Transcription of CHAPTER Utilities and Energy Efficient Design 3
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CHAPTER Utilities and Energy Efficient Design 3
CHAPTER3 Utilities and Energy Efficient DesignKEY LEARNING OBJECTIVES How processes are heated and cooled The systems used for delivering steam, cooling water, and other site Utilities Methods used for recovering process waste heat How to use the pinch Design method to optimize process heat recovery How to Design a heat - exchanger network How Energy is managed in batch few chemical processes are carried out entirely at ambient temperature. Most require processstreams to be heated or cooled to reach the desired operation temperature, to add or remove heatsof reaction, mixing, adsorption, etc., to sterilize feed streams, or to cause vaporization or condensa-tion. Gas and liquid streams are usually heated or cooled by indirect heat exchange with anotherfluid: either another process stream or a utility stream such as steam, hot oil, cooling water, orrefrigerant.
heat. Section 3.3 introduces other heat recovery approaches. When it is economically attractive, heating and cooling are accomplished by heat recovery between process streams. The design of a network of heat exchangers for heat recovery can be a complex task if there are many hot and cold streams in a process. Pinch analysis, introduced in
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