Chillers with water-cooled condenser. Monoblock chillers with air cooled condenser

Water chillers

This section of our Internet portal presents chiller models with water-cooled condenser. Unlike models with an air condenser, which are designed optimally for operation in air conditioning systems of buildings, a water condenser chiller or, as specialized experts call it, a “water water” chiller with its design is fully consistent with its use in production processes. Today it is no longer possible to imagine the production of thermoplastics and dairy products, or the operation of laser machines and the production of food drinks, the production of which involves a natural fermentation process without the use of constant temperature systems. This is where the industrial water cooling chiller became a core element of the production process. A water-cooled chiller system has a number of advantages over models with an air condenser.

Advantages of a water chiller:

1. Minimum overall dimensions for such installations

Due to the fact that heat is removed by liquid, the condenser design has much smaller dimensions than a capacitor in which heat is removed by blowing air. This makes it possible to place the refrigeration machine directly in the workshop, which has a positive effect on the service life of the equipment, and also makes it possible to use them throughout the entire calendar year.

2. Since the operating principle of the water chiller allows it to be used all year round, models of water-cooled units are equipped with components with increased wear resistance, which has a positive effect on the reliability of chillers.

3. The use of clean running water, which is used in general during production, to remove heat from the condenser has a positive effect on the cooling capacity of the chiller and its service life.

Working principle of water cooled chiller

The main components of the chiller are the refrigeration circuit units: compressor, evaporator, condenser and thermostatic valve.

The external liquid circuit of the cooling system using a chiller takes heat from other equipment involved in the production process and carries it to the heat exchanger (evaporator). This is where the intersection of two different temperature contours of the chiller system occurs. Heat from the external circuit is transferred to the internal circuit of the chiller, further due to physical properties refrigerant and other components of the chiller, heat is transferred to the condenser, where the heat is removed by the flow of running water in the cooling tower or by blowing with an air flow in the dry cooler.

Important to remember

Chillers are equipment that ensures the operation of all production process units that require heat removal. The practice of using refrigeration units (chillers) in production processes proves that it is much more economical to use a water-cooled chiller than an air-cooled one. This is due to the fact that air-cooled chillers are rarely used for all 12 months of the year, therefore the units are designed for fewer machine hours. If we take into account that expensive equipment is almost always used in production, we can draw the following conclusion: failure of a chiller with remote cooling the condenser will lead to the breakdown of many installations requiring heat removal. Therefore, do not forget that the price of a water chiller includes not only the cost of the refrigeration machine, but also a certain guarantee of long-term operation of other equipment that cannot be operated without the operation of the chiller.

How to choose the right water chiller and buy suitable model?

First of all, it is necessary to calculate the cold performance of the chiller. Otherwise, the installation will not perform its functions or will wear out. The second step is to pay attention to the possible placement of the condenser (it should be understood that during air cooling large number heat into the air space) or connection to running water. The next question that will confront you is whether a chiller hydraulic module is required and, if necessary, determine it technical specifications. If your technical specialists know all the selection parameters, then choosing an industrial chiller at the best price in our store will not be difficult for you. A well-thought-out product sorting filter will help you quickly get suitable models. If you have difficulties at any stage of selecting a chiller in Moscow or any other city in the Russian Federation, then immediately contact our engineers for advice. We are always ready to help you choose a chiller model that is suitable strictly for your parameters; only from us you can buy equipment from various manufacturers, and the price will be lower than the market average, since our company has signed agreements with official representatives manufacturing plants in Russia. You can buy a chiller in Moscow using the service of a free visit to the site by an engineer from our company.

Refrigeration machines, or chillers, are classified by how heat is removed from the condenser. In most models, this process occurs using outside air. But in some conditions it is more practical to do this with water.

A water-cooled chiller differs from an air-cooled device. Its design uses a shell-and-tube condenser, which is cooled using a cold water.

When purchasing equipment, it is important to pay attention to a number of important aspects:

Cooling power. This value depends on many indicators and is calculated depending on operating conditions: type of coolant (used clean water or a mixture with glycol), coolant temperature at the chiller inlet/outlet (if a high indicator is provided, it means more power), condensation temperature. The power of the device depends on the conditions in which it operates. When purchasing, you must immediately provide information about the conditions for using the chiller. The optimal temperature at the coolant inlet/outlet is 12/7C. Outside temperature should be +35C.

Thermostatic valve (TRV). One of the important elements of the refrigeration circuit is the thermostatic valve. To obtain reliable and durable operation, it is worth purchasing a chiller with an electronic expansion valve. Mechanical is cheaper, but may require greater costs in the future.

Case material. Experts advise paying attention to this special attention. The most practical option is a galvanized body. Often the material needs to be discussed separately at the time of purchase.

Compressor. Chillers are used various types compressors. The most popular are spiral, screw, centrifugal. Scroll and screw compressors are considered a reliable and practical option. They are durable and do not require high costs for additional maintenance. Centrifugal compressors are used in chillers with very large cooling capacities.

Heat exchanger type. The buyer is often faced with the choice of pipe materials used in a shell-and-tube heat exchanger. Pipes made of titanium, cupronickel or stainless steel are used when using aggressive cooling media (for example sea water), as well as in food industry.

