Useful thermal energy output
Useful thermal energy output of a topping-cycle cogeneration facility means the thermal energy:
(1) That is made available to an industrial or commercial process (net of any heat contained in condensate return and/or makeup water);
(2) That is used in a heating application (e.g., space heating, domestic hot water heating);
(3) That is used in a space cooling application (i.e., thermal energy used by an absorption chiller); or
(4) That is used by a fuel cell system with an integrated steam hydrocarbon reformation process for production of fuel for electricity generation.