Share

A FLOW REGULATION SYSTEM FOR DRY EXPANSION EVAPORATORS.

Author(s) : JAMES R. W., EFTEKHARI M.

Type of article: Periodical article

Summary

A THERMOSTATIC EXPANSION VALVE REQUIRES A RELATIVELY HIGH SUPE RHEAT FOR STABLE OPERATION AND MUST BE BACKED BY A CONSIDERABLE VOLUME OF CONDENSATE. ALSO, UNLESS OVERSIZED, A LIMIT IS IMPOSED ON THE FALL OF CONDENSING PRESSURE. TO EFFECT BETTER USE OF EVAPORATOR SURFACE AND ECONOMY WITH DECREASED CONDENSER HEAT SINK TEMPERATURE, A HIGH PRESSURE FLOAT EXPANSION VALVE IS SUGGESTED WITH A NOVEL ADDITION TO MAINTAIN SUFFICIENT SUPERHEAT AT EVAPORATOR OUTLET UNDER VARYING LOAD CONDITIONS, FULL USE OF EVAPORATOR SURFACE, AND CONTROL UNDER LOW CONDENSER PRESSURE. THIS ADDITION IS A COMPENSATING CHAMBER CONNECTED BY A BRANCH FROM THE FLOAT VALVE OUTLET, AND IN WHICH A HEAT EXCHANGE TAKES PLACEWITH SUCTION VAPOUR. SUCTION SUPERHEAT DRIVES ADDITIONAL LIQUID INTO THE EVAPORATOR INLET, FALLING SUPERHEAT CONDENSES VAPOUR IN THE CHAMBER, THUS REMOVING LIQUID FROM THE EVAPORATOR. VARIATIONS ARE DESCRIBED FOR FLOODED EVAPORATORS AND SYSTEMS WITH LIUIOSTE. D.W.H.

Details

  • Original title: A FLOW REGULATION SYSTEM FOR DRY EXPANSION EVAPORATORS.
  • Record ID : 1991-2577
  • Languages: English
  • Source: Inst. Refrig., Adv. Proof - 7 p.; 5 fig.; 3 tabl.; 6 ref.; 2 append.
  • Publication date: 1991/03/14

Links


See the source

Indexing