part 1: overview of cogeneration and its status in asia - Fire
part 1: overview of cogeneration and its status in asia - Fire
part 1: overview of cogeneration and its status in asia - Fire
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108 Part3: Summary <strong>of</strong> country studies – Bangladesh <strong>and</strong> Viet Nam<br />
Diesel Eng<strong>in</strong>e<br />
Figure 2.3 Typical reciprocat<strong>in</strong>g eng<strong>in</strong>e <strong>cogeneration</strong> system<br />
The power to heat ratio for the reciprocat<strong>in</strong>g eng<strong>in</strong>e <strong>cogeneration</strong> system can be calculated<br />
by:<br />
PHR =<br />
Coolers<br />
ηeng<strong>in</strong>e<br />
η × η<br />
exhaust hrsg<br />
= ηeng<strong>in</strong>e<br />
× ( H o − H fw)<br />
ηexhaust × ηhrsg<br />
× 3. 6<br />
[kWe/kWth]<br />
[kWe/(ton/hr <strong>of</strong> Steam)]<br />
where, ηeng<strong>in</strong>e = percentage <strong>of</strong> eng<strong>in</strong>e electric output<br />
ηexhaust = percentage <strong>of</strong> exhaust heat<br />
ηhrsg = efficiency <strong>of</strong> heat recovery steam generator<br />
Ho<br />
Hfw<br />
~ 450 O C<br />
Oil Air Water<br />
Exhaust<br />
Heat<br />
= enthalpy <strong>of</strong> process steam, kJ/kg<br />
= enthalpy <strong>of</strong> feedwater, kJ/kg<br />
~ 200 O C<br />
Heat Recovery Steam Generator<br />
Table 2.4 Typical energy distribution (per cent) for reciprocat<strong>in</strong>g eng<strong>in</strong>es<br />
Size 60 kW 230-840 kW 1,200-2,400 kW<br />
Electric Output 26 33 35<br />
Cool<strong>in</strong>g 23 30 29<br />
Exhaust 47 30 29<br />
Losses 4 7 7<br />
G<br />
Process<br />
Total (Fuel Input) 100 per cent 100 per cent 100 per cent<br />
The power generation, steam generation <strong>and</strong> fuel consumption are calculated as follows:<br />
Steam
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