supermarket refrigerated showcase » article > display refrigerator > supermarket refrigerated showcase two-stage compression refrigeration cycle and cascade refrigeration cycle
supermarket refrigerated showcase two-stage compression refrigeration cycle and cascade refrigeration cycle
supermarket refrigerated showcase two-stage compression refrigeration cycle and cascade refrigeration cycle
1. supermarket refrigerated showcase two-stage compression refrigeration cycle
1) two-stage throttling and complete intercooling double In the stage compression refrigeration cycle, the refrigerant vapor from the evaporator is compressed to an intermediate pressure by the low-pressure stage compressor, and then enters the flash intercooler to be cooled into saturated vapor (complete intercooling). The
high-pressure compressor sucks in vapor from the intercooler and compresses it to the condensing pressure, and then sends it to the condenser to condense into a saturated liquid. After the first stage throttling, the liquid enters the intercooler, the gas and liquid are separated, and a small part of the liquid is vaporized to cool the exhaust of the low-pressure stage compressor. Most of the liquid enters the evaporator after the second-stage throttling, absorbs heat and vaporizes to achieve the purpose of refrigeration. The vapor sucked by the high-pressure stage compressor should include the exhaust of the low-pressure stage compressor, the separated vapor after the first stage throttling, and the vaporized vapor for cooling the low-pressure stage exhaust. This cycle reduces throttling loss and superheat loss, and the compressor discharge temperature is significantly reduced: the compression ratio of the high and low pressure stage compressors is much smaller than that of the single stage, which is beneficial to improve the volumetric efficiency of the compressor.
2) A two-stage compression refrigeration cycle with one-stage throttling and complete intercooling. The difference between this cycle and the above-mentioned cycle is that a coil-type intercooler is used instead of a flash-type intercooler. After the refrigerant liquid from the condenser to the evaporator is subcooled in the intercooler, it is throttled to the evaporation pressure by a first stage. A small part of the liquid from the condenser is throttled and enters the intercooler to vaporize and absorb heat, which is used to cool the low-pressure stage exhaust gas and supercool the mainstream liquid. This system can avoid the flash vapor generated by the saturated liquid in the pipe before the second-stage throttling in the system and affect the operation of the expansion valve. However, after the coil-type intercooler is used, due to the heat transfer temperature difference, the temperature of the mainstream liquid after being subcooled reaches Less than the saturation temperature under the intermediate pressure.
The above articles are from refrigerated showcase supermarket refrigerated showcase and supermarket refrigerated showcase
. For details, please log in: www.ihdjx.com Free Order Hotline: +86 18019567573 Contact: Mr. Shao 26066250@qq.com
keywords:
Ranking of similar articles
- Dragon fruit reveals ark makes pitaya ornamental fruit
- May 2011 refrigerated showcase Qingyuan Tour
- walk-in cooler disassembly and maintenance method
- Represent the frozen watermelon fruit for storage
- 2012 take care of the old man from the supermarket refrigerated showcase
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- 2013 refrigerated showcase ltd. refrigeration lunar New Year holiday notice
- The structure and working principle of computer-based supermarket refrigerated showcase
- Commercial refrigeration evaporator embedment and production (6)
- Air-conditioner noise?
- The rapid growth of the supermarket walk-in cooler market in refrigeration equipment
- walk-in cooler refrigeration failure and maintenance method (5)
- The air-conditioner doesn't automatically melt frost failure analysis
- display cases Refrigeration failures and maintenance methods (9)
- The general principle of design and layout of display cooler refrigeration system
- Walk-in cooler secondary failure unit refrigeration difference analysis (2)
Latest news articles
- May 2011 refrigerated showcase Qingyuan Tour
- refrigerated showcase Refrigeration Equipment Co., Ltd. growth process
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase display cooler written commercial display cooler legend
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- 2012 take care of the old man from the supermarket refrigerated showcase
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- Dragon fruit reveals ark makes pitaya ornamental fruit
- Watermelon fresh-keeping refrigerator can better preserve the nutrients of watermelon
- Represent the frozen watermelon fruit for storage
- Hairy crabs freezer frozen taste more fresh
- How hairy crabs fresh refrigerated showcase display cooler tell you
- Large supermarket display ark how to choose the right goods
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- Refrigerated showcase ltd. refrigeration has been a leader in innovation and energy saving
- In September 2012, refrigerated showcase west chung
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Correctly use refrigerated showcase supermarket refrigerated showcase the matters needing attention
- , a refrigerated display showcase meat cooler features of the product
- Refrigerated showcase walk - in the cooler is icy