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Recirculating Chiller-The Complete FAQ Guide by TopChiller.

What is a Recirculating Chiller?

A Recirculating Chiller is an encased and highly efficient cooling system. It is used in external applications to cool the equipment as rotary evaporators.

Recirculating Chiller provides a reliable source of cooling to remove electrical or mechanical heat generated in the application or produced by exothermic processes.

It offers a liquid coolant for cooling in clinical, industrial, or laboratory applications. Most of the Recirculating Chiller can work in the temperature range of 5 °C to 35 °C.

Energy saving recirculating chiller by TopChiller

What are the Features of Recirculating Chiller?

Many features make Recirculating Chiller distinctive in the row of Chillers. These features are enlisted below:

• Ultra-compact design
• Cooling capacity 160W to 95kW
• Thermoelectric and compressor-based
• Portable and unique operation
• Remote shutoff button
• Power-efficient
• Digital control panel
• Inculcated Low flow alarm
• Compact size, long working life, and simple operation
• High frequency and power
• Optimized process controlled system

Recirculating chiller digital control panel

What is the Working Principle of Recirculating Chiller?

The working principle of Recirculating Chiller is vapor absorption or vapor compression. It works on the principle of assimilating liquid coolant circulation in the pipes with high flow pressure as a means to speed up the removal of heat from the application.

The gas that is generated as a result of this circulation then moves toward the condenser where ambient water or air takes the heat of refrigerant and condenses it into a liquid.

What are the Main Components of Recirculating Chiller?

A Recirculating Chiller is a complex cooling system. It comprises the following main components:

Compressor

The most important component of Recirculating Chiller is the compressor. It is located between the evaporator and condenser.

Evaporator

The evaporator functions to accumulate extra heat from the building and move that to the refrigerants present in a Recirculating Chiller.

Condenser

The condenser is placed before the expansion valve and after the compressor.

Expansion Valve

The expansion valve is placed between the evaporator and condenser to perform its function effectively.

Power unit

It includes breakers, circuits, speed controllers, and starters.

Control

The control unit is usually organized in Recirculating Chiller.

Water box

This is used to direct flow as well as separate the entrance and exit.

Recirculating chiller major parts view

How does a Recirculating Chiller work?

A Recirculating Chiller works by using a vapor compression mechanical refrigerant cycle to operate a water system through a device called the evaporator.

The refrigerants then circulate through all the components of the chillers which include:

• Compressor
• Evaporator
• Condenser
• Expansion valve

After this, a thermodynamic process occurs in all of these components to remove unwanted heat from the application.

How to Calculate the Cooling Capacity of Recirculating Chiller?

Recirculating Chiller provides chilled water which is eventually used to provide an air-conditioned environment to the building and laboratory.

To calculate the cooling capacity you need to know the following few things:

• The volume flow rate of water into the evaporator.
• The inlet and outlet water temperature.
• The density of water at avg. temperature.
• The specific heat capacity of chilled water.

What does Recirculating Chiller Offer?

A Recirculating Chiller is such a complex cooling system that ranges vastly in dimensions and pattern. This chiller unit is present in all types either as a small or less compatible chiller for the applications of smaller scale or a large portable chiller for larger industry.

Recirculating Chiller functions to dehumidify and cool the building by removing unwanted heat out of the system.

Recirculating Chiller offers:

• The capacity of pumping is up to 15.5L/min.
• Controlling temperature ranges from –25 °C to 130 °C.
• Sealable reservoirs which allow open-loop and closed-loop use.

What is the Difference between Water Cooled and Air-Cooled Recirculating Chiller?

Recirculating Chiller either water-cooled or air-cooled operates to eradicate excess heat from the system and make the environment less heated.

• Water Cooled

Water Cooled Recirculating Chiller uses a humid air stream. In other words, it exhibits ambient air stream pus water spray. Normally they are more efficient.

• Air Cooled

An Air Cooled Recirculating Chiller uses a current of ambient air instead of water sprays. These chillers are cheaper than the above category because they do not need cooling towers and water pumps.

Which type of Water is used in Recirculating Chiller?