Guarantee. Do not neglect such an important detail as the warranty for equipment repairs. Other than that equal conditions you should give preference to the option with a longer warranty period.

Additional purchase details. It is worth asking the seller what type of freon is used in the chiller. If necessary, additional parts such as mesh filters to protect the condenser and water filters are also purchased. A remote installation display can be purchased to make it easier to monitor the chiller remotely.

Operating principle of water-cooled chillers

The water chiller includes a condenser, compressor, evaporator and thermal expansion valve. Liquid freon is supplied to the evaporator, where it boils, after which it evaporates and at the same time takes heat from the coolant. From the evaporator the refrigerant into gas state enters the compressor, where it is compressed and heated. Then it enters the condenser, where it condenses, i.e. it becomes liquid, and the heat generated is removed with the help of water. After this, liquid freon passes through the thermal expansion valve and again ends up in the evaporator, the process repeats.

Benefits of use

Compactness. Air cooled chillers take up a lot of space due to the required condenser blowing area. The heat exchanger in a water chiller is smaller, and therefore its design is more compact.
Advantages of the location. The water condenser chiller does not require outdoor installation to operate. The device is often installed indoors. By placing it in a basement or technical room, you can save a lot of space.

Scope of application

You can install a chiller with a water condenser almost anywhere. In an office space, the use of such equipment will help save space and not spoil the facade of the building, since it can be installed directly inside the room.

It is also convenient to use water cooling in production. If it is possible to install the chiller near a water source, this will help save money on laying and replacing pipes.

Buy a water-cooled chiller from Yantai Moon Group ("Moon Group") in Moscow

A water chiller is a profitable and practical way to create the correct microclimate in any room. Our company is the official representative of the Moon Tech group of companies in the region, which manufactures heat control equipment.

Presented on our website large selection water-cooled chillers.

Great experience companies and a rich customer base have allowed the company to establish itself as a conscientious manufacturer selling quality products. The prices for our equipment compare favorably with most, thanks to direct deliveries from the manufacturer.

To find out the exact cost of equipment, get advice or place an order, just leave a request using the form feedback or by calling the phone number listed on the website.

It is a device that performs the task of cooling liquid coolants due to water circulating in it. It serves as a good alternative to systems that use air environment, and in some cases is even the only possible option heat removal from the condenser.

Such units are designed for indoor installation and often form part of central indoor air conditioning circuits. Usually a special room is allocated for them: basement, technical floor, pumping station, ventilation chamber, utility room, etc.

Refrigeration circuit structure

Chillers are not an independent element; they are always included in complex system, which assumes the presence of coolant cooling modules, pumps, pipelines and fan coil units themselves, serving the end consumers of the generated resource.

The chiller itself consists of:

refrigeration circuit (set of compressor, expansion device, condenser and evaporator water heat exchangers, filter drier);
automation;
protective devices.

During operation, the device processes the coolant for its further transfer through pipelines to fan coil units or other heat exchange units. The condenser circuit of a water-cooled chiller communicates with a remote cooling tower or dry cooler (mounted outside the building), where the working fluid is cooled. A special substance circulates inside it (in most cases, a non-freezing liquid), whose movement is supported by the set circulation pumps. An important advantage this method heat removal from the condenser is the possibility of using external coolants, for example, running water taken from nearby bodies of water.

Types of refrigeration machines

Depending on the purpose and specific use of water-cooled modules, there are different types chillers:

According to the nature of the compressor used, devices with scroll, screw and oil-free (Turbocor) compressors are classified;
Depending on the power of the equipment, they are distinguished low-productivity structures (up to 150 kilowatts), medium-productive(up to 400 kilowatts), high-performance(over 400 kilowatts);
By the class of heat exchangers, installations with plate, shell-and-tube and flooded heat exchange devices are determined;
Based on the number of refrigerant circulation circuits, chillers with 1, 2, 3, 4 circuits are called;
Based on the nature of the refrigerant, systems operating on coolants R-410a, R-22, R-134a, R-407C are distinguished.

Each of the listed types of equipment turns out to be viable under specific operating conditions.

Main advantages of water cooled chiller

A significant part of the refrigeration equipment offered to consumers today are ergonomic designs characterized by extreme energy efficiency. The advantages of these designs include:

compactness (unlike air-cooled systems, water chillers do not require a significant area for blowing the condenser, which has a positive effect on the working area of the heat exchanger and, as a consequence, the size of the refrigeration module itself);
extension availability existing system“chiller-fan coil” by replacing/adding equipment with higher power;
year-round operation of equipment (production of cold throughout all seasons of the year, with cooling of the coolant without a refrigeration cycle, due to heat transfer and without the use of additional equipment);
accessibility of internal installation of the product (water-cooled equipment can be installed not only outdoors, but also in a building);
powering any system clean water(for example, water supply - when installing a structure inside a building or river - when it is placed externally).

Thanks to the huge selection of monoblock chillers presented on modern market, the consumer can easily find equipment that exactly matches his requirements both in terms of performance and energy efficiency. IN modern conditions Innovative models of water-cooled chillers are being updated, which are equipped with microprocessor control and advanced control systems, which simplifies their setup and maintenance by the operator.

