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Truck refrigeration system consists of four parts: compressor, condenser, expansion valve and evaporator.
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The compressor is the power of the refrigeration cycle and is driven by an electric motor to continuously rotate. It can not only extract the vapor in the evaporator in time, maintain low temperature and low pressure, but also increase the pressure and temperature of the refrigerant vapor through the compression function, creating conditions to transfer the heat of the refrigerant vapor to the external environment medium. In other words, the low-temperature and low-pressure refrigerant vapor is compressed to a high-temperature and high-pressure state, and room temperature air or water is used as a cooling medium to condense the refrigerant vapor.
The function of the compressor is to compress low-pressure steam into high-pressure steam, thereby reducing steam volume and increasing pressure. The compressor sucks the working medium vapor with lower pressure from the evaporator, and sends it to the condenser after the pressure increases. The high-pressure liquid is condensed in the condenser. After being throttled by the throttle valve, it becomes a low-pressure liquid and is sent to the evaporator. In the evaporator, it absorbs heat and evaporates into low-pressure steam, which is then sent to the compressor inlet to complete the refrigeration cycle.
The condenser is a heat exchange device that uses the ambient cooling medium (air or water) to take the heat of the high temperature and high pressure cooling steam from the cooling compressor, so that the high temperature and high pressure refrigerant vapor is cooled and condensed into a high pressure normal temperature refrigerant liquid. It is worth mentioning that in the process of transforming refrigerant vapor into refrigerant liquid, the pressure of the condenser is constant and still at high pressure.
3.Throttle element (namely expansion valve)
The high-pressure and normal-temperature refrigerant liquid is directly sent to the low-temperature scale evaporator. According to the corresponding principle of saturation pressure and saturation temperature, the pressure of the refrigerant liquid is reduced, thereby reducing the temperature of the refrigerant liquid. The high-pressure and normal-temperature refrigerant liquid passes through the throttling element of the decompression device to obtain a low-temperature and low-pressure refrigerant, which is sent to the evaporator to absorb heat and evaporate. In daily life, capillary tubes are often used as throttling elements for refrigerators and air conditioners.
The evaporator is also a heat exchange device. The low-temperature and low-pressure refrigerant liquid evaporates (boils) into steam after being throttled, absorbs the heat of the material to be cooled, reduces the temperature of the material, and achieves the purpose of freezing food. In the air conditioner, the surrounding air is cooled to cool and dehumidify the air. The lower the evaporation temperature of the refrigerant in the evaporator, the lower the temperature of the cooling substance. In the refrigerator, the evaporation temperature of the general refrigerant is adjusted to -26°C to -20°C, and in the air conditioner, it is adjusted to 5°C to -8°C.
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DAYTONA BEACH, Fla. & RALEIGH, N.C.--(BUSINESS WIRE)--As NASCAR Weekly Series sanctioned events begin to return at select tracks across North America, NASCAR and Advance Auto Parts (NYSE: AAP), a leading automotive aftermarket parts provider, today announced a multiyear official partnership, designating Advance as the series entitlement sponsor. As part of the agreement, Advance also becomes the “Official Auto Parts Retailer of NASCAR.”
"It's great to have Advance join us in welcoming the return of NASCAR-sanctioned grassroots racing," said Ben Kennedy, vice president, racing development, NASCAR. "Advance’s commitment to our Weekly Series will develop some of the brightest NASCAR talent across North America. Advance has a long history in racing, and we’re thrilled to see its expanded presence from the grassroots all the way through our national series.”
The NASCAR Advance Auto Parts Weekly Series is one of the oldest series in NASCAR, where champions are crowned at NASCAR-sanctioned Home Tracks. The NASCAR Advance Auto Parts Weekly Series was paused in mid-March due to COVID-19 and recently returned with sanctioned events at select tracks beginning June 6.
The series is run at nearly 60 NASCAR-sanctioned Home Tracks throughout the United States and Canada. NASCAR Home Tracks are a group of local short tracks sanctioned by NASCAR.
“Drivers and race fans in North America have not been able to attend their local tracks due to COVID-19. We are excited to be partnering with NASCAR and the NASCAR Weekly Series to support tracks, drivers and fans as they resume live racing this year,” said Jason McDonell, Advance’s chief marketing officer. “We are committed to helping our customers advance in our stores, online and with this multiyear partnership with NASCAR. We are passionate about advancing local communities where we serve, and through this sponsorship we’ll be able to help grow racing at the grassroots level while supporting the next generation of champions.”
Race fans can catch select NASCAR Advance Auto Parts Weekly Series races live and on-demand via TrackPass on NBC Sports Gold, the new streaming service from NASCAR and NBC Sports. NASCAR Advance Auto Parts Weekly Series races are part of the NASCAR Roots package for $2.99/month or $19.99/annually. The full TrackPass package, which includes NASCAR Roots, IMSA and American Flat Track events is available for $4.99/month or $44.99/year. TrackPass on NBC Sports Gold will be available on desktop web browsers and via the NBC Sports app on iOS and Android phones and tablets, Apple TV (Gen 4), Roku, Amazon Fire TV, AndroidTV, Xfinity X1, Xfinity Flex and Chromecast devices connected via HDMI.
The National Association for Stock Car Auto Racing (NASCAR) is the sanctioning body for the No. 1 form of motorsports in the United States and owner of 16 of the nation’s major motorsports entertainment facilities. NASCAR consists of three national series (NASCAR Cup Series™, NASCAR Xfinity Series™, and NASCAR Gander RV & Outdoors Truck Series™), four regional series (ARCA Menards Series, ARCA Menards Series East & West and the NASCAR Whelen Modified Tour), one local grassroots series and three international series. The International Motor Sports Association™ (IMSA®) governs the IMSA WeatherTech SportsCar Championship™, the premier U.S. sports car series. NASCAR also owns Motor Racing Network, Racing Electronics, Americrown Service and ONE DAYTONA. Based in Daytona Beach, Florida, with offices in eight cities across North America, NASCAR sanctions more than visit www.NASCAR.com and www.IMSA.com, and follow NASCAR on Facebook, Twitter, Instagram, and Snapchat (‘NASCAR’).
About Advance Auto Parts
Advance Auto Parts, Inc., is a leading automotive aftermarket parts provider that serves both professional installer and do-it-yourself customers. As of April 18, 2020, Advance operated 4,843 stores and 168 Worldpac branches in the United States, Canada, Puerto Rico and the U.S. Virgin Islands. The Company also serves 1,258 independently owned Carquest branded stores across these locations in addition to Mexico, the Bahamas, Turks and Caicos and British Virgin Islands. Additional information about Advance, including employment opportunities, customer services and online shopping for parts, accessories, and other offerings can be found at www.AdvanceAutoParts.com.
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