| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve a heat exchange efficiency of a water heat exchanger of a hot water supply unit using a supercritical heat pump. SOLUTION: A refrigerant is supplied into many fine tubes 223 to heat- exchange the refrigerant with supplied hot water. Thus, a flowing speed of the refrigerant flowing through the tubes 223 is accelerated to increase a heat transfer rate between the refrigerant and the tubes 223 and a heat transfer area (contact area) of the refrigerant with the tube 223 is increased. Accordingly, the heat transfer rate and the heat transfer area (contact area) can be remarkably increased as compared with that of a simple double cylindrical heat exchanger.</p> |
