Facility Piping Systems Handbook, Second Edition
Using a total systems approach, this handbook progresses from fundamentals of system and component operation to a design procedure that allows quick and accurate component and pipe sizing.
TABLE OF CONTENTS Facility Piping Systems Handbook, Second Edition
Chapter 21: HEAT EXCHANGERS
This chapter will describe the basic operation, construction, configuration and design criteria for heat exchangers (HX) commonly used to heat water and will discuss their advantages, disadvantages and application. Included will be all types of heat exchangers intended to recover waste heat, heat water for domestic purposes and other types of heat transfer purposes.
INTRODUCTION
The basic process behind the heating of all water is heat exchange, where the heat from a hot fluid (the heating medium) is given up to a colder fluid (water). This heat exchange takes place between a heating medium at a higher temperature and another medium, in our case water, at a lower temperature, in a piece of equipment called a heat exchanger specifically manufactured and designed to efficiently and cost effectively transfer the heat from one medium to another. A heat exchanger, if properly selected, installed, and maintained, could be the most trouble free piece of equipment in a water heating system.
Heat exchangers have been used to heat water for domestic and other water heating purposes in commercial and industrial applications for many years. In addition, the ever-increasing cost of energy finds heat exchangers used more and more to extract and conserve energy from hot liquid and gaseous by-products of processes that was previously wasted.
CODES AND STANDARDS
Plumbing Codes
There has been a code interpretation by many plumbing inspectors and local authorities of one section of the Uniform Plumbing Code regarding unlawful connections that affect the construction of water heaters. In a...
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