| 摘要 |
A subsidiary stage heat exchanger apparatus for a conventional condensing heater such as an oil or gas fuelled condensing boiler, comprising a vessel to receive and reserve flue gas condensate from a primary stage condensing heat exchanger of thecondensing heater and a flue gas conduit having an inlet to receive flue gas from such a primary stage heat exchanger and an outlet, the flue gas conduit defining a flow path for such flue gas; wherein the outlet of the conduit is disposed to cause flue gas to pass into the condensate reserved in the vessel in use and a heat transfer means is provided in association with, and at least partly within, the vessel for transferring heat from the condensate into the said heat transfer means. The apparatus thereby advantageously transfers heat, which is otherwise wasted, from the flue gas leaving the primary stage heat exchanger to a heat transfer medium for increased efficiency of the primary stage heat exchanger. |
