Category Archives: Air Conditioning

What Are the Parameters for Selecting Industrial air conditioner?

07
Aug

The selection of air conditioners for industrial use has a number of features compared to the selection of household air conditioners. It is often about large areas, large dimensions of equipment, complex installation, the ability to install individual settings for a large number of rooms. The cost of an error here will be quite high – from the failure of an expensive air conditioner to damage to material values ​​and the health of people.

Industrial air conditioners are developed to service areas of more than 300 square meters. They are often installed in buildings where an individual micro climate is required for each room – in hotels, shopping centers, banks. What industrial air conditioner will solve your problems?

Industrial air conditioning systems. Device, features and types

Despite the fact that industrial air conditioners have been produced for more than 100 years, at present only five types of them can be distinguished.

Multi zone VRF and VRV air conditioning systems

VRV and VRF are two names for the same industrial systems. This multi-zone air conditioning system includes up to 64 indoor units and from one to three external. The maximum total length of inter block communications is 300 m. The maximum height difference is 50 m. For each indoor unit, you can set your own indoor temperature and provide an individual micro climate.

The error of the set temperature is only 0.5 o C.

Chiller-Fan Coil System

The system “chiller-fan koil” is characterized in that inside the building is used not coolant, but water or antifreeze. The central chiller is called the chiller, and the heat ex changers in the rooms are fan coil units. The system compares favorably with the fact that the maximum distance between the chiller and the fan coil is practically unlimited, water flows through ordinary pipes.

Central and roof conditioners

Central air conditioners are multi functional. They can be used as air conditioners, ventilation systems, air purifiers and humidifiers. They are called central because the air is processed in the central module and then distributed through the ducts to the rooms. The central air conditioner can serve several rooms or one large one – a theater hall, an indoor stadium, a production hall. Installation of industrial air conditioners of this type and laying of communications for them are characterized by increased complexity. If possible, it is better to choose a simpler to install roof air conditioner. Unlike the central air conditioner, which requires an external source of cold, the roof air conditioner is a mono block.

Cabinet air conditioners

This type of industrial air conditioners is designed to maintain a constant temperature over large areas for a long time. Cupboard air conditioners are mono block and with a remote condenser.

Precision air conditioners

Precision air conditioners are characterized by high accuracy of maintaining the desired temperature and humidity. They consist of outdoor and indoor units. Work in wide limits of power – from 5 to 100 kW.

Comparison of industrial air conditioning systems

When selecting industrial air conditioners, many parameters need to be taken into account, including the type and configuration of air conditioning zones, the nature and change of heat load, etc.

Power consumption

The minimum level of power consumption in multi zone VRV and VRF-systems. However, the various components of the industrial air conditioning system, for example, a chiller or a separate fan coil, can be selected taking into account the minimum energy consumption. Although high power consumption traditionally distinguished central and roof air conditioners.

Ventilation option

The industrial system differs in that you can set any configuration depending on the task: you can also integrate a central air conditioner into the chiller-fan coil system and you will get a system with ventilation. The multi zone system and the chiller-fan coil system can be additionally equipped with central air conditioning or ventilation systems. This will provide full and adequate ventilation.

Cost of

You can buy an industrial air conditioner fairly inexpensively, but you should take into account the complexity of installation, which, in turn, depends on the complexity of the technical task and equipment configuration. Rooftop air conditioners are the most low-cost, but installing them can take a lot of time and money. It should also be borne in mind that large industrial air conditioning systems require maintenance personnel.

Features

In the central and roof conditioners it is not possible to adjust the set parameters for each room individually.

To fully understand the problems of selecting expensive industrial equipment for air conditioning and ventilation, engineering education and experience in this field are required. However, pre-orient in the terminology and principles of operation of air conditioners, as well as anyone can ask competent questions to a specialist.

