Cooling energy consumption

The advantages of VAV are that temperature can be controlled while minimizing energy consumption. Also, the system can be smaller because the maximum demand for cooling never occurs simultaneously in all spaces. The disadvantages are the additional space required for die air-handling plants and ductwork. 

Natural cold sources show the highest energy efficiency as cold is for free or with little energy consumption. However, they might have restrictions with respect to reliability (warm summer nights) and cooling power (small temperature differences). 

Pressure Drop. Baffling must be designed to keep the pressure drop as low as possible. The higher the pressure drop, the higher the energy consumption and the harder the job of attaining proper vent end sub-cooling. Pressure drop is lower at the outlet end because of smaller mass flow. 

Steam is available at 180°C and cooling water at 20°C. Clearly, it is possible to heat the cold stream using steam and cool the hot stream, in Table 16.1, using cooling water. However, this would incur excessive energy cost. It is also incompatible with the goals of sustainable industrial activity, which call for use of the minimum energy consumption. Instead, it is preferable to try to... 

Research associated with the machine level has been concentrated in two subcategories the energy consumption of the machine for the work done processes and the energy requirement of the machine for auxiliary processes (e.g., cooling and control). 

In the life cycle phases of product manufacturing, the focus of resource efficiency moves from the material applied per unit to resources used in the various production phases, for example, cooling lubricants, compressed air or hydraulic oil and on the energy requirements of the production processes [24]. Process relevant information is based on equipment energy consumption curves. Each curve is specific to a production equipment item and enables an accurate determination of the energy consumption of the item over the production time. 

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