rise
inside evaporator case
The evaporator superheat for this system would be 18°F. This is calculated by subtracting the evaporator outlet temperature of 58°F from the saturation temperature of the refrigerant at 76 psig, which is 76°F. The difference between the two temperatures gives the evaporator superheat.
During the defrost cycle of a forced draft low temperature evaporator, the evaporator fan would typically be turned off to prevent warm air from interfering with the defrost process and to help the coil achieve proper defrosting temperatures.
To find the evaporator superheat, you need the saturation temperature of R22 at the evaporator pressure of 76 psi (which corresponds to roughly 40°F), and then subtract this from the measured outlet temperature of 58°F. Therefore, the evaporator superheat in this scenario would be approximately 18°F.
behind glovebox in side of evaporator it has a 2 pin connector.
8.2
When the air temperature in a domestic freezer is 0°F, the plate-type evaporator temperature may be as low as -10°F to -20°F. This temperature drop is necessary for effective heat absorption from the food and air inside the freezer, ensuring that items remain frozen. The exact evaporator temperature can vary based on the design and efficiency of the freezer.
On a 2002 Honda Civic EX, the evaporator temperature sensor is typically located within the HVAC (heating, ventilation, and air conditioning) assembly, specifically near the evaporator core. It is often situated inside the dashboard, requiring some disassembly to access it. This sensor monitors the temperature of the evaporator to help optimize the air conditioning system's performance.
The expected temperature drop through a direct expansion evaporator coil is typically around 15 to 20 degrees Fahrenheit. This drop in temperature occurs as the refrigerant evaporates and absorbs heat from the air passing over the coil. It is important for efficient cooling and dehumidification in an HVAC system.
gas leakage
A thermostatic expansion valve (TXV) controls refrigerant flow to the evaporator based on the temperature and pressure of the refrigerant leaving the evaporator. It senses the superheat level, which is the temperature of the refrigerant gas above its saturation temperature. By adjusting the flow of refrigerant accordingly, the TXV ensures optimal evaporator performance, preventing both flooding and underfeeding of refrigerant, thus enhancing system efficiency and preventing compressor damage.