What is the cause of high condensing pressure in water cooled condenser?
One common cause of high discharge pressure is the cooling medium (air or water) flowing across the condenser: either there is not enough or the temperature of the cooling medium is too high. This is normally easy to identify with a simple visual inspection of the condenser.
How do you clean a water cooled condenser?
Mix warm water and acid according to container instructions (usually 10 parts water to one part acid). Circulate acid mixture through condenser for 15-30 minutes. Remember acid is corrosive so do not circulate longer than 1 hour.
What effect would a low water flow have on a water cooled condenser?
We note that as the condenser water flow rate decreases: The chiller leaving condenser water temperature and chiller power rise. The condenser water pump power drops. If the same cooling tower is used, its approach temperature decreases.
What should condenser pressure be?
As a typical condenser pressure might be around 0.1 bar,a, and a typical ejector compression ratio may be 3:1 to 4:1, it generally takes two to three stages of compression to exhaust to atmospheric pressure, about 1 bar,a.
What is the purpose of a water-cooled condenser?
A water-cooled condenser is a heat exchanger that removes heat from refrigerant vapor and transfers it to the water running through it. Having the refrigerant vapor condensed on the outside of a tube does this.
What happens if condenser water temperature is too low?
If the entering water temperature drops too low, the condenser head pressure will not be high enough to supply refrigerant through the expansion valve. Under less than full heat load conditions, the temperature will be less than design.
Does a condenser reduce pressure?
Temperature profile inside the condenser In a similar way to evaporation, the only pressure difference between the entrance and the exit of the heat exchanger is the pressure drop. Because the flow velocity in a condenser decreases, the induced pressure drop is much lower than in an evaporator.
What is the purpose of using a condenser?
The function of the condenser in a refrigeration system is to transfer heat from the refrigerant to another medium, such as air and/or water. By rejecting heat, the gaseous refrigerant condenses to liquid inside the condenser.
What should the temperature be for a water cooled condenser?
The cooling tower should provide water that is about 7 degrees warmer than the outdoor wet bulb, so a 78 degree wet bulb should yield 85 degree water to the condenser. This is called the cooling tower ‘approach temperature.’
Can a water tower be used to cool a condenser?
Using a cooling tower to furnish the water that contacts the outside tube can further cool the condenser. Also, a water tower can be used to cool the water sent through the inside tube for cooling purposes. This type of condenser is usable where refrigeration or air-conditioning requirements are 1/3 ton to 3 ton.
What happens when a water cooled condenser is only working at half load?
When the water-cooled condenser is only working at half load, there will be a 5 degree rise in condenser water temperature. “There is a relationship between the leaving condenser water and the refrigerant condensing temperature of about 10 degrees.
How do you remove condensation from water cooled system?
It can only be removed by purging to atmosphere. Purging from any point on the low pressure or intermediate pressure sections of a system WILL NOT remove non condensable gases. Stop the compressor and leave the water running. This will allow any refrigerant to condense.