| 摘要 |
An extended-dwell heat-exchange conduit for use, for example, to remove heat from the header pipe of a solar collecting panel comprises a supply pipe (12), a co-axial intermediate pipe (10) and a co-axial outer pipe (20) fitted with a reducer (26) at its outlet end. The pipes (10, 12, 20) are maintained in spaced relationship by spacers (14) and (22). Also disclosed is a solar heating system comprising a solar collector (54), a heat pump or engine (58) arranged to receive heat-exchange medium from the solar collector, and a heat sump (56) connected to receive uprated heat from the heat pump or engine via a heat-exchange medium. The heat sump contains liquid which may be circulated to heat storage means, heat radiating means (70), hot water heating means and/or steam-generating means. |
