ThermoGym - Thermal exchange solutions

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Use of Liquid Heat exchanger in Electronics Devices

Heat exchangers are a device used to transfer heat from hot medium to the cold medium. These mediums can be liquid to liquid or liquid to air. It is not necessary that both the liquid should be in contact with each other, a solid wall is used to separate them. There are many components in electronic devices that generate a lot of heat. It is necessary to maintain the temperature of the instruments, so they can work continuously, without any breakdown. So, excess heat generated by the components must be moved out of the instrument. Heat Exchangers are used to solving this problem.

The internet of things (IoT) is gaining popularity and the need for integrating computing devices into applications has increased. As a result power consumption is increased in such devices. Since liquid cooling systems are compact and can easily fit into applications, their use as a heat exchanger is increased. The heat transfer rate of liquid is much higher than that of air. So liquid cooling systems prove efficient compared to air cooling systems.

Design of Heat Exchanger

The design of the heat exchanger depends upon the application. Some heat exchangers use pipes while some heat exchangers use plates. To increase the heat transfer rate fins are attached to the pipes. In plate heat exchangers, plates are attached to the pipe. Liquid or water moves through the pipe and absorbs the heat from the pipe.  Oil, coolants, or other fluids are widely used in the liquid heat exchanger.

Liquid Cold Plates

Liquid cold plates are considered an efficient option for cooling electronics devices. Liquid cold plates transfer heat from the hot surfaces of the electronics components to the liquid. This liquid further flows into a heat exchanger and moves heat into the surrounding air or into another liquid. Liquid cold plates are compact in design and can easily fit into electronic devices. They are cost-effective solutions also. This is the reason why liquid cold plates are used widely in electronics devices. If you want to transfer high heat load from the electronics devices, customized liquid cold plates can be helpful. Dimension, cost, and performance are the important factors taken into consideration for designing liquid cold plates.

Liquid Cooling Loops

Liquid cooling loops are a combination of a tube and a liquid cold plate. A liquid cold plate is attached to the tube and the tube is supplied with the liquid. With the help of a pump, this liquid is circulated in the attached pipe. Circulating liquid is cooled either with ambient air and again cooled liquid is circulated to the heat-generating component to absorb the heat.

Liquids used in the cooling systems

Once you have decided that liquid cooling systems are the best for your application, the next step is to decide which liquid should be used in the liquid cooling system. There are many types of liquid used in the cooling systems which include water, deionized water, dielectric fluid, and ethylene glycol.

There are many factors that decide which liquid should be used. These include the compatibility of the liquid with the surface of the cooling device. The liquid must be compatible with the material used in the cooling plate or the pipes. Other important factors are the freezing point, heat transfer rate, corrosiveness, and toxicity of the liquid.

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Tips to maintain the small-scale heat exchangers

The heat exchanger is a system meant for the transfer of heat between two or more fluids. It has a two- dimensional use, cooling as well as heating. The fluid gets separated by a solid barrier to prevent mixing up in case of coming in direct contact with each other. It is a good alternative replacement for expensive furnaces and is durable too with regards to its life expectancy.

Small-scale heat exchangers are used in industries to recover and reuse heat. It leads to cost-cutting by replacing external sources of heat which are quite expensive. These heat exchangers are highly efficient and come in a variety of forms out of which water heat exchanger has earned its place due to its distinct benefits.

Some of the various tips to maintain the small-scale heat exchangers are stated below:

Application and usage of heat exchangers play a vital role in the depreciation of the heat exchangers. Hence, there are certain tips to be followed to maintain their efficiency.

Rinsing:

Rinsing could be done with the help of a bearable high flow of water flusher to remove the debris which gets accumulated owing to the residual from day to day working. Using water instead of extremely toxic chemicals and soaps lowers the need for specialized clean-up. This method will also assist to reduce maintenance expenses by eliminating the discharge of dangerous substances.

Acid cleaning:

Acid cleaning is very much important as in a lot of cases. This fouling reduces the fluid velocity therefore, acid cleaning helps in the removal of fouls deeply and keeps the heat exchanger fit. It has been proved to be the best and the most preferred hack to be performed when cleaning the heat exchangers.