Recirculating Chiller, specifically water-cooled typically uses Recirculating condenser water that comes from the cooling tower to condense the refrigerants.

Water Cooled Recirculating Chiller contains a refrigerant that depends on the entering condenser water temperature or flow rate.

The type of water that is commonly used in most of the chillers is deionized.

What type of Refrigerants is used in Recirculating Chiller?

Process Recirculating Chiller contains a chemical compound for its appropriate function is refrigerants.

The refrigerants that are used in low medium-capacity chillers are:

• R-410A
• R-407C

Whereas, in large applications the following are the predominant refrigerants:

• R-134a
• R-123

In addition to this, HCFC-22 (R-22) has been the most famous refrigerant for residential heat pumps and air conditioning in the atmosphere.

Recirculating chiller refrigerants

What Causes the Recirculating Chiller to Freeze?

There might be multiple causes of freezing Recirculating Chiller. The most common among all is due to the lack of flow. This turns the freeze alarm on.

The decreased flow rate of refrigerant results in reduced refrigerant temperature in the evaporator often ending up in freezing of the whole chiller.

There might be a restriction in the piping system, or possibly the expansion valve was closed results in simply failure of a pump.

How do you size a Recirculating Chiller for your Application?

To size a Recirculating Chiller according to your application, you need to go through these steps:

• Calculate temperature differential.
• Determine BTU/hour.
• Evaluate tons of cooling capacity BTU/hour.
• Oversize a Recirculating Chiller by 20% ideal size in tons.
• You have the ideal size Recirculating Chiller of your need.

What is the Cooling Capacity of Recirculating Chiller?

Cooling capacity determines the ability of a cooling system to remove heat over time. Most of the time it is equivalent to heat supplied to the evaporator.

The cooling capacity of a Recirculating Chiller ranges from 200W to 95kW. This yield has required the handle the process heat burden. Such Recirculating Chillers are easy to use and safe to operate.

The cooling capacity of a Recirculating Chiller also depends on ambient air temperature or facility water.

How do you Calculate Chilled Water Consumption for a Recirculating Chiller?

The very easy and simple way to calculate the water consumption for a Recirculating Chiller is to multiply the units that are used by your current water rate.

Water is cooled down to 40 – 45 °F (4 – 7 °C) in the chilled water system. To evaluate the consumption of water, determine total heat removed from the system, evaporator flow rate of a Recirculating Chiller, and condenser flow rate.

How does Ambient Air Temperature Affect the Recirculating Chiller?

In the cooling capacity of a Recirculating Chiller, ambient air temperature plays an important role it. For a condenser of a Recirculating Chiller to repudiate the total heat load to ambient air or facility temperature.

The difference in temperature between the hot refrigerant gas and ambient gas must be sufficient.

As ambient air temperature elevates, the capability of a Recirculating Cooler to shift generated heat from the refrigerant to ambient air is decreased, resulting in higher condensing pressure.

What is the Accurate Temperature for a Recirculating Chiller?

A Recirculating Chiller has a great range of temperatures and it keeps on fluctuating depending upon the cooling capacity and size of a chiller.

Digital PID temperature controllers confirm that the Recirculating cooler/Recirculating Chiller hits the desired temperature precisely and quickly.

Some low-temperature Recirculating Chillers are also designed to maintain fluid temperature stability.

To maintain an appropriate and safe temperature for a Recirculating Chiller:

• Keep your Recirculating Chiller at 5 °C to 35 °C
• Thermoelectric control of ±0.3℃ precision

What is the Refrigerating Cycle of a Recirculating Chiller?

Recirculating Chiller that is compressor-based operates by utilizing the heat properties of a refrigerant to wipe out unwanted warmth from a piece of equipment and repudiate it to surrounding air.

Starting at the compressor, then the hot gas circulates through the condenser and evaporator. These are in actual heat exchangers that shift processed heat from one place to another.

The execution of heat exchangers is based on numerous factors, including the fluid temperature, rate of flow, construction material, and overall design of the heat exchanger.

Despite these factors, the hidden force behind the refrigerating cycle is a difference in incoming fluid temperature.

