Fengxiang constant pressure water replenishment and degassing unit

Product release date: July 31, 2016 13:44:39 Click:

product overview
The Fengxiang DTQ series fully automatic constant pressure expansion water replenishment and deaeration equipment consists of a constant pressure water replenishment pump group, an expansion and deaeration tank, and a fully automatic control cabinet. It is the best solution to solve the air problem in a closed cycle air conditioning system. It comprehensively solves the problems of constant pressure, thermal expansion, water replenishment, and deaeration in a closed air conditioning circulating water system. Its effect is equivalent to the combination of a traditional constant pressure expansion water replenishment equipment and a deaeration equipment. It is the new generation of internationally advanced constant pressure expansion water replenishment and deaeration equipment launched by Shanghai Fengxiang.
characteristic
The traditional constant pressure expansion water replenishment equipment eliminates the high-level expansion water tank, but there are still the following problems:
The expansion tank is a pressure vessel with high production requirements
The effective volume of the expansion tank is limited by the absolute pressure ratio of the system, generally only about 20-40% of the total volume of the expansion tank
Without degassing function, mechanical air separators must be installed at each end of the pipeline, but it cannot eliminate dissolved gases in water, which can cause a series of problems such as gas resistance, noise, wear, corrosion, cavitation, and reduced heat transfer efficiency.
useDBTThe series of fully automatic constant pressure water replenishment and degassing equipment gives your system the following advantages:
The expansion tank also serves as an atmospheric pressure degassing tank, with an effective volume of up to the total volume90%, reducing the occupied space
Actively eliminate dissolved gases in water, no longer requiring dispersed mechanical air separators
Not only does it eliminate gases in the circulating water, but it also eliminates gases in the supplementary water
Eliminate system air resistance, improve equipment heat transfer efficiency, and save energy
Eliminate noise, protect equipment and pipelines from wear and corrosion
● Protect circulating pumps and heat exchangers from damage caused by cavitation
The degassing cycle can be set arbitrarily, and the system's water replenishment amount can be set arbitrarily
● Achieve fully automatic unmanned operation, enabling remote monitoring and communication
Equipment pipelines and valves are used304Made of stainless steel or brass, with a long service life

Working principle
Constant pressure/water replenishment:Monitor the pressure of the circulation system through the control system and drive the water replenishment and deaeration pump to keep the pressure constant within the set range; When no degassing is required, close the solenoid valve to maintain the pressure of the circulation system; When the control system detects that the pressure of the circulation system is lower than the set water replenishment value, the water replenishment solenoid valve is opened for water replenishment; The supplementary water enters the atmospheric expansion degassing tank for pressure reduction and degassing, and then enters the circulation system. The water replenishment pump here also serves as a degassing pump and plays a role in constant pressure control.

Absorption of thermal expansion water (safety): When the circulation system expands in volume due to temperature rise, the water in the system enters the atmospheric expansion degassing tank through the expansion valve; When the pressure of the circulation system exceeds the safe set value, the safety valve or solenoid valve will automatically open to release water and reduce pressure. Due to the limited diameter of safety valves or solenoid valves, pressure sensitive systems should be equipped with additional safety valves or pressure relief valves with sufficient pressure relief capacity to ensure system safety.
Degassing: High pressure circulating water enters the atmospheric expansion deaeration tank through an expansion valve for pressure reduction. The gas and water are separated, and the precipitated gas is discharged into the atmosphere through an exhaust valve. The deaerated water is then pumped into the circulation system.
The degassing working mode can be set as follows:
Continuous degassing: During the initial operation of the system, in order to quickly eliminate a large amount of gas, continuous degassing can be chosen.
Intermittent degassing: After the system has been running for a period of time, in order to save energy, degassing can be carried out according to the set cycle.