PHE manual Cleaning:

You must obey the producers’ directions while cleaning yourself. It is preferable to wash plates without detaching them from the framing structure, thus when placing a PHE, see if there is enough room to allow for hand cleaning and maintenance. It is essential to use a cleaning chemical to remove any collected filth and dust, accompanied by a gentle rinse with pressured water and a delicate brush with furry bristles.

Time to time removal of sediments:

When the processing cycle is on, heat releases some particles from the fluid which gets settled down and rest on the heat transmission surfaces forming sediments. Sediments such as oxides, silt should be removed frequently to avoid rusting and corrosion.

Oiling of the parts of the exchanger:

It is very much essential to maintain the heat exchangers that are used in laser devices, as the efficiency of the devices depends on the heat exchangers. Therefore, Good lubricating agents and oils should be used to maintain the working efficiency of the heat exchanger.

Online Cleaning

This approach of reducing optimization and genetic fouling will not call for the heat exchanger to be turned off or the unit to be closed. When online cleaning is utilized alone or in combination with harsh chemicals, it will avert a decline in the heat transfer, preserve the tube’s purity element and it will also extend tube longevity, and improves the heat exchanger performance.

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What you should know about Tube fin heat exchangers

In simple words, heat exchanger is a device used to transfer heat from one fluid to other. Usually these liquids are separated by a solid partition wall so they don’t get mixed. Many applications need to run at certain temperature and to maintain desired temperature, heat exchangers play crucial role. Depending on the requirement, heat exchangers can be used for both the purposes, heating and cooling. Simple example of heat exchanger is use of coolant in car engine.

There are many types of heat exchangers and they are available in many sizes. Big heat exchangers are used in petroleum refineries, power generating plants and chemical industries, whereas small heat exchangers are used in electronics devices and other small devices like laser printers. Small sized heat exchangers are widely used in electronics because they easily fit inside electronic devices.

There are different types of heat exchangers, which include tube fin heat exchangers, Plate heat exchanger, Heat Sink / Pipe etc.

Tube Fin Heat Exchanger

Tube fin heat exchangers use tubes with fins on their outer surface area. Fluids move through the tube coils. Fins are used to increase the surface area of the tube and helps transfer heat faster into the surrounding air. Available surface area is the main factor which decides how efficiently the heat exchanger would work.

There are a number of factors that needs to be taken into account while manufacturing tube fin heat exchangers. The designs would also differ based the electronic device it will be used in. The thickness of the tubes, fin patterns and pipe connections will vary.

Different electronic devices need different types of tube fin heat exchangers. Even the metals used for manufacturing can differ based on the clients’ requirements. Cooper, stainless steel, aluminum, cupronickel and nickel are few of the metals that are extensively used for making tube fin heat exchangers.

Uses of Tube Fin Heat Exchanger

Tube fin heat exchangers are widely used in

• All types of laser application including medical, dental, aesthetic lasers • Deionized Water Applications • Fuel Cell Applications • Hot Temperature Gas Cooling • High Corrosive Gases • Gas to Gas Applications • Gas to Liquid Applications • High Pressure Applications

What makes superior quality tube fin heat exchangers?

There are several components that function together in order to design a tube fin heat exchanger. Engineers across the market make sure to achieve the following variables:

• The area of functioning of the heat exchanger • Tube walls’ thickness • Number of tubes needed, the category and its style • Metals used for making the heat exchangers • The level of heat that the electronic device / laser application / any other device produces, which needs to be cooled • Number of fans that will give air flow

Before you choose the heat exchanger, you should explain your requirements to the manufacture, and accordingly they will guide you to choose to right one, or they may suggest customized heat exchanger.

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How to Choose the Right Cross Flow Heat Exchanger

In a cross flow heat exchanger, the heat transfer occurs between a liquid that flows inside tube(s) or via air flowing past to tubes. This type of heat exchange is most commonly used for managing the heat transfer between a gas and a liquid.

Cross Flow Heat Exchangers Operate at High Efficiency

The large temperature differences between the different parts of the surface enables maximum efficiency for this form of heat exchange. This is true even when there is only a small surface area. Cross-flow Heat Exchangers can be constructed to be very compact according to the space requirements of the customer.

When it comes to building a cross flow heat exchanger, finding the right thermal solution is paramount to ensuring that you get superior heat transfer capabilities. This is done by thoroughly examining the manufacturer's offerings when it comes to the products and capabilities.