Specifics of chiller operation

Classic water chillers are recommended for installation inside buildings characterized by significant heat dissipation rates. This solution seems appropriate from both a financial and practical point of view. Moscow and others major cities In Russia, this equipment is widely used for installation as an element of air conditioning systems for industrial, commercial and residential spaces. Similar equipment configurations can be found in large residential complexes, airports, shopping and entertainment centers, hotels, public institutions and other places with large crowds of people.

Water cooled system includes chiller combined into unified system with an n-number of fan coil units located in different rooms of the same building. The distance between circuit elements can vary over a significant range. It depends on the capabilities of the pumps with which the structure is equipped and the thermal insulation characteristics of the pipes involved in working system. In practice, such a structure turns out to be much more cost-effective than purchasing separate split systems.

The chiller, like any refrigeration machine, has a condenser in its refrigeration circuit so that the gaseous refrigerant after the compressor turns into a liquid state to be supplied for subsequent throttling.

Depending on the design and manufacturer, the chiller is equipped with capacitors different principle cooling.

Air cooling
Water cooling

Most often, chiller buyers choose a design with an air-cooled condenser, since there are at least two reasons for such a choice: a simpler design and a lower cost of such a chiller.

However, there are some factors that may influence the choice of a water-cooled chiller.

Calculated maximum temperature condensation when designing a standard chiller is 50C. If the condenser is air-cooled, then this corresponds to an air temperature of 35C. If the chiller is located on the sunny side, where it is exposed to direct sunlight during the day. sun rays, then the temperature “35C” is based on the following calculation: at least 10C from solar radiation and 25C direct air temperature. At air temperatures above 25C, the air condenser may not completely condense the refrigerant. In this case, choosing a chiller with a water-cooled condenser is the only correct one. Such chillers operate stably at air temperatures up to +45C, in the case of using an open cooling tower or a closed cooling tower with irrigation, and the sun's rays do not affect its location in any way. It is also possible to use a dry cooler, but this significantly reduces the permissible temperature environment and the electrical power consumption increases.

In many cases, chillers are used in winter period for heating If a chiller with an air-cooled condenser is used, it can be installed in a warm room, the hydraulic circuit can be filled with water, but the heat exchanger will have to be blown with air using centrifugal fans. The air itself must be supplied and discharged through air ducts. Such design solutions make the equipment more complex and lead to a significant increase in cost. Centrifugal fans also create a lot of noise, which makes it difficult to find a place to install the chiller.

When installing a chiller with an air condenser outdoors and operating it in the heating mode in winter, the design is significantly simplified, because you just need to fill the hydraulic circuit with antifreeze liquid.

When installing a chiller with an air condenser outdoors and operating it in the winter in cooling mode, in addition to filling the hydraulic circuit with antifreeze liquid, it is necessary to use an additional expensive fan speed controller to maintain the condensation pressure, and starting after a long stop will be difficult, especially when low temperatures environment. This complicates its design and leads to a decrease in chiller performance.

All similar negative factors are eliminated by using a chiller with a water condenser, which can be located in any warm room. In this case, to operate in winter, you only need to fill the hydraulic circuit of the condenser and install a simpler option - a three-way valve with a drive to more accurately maintain the condensation pressure. This greatly simplifies the operation of the chiller.

Chillers are a functional and powerful refrigeration machine, which is necessary for high-quality cooling of the coolant in the form of a liquid substance. The device is actively used in industrial air conditioning systems, as it is economical.

Main features of water chillers

Refrigeration devices have several classifications. The main criterion when dividing into types of chillers is the method of heat removal from the condenser. In many cases, it is used for this purpose outside air. But in some situations it is advisable to use a liquid substance - water.

Home distinguishing feature chillers with water type cooling from an air device lies in the design of the capacitors. The water unit does not have a tubular-finned heat exchanger, but a plastic, shell-tube or plastic-finned heat exchanger.

Plastic type condensers have many advantages over shell-and-tube devices; they have a smaller volume, which allows the use of less refrigerant.

You can purchase a water-cooled chiller by leaving a request on the website frienergy.ru.

Advantages and disadvantages of water chillers

Water-cooled units have some advantages over air-cooled chillers:

Compactness. Air devices are large in size, since to ensure the required heat removal, an impressive blowing area is needed. As a result of this feature, about half the volume of the refrigeration machine is occupied by the condenser.

Water has excellent thermodynamic properties. The liquid has higher heat capacity and density compared to air. This provides the opportunity to reduce the size of the heat exchanger and therefore the chiller itself.

The presence of the ability to install devices indoors. Water chillers do not necessarily require placement in the open air, since they do not require outside air to function. Therefore, devices are often installed indoors.

This advantage is very important in situations where the required large outdoor area for installing an air chiller is not available. Compact water chillers are often installed in technical rooms, basement areas and pumping stations.

The main disadvantage of water-cooled devices is the need for water to operate. Different liquids can be used to operate the chiller. To avoid clogging of the heat exchanger, it is necessary to install a special filter.