Refrigerating cycle of a recirculating chiller

What types of Refrigerants is Environment Friendly for a Recirculating Chiller?

Refrigerants do an excellent job at cooling air inside an HVAC system that is then divided throughout a building. In addition to it, refrigerants can do a number on the climate by ejecting pollutants and contributing to the depletion of the ozone layer.

The environmentally friendly refrigerants can be measured by their GWP global warming potential and ODP ozone depletion potential. Fortunately, there exist some eco-friendly refrigerants and others continue to discover them.

The most preferably environmentally friendly refrigerants are hydrofluorocarbons (HFC) and hydrofluoric-olefins (HFO).

HFCs are comprised of fluorinated hydrocarbons. HFCs do not affect the ozone layer directly.

What are the Outstanding Benefits of Recirculating Chiller for your Application?

Recirculating Chiller is a popular choice for temperature critical applications. Its                                   benefits include:

• Improved Productivity

The productivity of a recirculating chiller can be improved by decreasing the downtime of the chiller.

• Equipment Protection

Recirculating Chiller is such a protective device that it protects your worthy applications. It provides solid protection 24 hours a day and 7 days a week to your process equipment.

• Optimized Process Control and Operating Limits.

The rising level of modern industry and investment have implied the highest precision with almost zero or no downtime.

It is essential for an economically viable process

• Reduced Operating and Maintenance issues
• Save water and Related costs
• Designed for Industrial Processes
• Eliminate water monitoring and associated costs

Eco-friendly small recirculating chiller

How do you clean your Recirculating Chiller?

Proper cleaning is necessary for any machine that runs for several hours continuously. Its timely cleaning ensures its ability to maintain temperature.

To clean your Recirculating Chiller, you first need to drain all the water from the coolant then, replace the coolant with high-quality clean and clear water. Run the Recirculating Chiller more than 10 times and drain the coolant again.

For cleaning purposes, you can either use brushes or a fin comb. These accessories help in the complete cleaning of Recirculating Chiller.

How can you Increase the Efficiency of Recirculating Chiller?

Recirculating Chiller is a complex cooling system. It works with more efficiency when maintained and cleaned regularly.

There are three very productive ways to increase the efficiency of a Recirculating Chiller:

• Consider different speed retrofits. Most components of a Recirculating Chiller within a chilled water system will benefit from variable speed drives
• Running more than one parallel device optimize savings
• By increasing the supply temperature to the chiller

What are the Tactics to Operate your Recirculating Chiller?

The tips and tactics that are taken under consideration while operating a Recirculating Chiller in industry or laboratory are as given:

• Make sure that environment is the right temperature and humidity.
• Expel or top of the coolant from the pipes.
• Wash the condenser fins.
• Grease the pump.
• Wash or replace the strainer.
• Clean or replace the filter.

A chiller like Recirculating Chiller is a robust cooling system that is ideal for demanding lab applications and requires continuous use.

Recirculating chiller cleaning

How much power does a Recirculating Chiller Consume?

Recirculating Chiller is used for numerous cooling applications. Like many other appliances that use electrical power, Recirculating Chiller also generates its heat compressor, fan motors, and pump.

In an Air Cooled Recirculating Chiller all the electrical energy is converted into heat, whereas in Water Chilled Recirculating Chiller, the produced heat is drawn out from the condenser by using a source of facility water.

The leftover heat generated by the Recirculating Chiller is liberated into the open space but is subsequently less heat as compared to the air-cooled.

How can you Optimize your Recirculating Chiller?

A Recirculating Chiller typically functions to provide a steady flow of temperature-controlled fluid to an application that results in removing all the extra heat out of the system.

To optimize a Recirculating Chiller, you must find out one or more than one distinctive requirement such as controller option, site condition, or required accessories.

A complete application review is recommended, to optimize a Recirculating Chiller.

When heat is needed to be wiped out of the system some applications such as reaction vessels may require both cooling and heating, to maintain or lower the application temperature.

What are the Protection Options that a Recirculating Chiller Offers?

The options for protecting a Recirculating Chiller are mentioned below:

• External flow Valve

An external valve is used to control the coolant flow rate to your application. This globe valve is adjusted manually.

