| 摘要 |
<p>A system for the control of flow of heating fluid to a thermal load (10) comprises an arrangement of conduits including a fluid inlet conduit (4) for connection to a source of heated fluid through which hot fluid is passed to the thermal load (10), and a fluid return conduit (6) through which cooled fluid from the thermal load is returned to the source, including a conduit portion (BC) adapted to receive both cooled fluid from the thermal load and a proportion of hot inlet fluid in response to an oversupply of hot fluid, flow regulation means (12) arranged in the fluid inlet conduit (4), a first temperature sensor (P) located in the return conduit (6) to detect only cooled fluid from the fluid load, and a second temperature sensor (Q) disposed in said conduit portion, and control means (14) adapted to receive the signals from said sensors (P,Q) and to adjust the flow regulation means (12) in response to a differential in temperature between the temperatures indicated by the first and second temperature sensors. <IMAGE></p> |
