AVAILABILITY MODEL FOR A COGENERATION SYSTEM SUBJECTED TO REDUNDANCY

The main emphasis of cogeneration system is to provide electrical energy, steam, hot
and chilled water to their customers. The failure of this system could lead to the
disruption of the supply of these items. If failure occurs, it will result in reduction of
availability as well as economic loss. In order to mitigate such effects, it is required to
study availability of the cogeneration system together with associated economic loss.
However, there are factors which affect the availability assessment of the
cogeneration system. These factors are system redundancy and limitation of
maintenance data. Use of redundancy in cogeneration helps to achieve higher
availability but the operation cost of redundancy is expensive due to maximum
demand charge cost.