Chapter hvac engineering Fundamentals: Part 1 Introduction

7.5
High-Temperature Hot Water Plants
High-temperature water (HTW) plants usually have supply water
temperatures between 350 and 450
⬚
F. This discussion also includes
plants with a supply temperature between 250 and 350
⬚
F because the
principles are similar. These systems became popular in the post-
World War II era, as an alternative to steam plants for large campus
and military-base central heating systems. The advantage is related
to the ability of water with high temperature differential to move large
quantities of heat in smaller distribution pipe. Pumping and control
may be simplified. System design pressures are similar as for high-
Design Procedures: Part 5
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