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Full Text:	L E G A C Y 518 K View Full Text Access Individual Pages  -   Search, view and/or download individual pages
Title:	Chapter 11. Heat Exchangers
Creator/Author:	Rafferty, Kevin D. ; Culver, Gene
Publication Date:	1998 Jan 01
OSTI Identifier:	OSTI 895110
Report Number(s):	None
DOE Contract Number:
Document Type:	Book
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Coverage:
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Research Org:	Geo-Heat Center, Klamath Falls, Oregon
Sponsoring Org:	USDOE
Subject:	15 GEOTHERMAL ENERGY
Keywords:	Geothermal Legacy
Description/Abstract:	Most geothermal fluids, because of their elevated temperature, contain a variety of dissolved chemicals. These chemicals are frequently corrosive toward standard materials of construction. As a result, it is advisable in most cases to isolate the geothermal fluid from the process to which heat is being transferred. The task of heat transfer from the geothermal fluid to a closed process loop is most often handled by a plate heat exchanger. The two most common types used in geothermal applications are: bolted and brazed. For smaller systems, in geothermal resource areas of a specific character, downhole heat exchangers (DHEs) provide a unique means of heat extraction. These devices eliminate the requirement for physical removal of fluid from the well. For this reason, DHE-based systems avoid entirely the environmental and practical problems associated with fluid disposal. Shell and tube heat exchangers play only a minor role in low-temperature, direct-use systems. These units have been in common use in industrial applications for many years and, as a result, are well understood. For these reasons, shell and tube heat exchangers will not be covered in this chapter.
Publisher:
Country of Publication:	US
Language:	English
Size/Format:	Medium: ED
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System Entry Date:	2008 Oct 06
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