Fuel-cell co-generation system, of electrical energy and hot water

摘要

A fuel-cell cogeneration system of electrical energy and hot water includes an off-gas burner for burning an off-gas from an anode electrode of a fuel cell, a reformer including a reformer burner for burning a mixture of air and fuel, a first heat exchanger provided at a downstream-side of stack cooling water, wherein the first heat exchanger is adapted to exchange heat from the off-gas burner with the stack cooling water from the fuel cell, to heat the stack cooling water, and a switch for switching a direction of flow of a reformed gas from the reformer, depending on an operation condition of the system and a demand for the hot water.