| 摘要 |
A self-powered heating system includes a boiler for generating steam, an expander for extracting mechanical and electrical energy from the steam and a heat exchanger for transferring heat energy from the steam to room air. A fan mounted adjacent to the heat exchanger forces room air to be heated past the heat exchanger and through the space being heated. An electric pump returns condensate from the heat exchanger to the boiler. The mechanical and electrical power for operating the fan and pump are provided by the expander. In particular, the expander extracts mechanical energy from the low pressure steam supplied by the boiler to power the fan and includes a magneto for generating an alternating current which may be converted to a direct current for powering the pump. The electrical power generated by the magneto is also sufficient to power a steam valve to the expander and a fuel valve regulating fuel flow to the burner. In another embodiment, the system includes a high pressure water heater for small-scale cogeneration of heat and electrical power. The high pressure hot water is expanded to obtain mechanical energy for driving a generator and, thereby, producing a supply of electrical power. Hot water and steam from the expander are passed through a condenser to transfer heat to a supply of secondary water. The heated secondary water may then be used for space heating purposes.
|
