FLOW PATH OF HEAT TRANSMITTING SURFACE FORMED WITH EXPANDED FLOW PATH AND DIFFUSER TYPE HEAT EXCHANGER UTILIZING THE SAME

摘要

PURPOSE:To improve the efficiency thereof by a method wherein the sectional area of the flow path is increased as it goes to the down-stream thereof, the length of the flow path is made larger than the hydraulic diameter of the section of an inlet and the static pressure of an operating fluid at the outlet thereof is increased than the same at the inlet thereof. CONSTITUTION:The operating fluid a is flowed from the inlet port of the flow path, having the sectional area of Ai and the hydraulic diameter of Di, into the direction shown by an arrow sign and is arrived and discharged at the outlet of the flow path having the sectional area of Ae during effecting heat transmission between the peripheral wall, the whole or a part of which is acting as a heat transmitting surface, while it flows through the division of the flow path having a length L which means the length of a line connecting the centers of the sections to the outlet port. The sectional area of this flow path is increased as it goes to the downstream from the inlet to the outlet thereof, therefore, the area Ae is larger than the same Ai always. According to this method, the rate of a heat transmitting rate to a driving power may be improved remarkably.