The most effective closed circuit cooling tower / Evaporative Closed-circuit cooling towers

The advantage of closed circuit

It is suitable for all kinds of heating element equipment that need cooling, such as: central air-conditioning unit, air compressor, induction coil of industrial frequency and intermediate frequency furnace, intermediate frequency power supply,  power supply, welding machine, laser equipment and high frequency equipment, heat treatment and quenching Circulating cooling of medium, mold, generator set, large hydraulic station, etc.

With a closed-loop system, there are significant installation savings attributed to the reduced pumping HP required, the elimination of an intermediate plate-and-frame heat exchanger, and the elimination of expensive valves and additional pipework. This is coupled with the lifetime  operational savings including reduced water treatment/chemicals, reduced water consumption, and reduced maintenance. Comparing just an open tower to a closed circuit cooler in terms of price does not tell the whole story, when considering the up-front additional installation costs and operational costs of an open-loop system

Because the clean system fluid provided by a closed loop design reduces maintenance and wear to all connected components, equipment lifecycle is lengthened. Reducing maintenance also results in less downtime, which is particularly important for data centers and critical process cooling applications.

Compared to open-loop cooling towers, fluid coolers provide more flexibility in terms of where heat rejection equipment is installed. Closed-loop systems also do not require hydraulic balancing or equalization. Because of this, fluid coolers can be installed at or below the level of the connected system piping. Conversely, installing a cooling tower below grade or below the pump could result in the tower flooding when the unit shuts down.

Closed-loop equipment also provides an advantage for cooling systems operating in sub-freezing outdoor temperatures. Some types of closed loop equipment may still require freeze protection of some sort, but all open loop cooling towers must be equipped with basin heaters, a drain-back design or a recirculation system for idle periods in freezing conditions.

Closed circuit coolers can also provide completely dry sensible heat rejection when outside ambient conditions are favorable. This dry capacity is an added benefit which can greatly reduce the overall water consumption on a project. Fluid coolers can be sized for full design or partial load based on a dry bulb switchover temperature. This means that the recirculating spray pump can be deenergized when the heat load can be fully satisfied by just the fluid cooler fans. While this operational mode greatly reduces water consumption, energy is also saved since the recirculating pump is off.

Principle of Operation:

The cooled dry air enters through the louvers on each sides of the tower in the bottom, and drawn upwards and over the coils by the force from the axial fan which installed on the top, agitating the falling water (came from the water distribution system) and increasing the transfer efficiency of heat in a state of hot wet air discharged out of the tower into the atmosphere. During this working process, a small amount of the re-circulating water evaporates due to latent heat transfer through the tube and walls of the coils, removing heat from the system. In this mode of operation, due to the evaporative performance lower the leaving water temperatures and the fan energy been saved.

Product description:

The utility model discloses a cooling tower, which comprises a water dispersion pan, a top cooling layer, a cooling tower shell, a water collection tank, a cooling coil, a water pump and a spray pipe. The dispersion water pan is arranged on the top of the cooling tower shell for spraying Below the water outlet of the pipeline, the pre-cooling layer is arranged below the water tray, the water collection tank is arranged at the bottom of the cooling tower shell, the cooling coil is arranged at the bottom of the closed-circuit cooling tower shell, and the cooling coil is arranged Between the pre-cooling layer in the cooling tower shell and the water collection tank, the water pump is arranged on the spray pipe. By providing a pre-cooling layer in the cooling tower, the cooling water passes through the further water distribution of the pre-cooling layer, so that the closed-circuit cooling water is evenly sprayed on the cooling coil, thereby improving the cooling efficiency of the closed-circuit cooling tower  and saving energy.

Closed cooling tower

The utility model relates to a closed loop cooling tower, which comprises a casing, a fan, a coil and a sprayer. The utility model is characterized in that: one side of the casing is provided with an air inlet, the fan is installed at the air inlet, and the casing The top is provided with an exhaust window; the coil is set in the shell, the hot fluid inlet of the coil is on the top, and the cold fluid outlet is on the bottom; a sprayer is set directly above the coil, and at the bottom of the shell just below the coil A water receiving tank is provided, and the lower side of the water receiving tank is provided with a drain port, and the drain port is connected with the water inlet of the sprayer through a spray pump and a circulation pipeline. The utility model has a simple structure and a reasonable design. By adding fillers in the shell, the cooling water residence time is prolonged, the heat exchange area is increased, the heat exchange amount is increased, and the cooling effect is improved.

Industrial closed circuit cooling tower structure and key components introduction:

ICE standard counter-flow closed circuit cooling towers use the latest highly corrosion-resistant coated steel sheet which consist zinc as the main substrate, in combination with Al, Mg and a trace amount of silicon. The service life is 3~6 times longer comparing with normal aluminized zinc steel sheet and the heat-resisting and thermal resistance feature is also excellent. 

Cooling coil for cooler

A new type of cooling coil for the cooler is used, including a bracket for erecting copper pipes, a bracket for copper pipes, copper pipes, connecting elbows and branching water pipes, and a plurality of said copper pipes form a copper tube bundle, The copper tube bundle is fixed on the bracket, and the copper tube bundles are connected by connecting copper elbows, and the water inlet end of the copper tube is lower than the water outlet end. Branch water pipes are arranged on the copper tube bundles at the inlet and outlet of the cooler. By setting the water inlet of the copper pipe higher than the water outlet, the water in the cooling coil can be discharged in time, so as to avoid the cooling coil from being damaged by freezing under low temperature conditions.

Double cooling closed cooling system

The utility model relates to a double cooling type closed cooling system. The exhaust duct is equipped with a fan room, the fan is installed in the fan room, the air inlet of the fan is connected to the outside of the exhaust duct, and the top of the exhaust duct is provided with an exhaust window; the coil system is set in the exhaust duct, and the The dry fin cooling coil is directly below, and the evaporative coil in the coil system is directly below the sprinkler; the bottom of the exhaust pipe is provided with a water receiving tank, and the lower side of the water receiving tank is provided with a drainage port, which is sprayed The pump and the circulation pipeline are connected with the water inlet of the sprinkler. The utility model adopts a dry fin cooling coil to dissipate the hot fluid for the first time, and then enters the evaporative coil to cool by spraying water and dry cold air, thereby improving the cooling efficiency; by adding filler in the exhaust cylinder, the extension The residence time of cooling water is increased, and the cooling effect is improved.

Scope of application

Closed cooling towers are suitable for all kinds of heating elements that need cooling, such as: central air conditioning units, air compressors, induction coils of intermediate frequency furnaces, intermediate frequency power supplies, IGBT power supplies, resistance welding machines, laser equipment and high frequency equipment Circulating cooling of heat treatment quenching medium, mold, generator set, large hydraulic station, etc.

Expert Recommend Energy -saving closed circuit cooling towers
Professional Closed -loop  Cooling Tower
Structure closed circuit cooling tower

Post time: Apr-19-2021