How Cross Flow Heat Exchanger Customization Affects Performance

The first step in a customization for a customer is to examine all aspects of the implementation case and to reflect on its operating principles. For any customization job, we first work to identify the customers preferences as far as the design which reduces cost and allows the project to be completed faster.

If the customization requirements request that the surface of the core is reduced, in turn a high performance fan should be used. The result is a heat exchanger that is more compact. The absorption power of the fan increases along with the noise level.

Instead, if the core's surface is increased, this in turn requires the use of a lower performance fan. The result is that you get a fan that has lower absorption power, a lower noise level and a more affordable price. On the flip side this heat exchanger will require additional space.

Some customizations call for an increase in the cooling power. In this instance, a high performance fan can be used, which means that the fan absorption, noise level, and price will also increase. If the surface needs to be increased along with cooling power, this option means that the heat exchanger will have a decreased noise level and fan absorption power. At the same time, the unit will require more space and will be more costly.

Be Proactive About Procurement

Adapting to the new normal amidst the COVID-19 pandemic requires that our customers be proactive when it comes to procurement. As a result, we encourage you to take some time to review our product pages, sales brochure, and engineering dimensions so that you can come up with your own configuration based on our existing products. Once you have reviewed our offerings, you should speak with our sales representatives.

Request More Information

At Thermogym, we design and manufacture high quality heat exchangers that are customized to your needs. Having designed and manufactured heat exchangers for some of the world's largest companies, we can guarantee that your product will meet the highest standards.

For more information about our top-of-the-line heat exchangers or to place an order, contact us today or complete our quotation form.

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Cooling Coil Maintenance: 5 Tips to Extend the Life of Your Cooling Coil

Having specialized in heat exchangers for more than 15 years, Thermogym has extensive experience across a variety of heat exchanger types, in many different industries. Although every type of heat exchange has its own unique function, as well as, disadvantages, proper maintenance is still key to extending the life of the heat exchanger. Regular maintenance can also help you avoid potential problems that may arise.

To help you establish best practices for maintenance, here are 5 tips to extend the life of your cooling coil.

1. Establish a Cleaning Frequency

How often cleaning is required for the cooling coil will depend on how efficient your filtration system is. Filtration systems that consume fresh air from the outdoors in urban areas will almost always require more cleaning than systems that are using intake air from low pollution locations. If the deposits build up, at some point they will become very hard or virtually impossible to remove. This is especially true for coils that have close fin spacings.

2. Choose the Right Cleaning Methods and Solutions

It is possible to use a compressed air jet or brushing by hand as a means of cleaning the cooling coil. Pressure washers can be used in some instances. However, in the case of finned tube heat exchangers, pressure washers could potentially bend and damage the aluminium fins.

As far as cleaning solutions, the best cleaning option is generally steam cleaning. However, in the case of build up, a degreasing cleaning solution could also be used. Cleaning should be approached strategically to avoid further pushing in contaminates. If there is any dust or dirt that has been dislodged during the cleaning process, make sure that all steps are taken to remove it so that it does not remain inside.

3. Use Proprietary Cleaning Solutions With Care

There are proprietary cleaning solutions for coils. However, some may have corrosive activities as these cleaning solutions may be strongly acidic or alkaline. Make sure that you only use the exact concentration recommended by the manufacturer and immediately rinse all of the solution so that all traces of it are removed.

4. How to Clean a Cooling Coil Inside a Closed System

Typically, internal cleaning is not required for a closed system. If a cleaning is required, this process should only be done via a reverse flush using only clean water. If there are other features present in the system, such as boilers or other heat exchangers that actually require more aggressive cleaning than the coils, the cooling coils should be isolated from the system before the internal cleaning procedure is conducted.

5. Create Ideal Conditions for Operation

Overall, when it comes to cooling coil maintenance what matters most is that the heat exchange surfaces are kept clean, and you provide conditions that are free of vibration and the potential for corrosion.

Contact Us

At Thermogym, you can expect to receive exceptional service along with the guarantee that your product is exactly what you are looking for. If you’d like to request more information, we’re here to help! Please do not hesitate to reach us with any questions or issues.

To learn more about our top-of-the-line heat exchangers and customization services, request a quote here.