Maintenance and Repair of Ventilation and Air Conditioning Systems

08
Jun

The process of ventilating the room is accompanied by a complete replacement of the air in it (additionally cleaning, drying, heating, cooling, ionization, etc.). The process of ventilation of the premises is implemented using special modern equipment, which is responsible for maintaining the required level of humidity, temperature and cleanliness. In order for the equipment to serve properly and the repair of ventilation systems does not become the main expense item, it is necessary to maintain the systems in a timely manner.

Tracking device operation parameters and quick troubleshooting will prolong equipment life, as well as create comfortable conditions for being in the room.

The variety of types of ventilation and refrigeration equipment, the complexity of their internal assembly leads to the fact that the maintenance of air conditioning and ventilation systems at least once a year is a necessary necessity. With the observance of the rules of operation and timely professional diagnostics, the equipment will serve without complaints for many years.

Why is it important to maintain air exchangers?

Regardless of which room is in question, public or private, clean air and its active movement are crucial factors. In modern construction, modern materials are used that provide minimal heat loss in the cold period of the year or heating of buildings in the warm season through enclosing structures. Thus, more and more buildings are sealed and “do not breathe”, thereby creating the unpleasant sensations of a long stay in a confined space. That is why it is important to maintain the air-exchange equipment in a functional and in good condition, as well as to timely maintain the ventilation system.

The statistics confirms that in case of poor air circulation in the working room, the efficiency of the personnel drops noticeably and the number of sick employees increases. It is impossible to trace this connection directly, since air conditioners and ventilation continue to work for the first time after installation without qualified service – outwardly it will not be obvious that they need professional debugging. But in a contaminated installation, pathogenic bacteria are rapidly developing, and simple diagnostics of ventilation and air-conditioning systems will help specialists quickly identify and select the list of appropriate repair procedures.

Professional assistance and maintenance includes:

  1. checking and replacing filters;
  2. performance check and heat exchanger cleaning;
  3. control of the amount of refrigerant;
  4. cleaning and lubrication of machinery parts;
  5. performance check electronic control.

To ensure proper operation, the initial design and installation of ventilation and air conditioning systems must be carried out by professionals. In the future, qualified assistance may be needed in the following cases:

  1. problems in the operation of automation in the operation;
  2. redevelopment of premises (redistribution of air flow, movement of exhaust umbrellas, balancing the system);
  3. clogging filters, grids;
  4. clogging of heat exchange equipment
  5. imbalance or improper operation of actuators

Types of repair and maintenance work

Depending on the procedures used, the maintenance of industrial ventilation and ventilation of residential buildings can be divided into several groups.

Service, as a rule, is carried out twice a year and includes the following procedures:

  1. check for dents, chips that affect the operation of the device damage;
  2. inspection of the fan, cleaning of dirt and accumulated dust;
  3. impeller balancing check;
  4. measuring and controlling the noise level, identifying the causes of its occurrence;
  5. adjustment of belts and their tension;
  6. flushing heat exchangers;
  7. maintenance of automatic ventilation systems;
  8. inspection and cleaning of the internal surfaces of all sections of the unit;
  9. tightening electrical connections and other maintenance and repair work.

Maintenance for air conditioning equipment is divided into the following types:

  1. clearing the drainage system;
  2. checking the level and pressure of the refrigerant;
  3. carrying out planned work to prevent possible damage, and test the device in all modes;
  4. cleaning of internal filters and heat exchangers;
  5. search for refrigerant leaks and fix them when detected;
  6. setting overheating temperature and checking its differences on the indoor unit;
  7. pulling and maintenance of electrical connections and other procedures.

When the state of technology is not determined, and there are problems, a special expert assessment is needed. If the design, installation and maintenance of ventilation and air conditioning systems were carried out by professionals, then determining the cause of the breakdown and quickly developing a repair plan will not be difficult.

Cost of services

It is not recommended to neglect annual preventive maintenance of air exchange equipment. Even if outwardly it seems that the system is in good condition, without timely maintenance, it will fail much faster than provided by the operating documents.

The cost of maintenance depends on the intensity of use of devices, as well as on the main characteristics:

  1. installation site;
  2. configuration;
  3. past service life.