Air Handling Unit
In order to provide cooling and heating and comfort conditions of one or more spaces, as well as air conditioning and standardization of spaces with a specific use, an air conditioner is used. Standardization of carbon dioxide and filtration of various pollutants to sensitive levels required by clean rooms, as well as the possibility of energy recovery.
Construction air conditioner can be used in various residential, office, commercial, educational and other places. There is no structural difference between these devices and only their dimensions, the type of filters used, whether or not they are equipped with dehumidifier and dehumidifier equipment, as well as the percentage of air returned to the devices are different. For example, an industrial air conditioner that works in a polluted environment, it is better to be equipped with filters for absorbing pollutants, or in a building air conditioner, in addition to the importance of temperature control at different hours of the day, the issue of regulating and controlling fresh air is also important.
Air Handling Unit
Standard Air Handling Unit SAHU
The simplest air conditioner includes an air inlet, which usually has a washable aluminum mesh filter, which is placed in a V-Type to provide a suitable contact surface. In addition, it includes at least one cooling or heating coil and at the end a fan Section. It is the blower. Table AHU-1 lists the dimensions of this type of air conditioner in the production capacities of this company in (mm). Now, if according to the calculations and design, it was necessary to add parts such as other coils, a return air mixing box or substrates of bag filters. Extract the from Subtitle values and add it to the length of the device.
Air Handling Unit
Hygienic Air Handling Units SAHUH
Hygienic air conditioners, also known as hospital air conditioners or clean room air conditioners, are devices with special requirements in design and construction, which are capable of completely sterile and clean air that is free of dust, suspended particles and pollutants. Provide for places such as hospitals, instrument labs and clean rooms. Observance of health issues in the field of pharmaceutical products is also a necessary precondition in the quality of pharmaceutical products. Avoiding airborne pathogens is a top priority. In the places of production and development of pharmaceutical materials, the presence of flawless, perfectly hygienic and sterile air is very important. Therefore, the use of hygienic air conditioners to reduce or prevent the effects of pathogens in the air is a must for the pharmaceutical industry. The VDI standard belongs to the German Society of Engineers and the VDI 6022 standard is a set of technical guidelines to ensure that health requirements for air conditioning systems are met. In fact, it is a guideline for sanitary HVAC systems to prevent adverse effects on room air.
Standard VDI 6022 is the requirements for planning, design, operation and maintenance of air conditioning and air conditioning systems and states their components to achieve hygienic conditions in accordance with the rules in the relevant user. In addition, it serves as a basis for health inspections. However, these requirements are primarily defined as the goal of health care. All occupied rooms or spaces in places that are regularly used for more than 30 days a year or more than two hours a day.
Air Handling Unit
Types of evaporative cooling air conditioners – Air Washer
As mentioned before, the air is heated or cooled by passing through a heating and cooling coil in an air conditioner and enters the ventilated space. In some geographical areas that have low relative humidity and naturally the temperature difference between dry and wet bulb Temperature is relatively large, it is possible to use a relatively cheaper evaporative cooling system to create cold air, with this method we will be able to Reduce the air temperature to a temperature close to the wet bulb temperature by passing air over a wet surface or space where water is sprayed. For this purpose, air conditioning devices are designed that instead of its cooling coil, the part that has cellulose pads and is constantly kept wet by the water pump of the surface of these pads is replaced. This term is called Zent device.
In the air washer device, instead of the wet surface, a spray space is used where water turns into very small particles and the air, while passing through this space, exchanges heat with water particle and its temperature decreases. Obviously, if the temperature reduction is suitable for the desired space of the project, the project will not need to use a chiller and other peripheral equipment.
