In such a condenser as shown in Fig. 8.8, the steam passages are all around the periphery of the shell. The exhaust steam converges to the centre of the shell where there are no tubes. The air is removed by the air pump suction from the centre. Some of the exhaust steam also passes to the centre and gets condensed. The condensate is reheated to nearly the temperature of the exhaust steam. The pressure drop of steam is also reduced due to large flow passages.
Figure 8.8 Central flow surface condenser
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