Abstract
This paper covers the development of a cogeneration (combined heat and power) system based upon a compression ignition, reciprocating, internal combustion engine and a standard three-pass economic shell-and-tube industrial boiler as well as the first commercial application of the system. An innovative feature of this cogeneration system is that additional fuel is burnt to utilize the free oxygen in the engine exhaust gas (a practice common with gas turbines but rarely attempted with reciprocating engines) to provide a significant, fuel-efficient and easily variable increase in the high-quality heat, that is steam, output from the system. The initial development work was done in 1983 using heavy fuel oil as the fuel to both engine and burner, while the first commercial application in 1988 utilizes a dual-fuel engine (gas and diesel oil pilot or diesel oil) and dual firing of the exhaust gas duct burner with gas or diesel oil.
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