| 摘要 |
<p>In a heating and cooling system having a plurality of zones to be heated and cooled, a heat exchange unit in each of the zones, a hot water piping circuit including a water heater and a first pump on the inlet side of the water heater for circulating hot water to and from each of the heat exchange units and a separate chilled water piping circuit including a water chiller and a second pump on the inlet side of the water chiller for circulating chilled water to and from each of the heat exchange units; further providing a valve and pipe system for selectively and mutually exclusively placing the water heater in fluid communication with the chilled water circuit, whereby the chilled water circuit may be utilized to circulate hot water during periods of high heat demand; and placing the water chiller in fluid communication with the hot water circuit, whereby the hot water circuit may be utilized to circulate chilled water during periods of high cooling demands.</p> |
