May 2018
Intermediate to advanced
1160 pages
30h 12m
English
Content preview from Thermal Engineering
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Chapter 8
Steam Condensers
8.1 ❐ DEFINITION
A condenser is a closed vessel in which steam is condensed by abstracting the heat and where the pressure is maintained below atmospheric pressure.
8.2 ❐ FUNCTIONS OF A CONDENSER
There are two main functions of a condenser, which are explained below:
- To reduce the back pressure considerably upon the prime mover, and thereby increasing the work output of steam during expansion.
Consider the ideal p−v diagram of a non-condensing steam engine, as shown in Fig. 8.1(a), in which steam is supplied at pressure p1 and the exhaust takes place at atmospheric pressure p2. The work output is given by the area 1–2–3–4–5–1. If we reduce the back pressure p2 to p′2, which is below the atmospheric pressure, keeping ...
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