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What is condensing temperature for a head pressure of 175 psig for an R-12 system?
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∙ 9y ago
75 or 80
Wiki User
∙ 9y ago
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What does the head pressure do if the suction pressure rise?
the head pressure will rise
I will check your temperature?
My head hurts so much. I think I am going to get the flu. Well, I will check your temperature. Where are you going? Where will you go?
What is stagnation pressure?
Static pressure is the pressure exerted by fluid in all directions, when it is in rest. Stagnation pressure is the sum of static and dynamic pressure of fluid in motion. Dynamic head is given by (velocity)^2/2*g.
What does a high millibar measurement in a high pressure area mean?
cause people know this off the top of their head. no.
Temperature gauge working principle?
thermometers filled with either a liquid such as mercury or an evaporating fluid as used in refrigreators. in both cases the inside of the sensor head and the connecting tube are completely full. any rise in temperature produces expansion or evaporation of the liquid so the sensor becomes pressurised. the pressure is related to the temperature and it may be indicated on a simple pressure gauge. another well known principle that if two metals are rigidly joined together as a two layer and heated, the difference in the expansion rate causes the strip to bend. the strip is twisted into a long thin coil inside a tube. one end is fixed at the bottom of the tube and the other turns and move a pointer on a dial.
The control that stops the condensing unit if the head pressure climbs too high is classifies as a?
safety control
What is the low side and high side pressure for r410a?
Technicians with R-22 experience will need to become familiar with working with high and low side pressures that are much higher when using R-410A. A typical R-22 system operating normally with a head pressure of 260 psig at a 120-degree condensing temperature and a low side pressure of 76 psig at a 45-degree evaporator saturation temperature will find the equivalent pressures in a R-410A system to be much higher.A normally operating R-410A system with the same condensing temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig.Although refrigerant 410A is a near-azeotrope and has a slight temperature glide, there is no need to correct for refrigerant dew point and bubble point differences. Superheat and sub cooling calculations can be calculated the same way we have always done with R-22 refrigerant. The only difference will be the higher pressure-temperature relationship when reading the temperature-pressure chart. The temperature glide for R-410A is only .3 degrees Fahrenheit and can be ignored and fractionation is not a concern.
Will ac consume less power during winter?
Air conditioning usually consumes less power in winter, but mainly because it isn't needed as much. You should expect the air moving parts of the machine to have litttle interest in the outdoor air temperature. You might expect that the refrigerant compressor would consume less power in the winter because the the condensing temperature and head pressure would be lower. In practice, the the A/C must limit the system condensing temperature and maintain a higher head pressure to avoid the compressor oil being pumped out and/or liquid refrigerant being returned instead of vapor and damaging the compressor. Head pressure controls often begin to maintain condensing pressure and temperature at roughly 80°F, below which the condenser fans are either slowed or cycled on and off. Larger systems will employ additional safeguards. Any electrical savings from the condenser fan running slower or less often are made up for by a compressor heater that runs in the compressor off cycle to keep refrigerant from condensing in a cold compresssor shell and filling it with liquid refrigerant that would result in damage when it started. Simple systems lacking head pressure controls risk shortened operating life below 60°F and may suffer compressor damage at lower temperatures. So... if you are looking for efficiency in data center cooling in a cold area, the A/C itself won't help. A more complex system with a chilled water loop may be configured to use either refrigeration or simple heat exchange. Air to Air heat exchangers can also be employed.
What is the relationship between fluid head and pressure in a closed loop system?
Head = (Pressure * specific gravity)/2.31 Head in ft Pressure in pound per in^2
What two things increase as you head to the center of the earth?
pressure and temperature
What is definition of high head pressure in a air conditioner?
High head pressure is due to the lack of heat removal during the condensing process of the refrigerant cycle. The outdoor condenser is there to transfer the heat out and condense the refirgerant into a liquid. When ever the condenser is dirty or the fan motor is not working right the result is an increase in temp. and since pressure and temp are directly related the refirgerant pressure is increased thus the term high head
Why is your Punto 1.2 T-reg over heating Not head gasket or thermostat Also builds up excessive pressure in system and pushes out coolant?
your piping for the coolant system or radiator could be leaking and causing a loss of coolant making the temperature rise. Have you had it pressure tested?
Is there an upper limit to High Head Pressure?
This depends on the refrigerant and the condensing medium, but essentially:R-22: do not consistently exceed 275 psig running pressure;R-410A: do not consistently exceed 445 psig running pressure.The HVAC Veteran
What happens to the temperature of the discharge line when the head pressure is increased?
the line go up
What does static head mean?
"Head" is a term given to the weight and resulting pressure of a column of liquid above a given point in the system. Static head means that the head pressure is measured with no liquid actually flowing. Dynamic head would be the pressure of the liquid while it is actually flowing.
Why does the head pressure rise when the evaporator has an excess load?
the system capacity is max out
What is formula for pressure at known water flow and pipe diameter?
There isn't one. Pressure in a piping system will be determined by the pump, or head of water if it is a gravity feed system.
