home box, type of insulation.

Using Landscaping to Reduce Solar Heat Load

During the design of buildings, fountains and water currents can be used evaporative cooling and act as heat sinks. Trees can be grown around the building, to reduce the penetration of heat through the Windows, and reduce glare.

Reduce the Excessive Use of Glass in Buildings

Modern commercial buildings (Fig. 3.5) glass facades and/or large window area (almost 30% of the wall area) as a result of the large amount of solar heat and heat transfer.

This architecture is suitable for cold countries, while in India this increases the air conditioning load for about eight to ten months a year. In the existing building, the possibility of replacing glasses, laminated plates of warmlyisolation should be seriously considered. Color plates can be selected in accordance with internal and external decor. Glass facades, if desired, can be presented in the form of a glass curtain external to the Convention wall with the necessary area of a window.

The use of Glass with Low Solar Heat Gain Coefficient (SHGC) and thermal conductivity table 3.4 shows the CCP, thermal Conductivity and Daylight Bandwidth for different types of glasses. The use of glass with low SHGC and thermal conductivity recommended. Daylight transmittance important if electric lighting (other thermal load) must be minimized.

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