Autool LM110, Руководство пользователя

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Superheat: evaporation outlet temperature- evaporation temperature.
The lower subcooling can make the refrigeration capacity of the system better.
Adding subcooling loop and economizer in the refrigeration system is to increase the
subcooling for refrigerant increasing.
The degree of expansion of the expansion valve (refrigerant charge) affects the
degree of super- heat. The greater degree of superheat, the smaller the opening of
the expansion valve can be determined( the refrigerant charge is fewer).
Sensible heat and latent heat
The amount of heat required to raise the water temperature from 0 degrees to 100
degrees is sensible heat, the water is heated to 100 degrees, and the hot water
becomes water vapor, but the temperature is still 100 degrees. The heat required for
this process is called latent heat.
Gauge pressure and absolute pressure
Gauge pressure: Refers to the pipeline pressure, or the pressure measured by
pressure gauges, vacuum gauges, U-shaped tubes, etc., also known as relative
pressure. The “table pressure” starts with atmospheric pressure and the symbol is
Pg.
Absolute pressure: The pressure directly acting on the surface of a container or
object is called “absolute pressure”, the absolute pressure value is absolute vacuum
as a starting point, the symbol is PABS (ABS is a subscript) and the absolute
pressure is atmospheric pr gauge pressure.
At atmospheric pressure, the gauge pressure is 0 and the absolute pressure is 1.013
bar.
Dry Bulb Temperature Wet Bulb Temperature Black Ball Temperature
Dry bulb temperature: the temperature measured by ordinary thermometers.
Wet bulb temperature: a wet cloth is wrapped around the thermometer, and the
temperature indicates a drop due to the evaporation of water. The temperature at this
time is called the wet-bulb temperature.
The device, which has both the dry ball thermometer and the wet bulb thermometer,
is called the dry humidimeter, which can be used to measure the relative humidity in
the atmosphere.
Black ball temperature: also called actual temperature, it indicates the actual sensory
temperature expressed by temperature when a person or an object is combined with
radiant heat and convective heat in a radiant heat environment.
The black ball temperature measured is generally higher than the ambient
temperature, which is the air temperature.
Relative Humidity and Absolute Humidity
Absolute humidity: the mass of water vapor in a unit volume of air is called the
"absolute humidity" of air. It is a representation of the physical quantity of
atmospheric dryness and humidity. It is usually expressed in grams of water vapor
contained in 1 cubic meter of air.
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