| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance stability of heat source machine operation when reducing the number of heat source units operated. <P>SOLUTION: This constitution is provided for arranging an output control means for adjusting the number of cabins of heat source units and a primary pump flow rate of the heat source units being in an operation state in response to a load calorific value of a load device by interposing a plurality of heat source units in parallel in a heating medium circulating passage to the load device, and is provided with a short-circuit circulating passage for short-circuiting a heating medium outlet and a heating medium inlet in the heat source units and a short-circuit valve for opening-closing this short-circuit circulating passage. The output control means is constituted for increasing the primary pump flow rate of the heat source units being a nonstop object, reducing the primary pump flow rate of the heat source units being a stopping object up to a lower limit heating medium flow rate of a corresponding heat source machine, and also stopping operation of the heat source units being the stopping object in its state by short-circuiting and circulating a partial heating medium among the primary pump flow rate via the short-circuit circulating passage by opening the short-circuit valve of the heat source unit being the stopping object, when reducing the number of the heat source units operated. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
