Investigation of exhaust gas heat recovery unit for diesel power generator

The aim of this paper is to find a proper heat recovery unit that recovers lost energy from a diesel power generator exhaust. This process is performed by inserting the exhaust gas of a 20 kVA power generator into a specifically configured shell & tube exchanger, and transferring its energy into circulating water. The carried energy is then stored in a thermal storage tank so that it would be used for a selected residential energy demand. This method is called “cogeneration”. Different configurations of heat exchanger and tank volumes are considered and flow simulations are performed in order to select a suitable recovery unit for the given design conditions.