GB936059A - Improvements in or relating to heat exchangers - Google Patents

Abstract

936,059. Heat exchangers. DELANEY GALLAY Ltd. Aug. 2, 1962 [March 21, 1962], No. 10841/62. Class 64 (3). In a heat - exchanger comprising inner, intermediate and outer sub - stantially concentric members, with chambers formed between intermediate and outer members and intermediate and inner members respectively, the intermediate member is corrugated to provide external and internal annular sub-chambers and is rotatable relative to the outer and inner members, the outer and inner members being provided with radially disposed plates which extend into said sub-chambers. In the form shown, the inner member comprises a cylindrical stator 11 having tubular extensions 12, 13 at each end providing an inlet 14 and outlet 15 for one fluid, the stator being provided with a series of annular plates 27. The intermediate member comprises a tubular rotor 18 provided with internally-extending flanges 20 which provide fluid-tight bearings between it and the inner member 11, and one end of the rotor 18 is provided with a driving pulley 21. The rotor is of corrugated form providing internal subchambers 25 into which the plates 27 project and. external sub-chambers 26. The outer member comprises a cylindrical casing 28 provided with an inlet 32 and an outlet 33 for the second fluid and having a series of internal annular plates 34 which project into the external sub-chambers 26. The casing 28 is secured to the stator 11 by a flange 30 at one end whilst a flange 31 at the other end provides a fluid-tight bearing with the rotor 18. In operation, one fluid enters through the inlet 14 passes through orifices 16 into the chamber 19, is caused to take a tortuous path in the subchambers 25 and passes from the chamber 19 through orifices 17 to the outlet 15. A second fluid, enters through the inlet 32 and is caused to take a separate tortuous path through subchambers 26 and then leaves the heat-exchanger via the outlet 33. The rotation of the rotor 18 operates to shear the boundary layers of the fluids. Some or all of the radially-disposed plates and the intermediate member 18 may be provided with turbulence promoting devices, such as wires, fins, dimples, or other deformations to further improve the heat transfer. These devices can also be used to give an efficient pumping action to either fluid passing through the heat-exchanger.