1 / 9

HVACR318 - Refrigeration II

HVACR318 - Refrigeration II. Metering Devices. Metering Devices – Four Types. Capillary Tube. Thermostatic Expansion Valve. Discharge Line. Connects the compressor to the condenser. Fixed –Bore Piston. Automatic Expansion Valve. Capillary Tubes . Low Cost Device No Moving Parts

yonah
Télécharger la présentation

HVACR318 - Refrigeration II

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HVACR318 - Refrigeration II Metering Devices

  2. Metering Devices – Four Types CapillaryTube Thermostatic Expansion Valve Discharge Line • Connects the compressor to the condenser. Fixed –Bore Piston Automatic Expansion Valve

  3. Capillary Tubes • Low Cost Device • No Moving Parts • Can be used on a wide range of applications Condenser • Rejects heat from the refrigerant

  4. Thermostatic Expansion Valve (TXV) • Most efficient • Maintains a constant evaporator superheat • Helps prevent compressor flooding

  5. TXV Types • Pressure Limiting • Balance Port • Externally equalized • Internally equalized • Electric Operated

  6. TXV Bulb Placement

  7. TXV Equalizer External Tap Location

  8. Automatic Expansion Valves • Maintain a constant evaporator pressure • Used on small systems that have constant loads

  9. Fixed-bore Metering Devices • Most common today on residential systems • Dual purpose device: • Works as a metering device • Works as a check valve • Critical charge

More Related