| Popis: |
This chapter introduces some of the language commonly used in dealing with steam systems, and helps energy managers both define basic design constraints and evaluate the applicability of some of the vast array of manufacturer's data and literature available in the marketplace. Today it is important to explore every possibility for improving the energy efficiency of steam systems. Air is an undesirable parasite in steam systems, and its removal is important for efficient operation. The process of heat transfer by condensation, such as in the jacket of a steam-heated vessel, is extremely efficient. High rates of heat transfer can be obtained with relatively small equipment, saving both space and capital. The energy-balance concept states that any energy put into a system with steam must be absorbed by the product and/or the equipment itself, dissipated to the environment, carried out with the product, or carried out in the condensate. |