• External Pressure Relief Valve

This is another additional valve that permits to continue to maintain or run pressure and temperature if the flow of the equipment is interrupted temporarily.

• Anti-Siphon System

In the Anti-siphon system convenience and ultra protection, both are being provided by the valves. Internal check and solenoid valves are two integral components of this system.

• Air Filter

For polluted and dusty environments, air filters are usually suggested. These air filters prevent the Recirculating Chiller from the dust particles that if air filters are not present would ruin the proper functioning of the chiller.

• Remote start

This option allows the external circuit of Recirculating Chiller to shut off/on automatically via dry contact.

Recirculating chiller air filter

What is the Impact of Poor Water Quality on Recirculating Chiller?

Sustaining consistent water quality throughout the system is very crucial. The process fluid and water quality used in the Recirculating Chiller also impacts the performance of the Recirculating Chiller.

The Cooling capacity for Recirculating Chiller is dependent directly on the water which is used as a process fluid, so utilizing a fluid other than water might result in comparatively low cooling capacity.

Maintaining consistent water quality throughout the running chiller is essential for its proper function. When the consistency of water quality and its treatment is ignored, then this poor water can ruin the cooling system of the Recirculating Chiller.

How Often should a Recirculating Chiller be Serviced?

Running a machine continuously with very little or no pause can damage its processing parts. The components of Recirculating Chiller get corrosion and fail to perform their function efficiently.

In addition to, monthly, quarterly, and yearly service, a Recirculating Chiller can also get a quick and easy weekly inspection for its proper functioning.

The preventive maintenance period for Recirculating Chiller depends on the following factors including:

• The number of daily hours of operation and type of pump used.
• Environmental conditions and location of the Recirculating Chiller.
• The coolant used in the system.

How can you prevent Corrosion in Recirculating Chiller?

Corrosion and rust can damage the parts of a Recirculating Chiller and eventually destructs the whole chiller.

Customized water treatment and proper chemical and coolant inspection can avoid any corrosion and microbiological growth.

The corrosion can be prevented or minimized by controlling pH and using an inhibitor that is corrosion-specific. The corrosion inhibitors stick to the metal surface of the Recirculating Chiller component to passivate them and prevent corrosion.

The other very significant fact is to avoid stagnant zone inside the cooling system to prevent corrosion. For sake of this purpose, an essential step is to maintain good quality water in the pipes.

What is the Noise Level of Recirculating Chiller?

Thermo flex Recirculating Chiller is an advanced low noise producing chiller. It promotes a safe and reduced stress environment.

The purpose to improve lab productivity is to make it simpler for researchers to do their job or duty and stay focused on science.

In the lab, where the surrounding is relatively quiet, this Recirculating Chiller reduces the emitted sound pressure, minimizing worker distraction, and creating a safer and more ergonomic work environment.

Unlike other reduced-noise chillers, the Thermo Flex Recirculating Chiller unit is specifically designed to remain quiet under challenging conditions. Its noise level is less than 58dBA.

For recreational Recirculating Chiller Noise alarms are installed to reduce the sound to a greater extent.

Recirculating chiller anti-vibration and noise pads

How Long Does a Recirculating Chiller Last?

The life expectancy of a Recirculating Chiller depends upon the maintenance and regulation of the components of the cooling system. If the components are being checked regularly and serviced with a time period then, the life expectancy of a chiller can increase.

The complex cooling system of a Recirculating Chiller eradicates the excess heat of the running equipment out of the building or labs.

The heat generated by the device being cooled is disintegrated from the atmosphere. Recirculating Water Chiller with the temperature control of PID has a guarantee of 3 years or in some cases more than three.

How much do Recirculating Chiller Costs?

A Recirculating Chiller is customized equipment that can be customized as per the demand of the operator. Extra features can be installed to enhance its performance in the laboratory.

Recirculating Chiller manufacturers from all over the world are selling their products at different rates. The current market rate of this Recirculating Chiller is around $19000 to $30000.

The price might be low or high if you installed or omit some of its features.

Low cost recirculating chiller by TopChiller