AIR HANDLING UNITS - ASHRAE QATAR

1 AIR HANDLING UNITSTECHNICAL CATALOGT ecnical Publication Nr: 1 Powered by Self Quality AIR HANDLING UNITSTECHNICAL CATALOGT ecnical Publication Nr: 1 HSK_kitapcik_ENG 1/13/11 3:18 PM Page 1 Air HANDLING UNITS Technical CatalogHSK Technical Publications Nr:12nd Edition January 2011 HSK_kitapcik_ENG 1/13/11 3:18 PM Page and Fields of Applicat on or Air air Air of Air Conditioning Conditioning System Cooling Group (Chiller) HANDLING HANDLING unit Performance Leakage from the Bypass Bridging and Panel Structures of HSK Air Aluminum Carcase Air HANDLING Steel Carcase Air HANDLING Steel Carcase Hygienic Air HANDLING Positive Pressure Door Air Sterilization with the Ultraviolet Method Making Up the Air HANDLING (Electronically Commutated)

2 Motor Fans - Cooling Constructive Properties of Coil Capacity Selection Testing of Cleaning Measures Against Freeze-free Condensation Drainage Drop Expansion (DX) Recovery Plate Heat Heat Pipe Heat Recovery unit Horseshoe Heat Recovery Rotor Type Heat Recovery Double Rotor Air HANDLING UNITS Temperature and Enthalpy Efficiency in HeatRecovery Mixing and Acoustic Humidifying Air Washer Adiabatic Humidifying Electrode Steam Design Recommendations for and Application of Moist Bulb Temperature (DBT) Bulb Temperature (WBT) Point Temperature (Saturation Temperature) Humidity (w) Volume (v) (d) Total Heat (Enthalpy) (h) that are performed on psychrometric Heating Cooling and Flow Control Motors (Normal Spring Return) Sensor HANDLING unit Testing And Performance Measurement AIRWARE Air HANDLING unit Selection Drill Technology 6.

3 CERTIFICATESHSK_kitapcik_ENG 1/13/11 3:18 PM Page 3i in havan n flartland r lmas na konfor ama l iklimlendirme denir. Konfor iklimlendirmesi do ru yap lm fl ortamlarda yafla-yan insanlar, daha az yorulur, daha az hastalan r ve daha y ksek ifl verimi ile al fl rlar. klimlendirme sistemleri ile kHSK_kitapcik_ENG 1/13/11 3:18 PM Page 451. AIR CONDITIONING Air conditioning is defined as the conditioning of indoorair in order to maintain its temperature, humidity, cleanli-ness and air movement at levels suited to human health andcomfort or the industrial processes Purpose and Fields of Application or Air ConditioningAir conditioning is done for comfort or industrial purposes.

4 Comfort air conditioning People feel comfortable in specific temperature and humi-dity ranges and in environments where the air is clean. Comfort air conditioning is the conditioning of air to ac-hieve such an environment. People living in environmentswith proper comfort air conditioning get tired less, get sickless, and work with higher factors that should be controlled to achieve comfortableconditions with air conditioning systems are the following: a) Air Temperature It is quite important that ambient temperature be maintai-ned at the desired level regardless of the outdoor tempera-ture.

5 Though the range changes somewhat in winter andsummer conditions, people are comfortable in the approxi-mate temperature range 21-26 C. According to ISO 7730,these values are specified as 20-24 C in the heating season,and 23-26 C in the cooling season, both at 50% relative hu-midity. The air conditioning system used should be capableof cooling the indoor environment 6-7 C lower than theoutdoor temperature in the ) Relative HumidityRelative humidity is defined as the ratio of the water vapourin the air to the maximum amount of water vapour that canexist in the air at the same temperature. Relative humidityhas a significant effect on comfort.

6 The relative humidityrange desired for comfort is roughly 35-60%.C) Cleanness Removal of foreign materials like dust and microbes fromAir Conditioning ProceduresWe reserve the right to make alterations in technical informationHSK_kitapcik_ENG 1/13/11 3:18 PM Page 56the air is quite important for human health. In recent years,many diseases have been diagnosed that result from conta-minated or low quality indoor air. Thus, one of the conditi-ons expected from air conditioning equipment is to receivethe outdoor air by filtration and removing dust, dirt and ) Air VelocityThe air movement velocity varies with the temperature andthe conditions of use of the space.

7 In spaces such as mee-ting rooms and offices where high mobility operations arenot conducted, the air velocity should be m/s for coo-ling and m/s for heating. In spaces of higher activity suchas shopping centers, the air movement velocity can be in-creased a little more and conditioned between the values m/s. Air ConditioningIndustrial production required that appropriate environmen-tal conditions be created. In order to store the manufactu-red products, these conditions must be such that they pre-serve the structure of the product. While conditioning indus-trial spaces, and creating conditions where products will bemanufactured and stored, the conditions required for thehealth and maximum efficiency of the working staff are ta-ken into consideration and these conditions are Classification of Air Conditioning Central SystemsThese systems are used primarily for the conditioning of lar-ger buildings.

8 Air HANDLING UNITS , air ducts, vents and/or fancoil UNITS etc. constitute the system components. Heating-cooling-ventilation and humidity control is achieved by circu-lating water, air or coolant within the tubes and ducts of thesystem. Central systems can be classified in three main gro-ups;a) All-Air Systems These are systems where air is used as heat transfer systems provide sensible and latent cooling by trans-ferring air conditioned by cooling-de-humidification proces-ses to the living space through ducts and provide heating byconditioning heated air and transferring it to the living spa-ce through ) All-Water Systems The living space is heated or cooled by fan coil UNITS placesin each living space.

9 The cold water required for cooling istransferred to the installation by pumps from a central coo-ling group (a chiller), while the hot water required for hea-ting is transferred to the installation by pumps from the cen-tral boiler system. The comfort conditioning of spaces is ac-hieved by thermostat. c) Air-Water Systems Air and water systems employ the process of cooling or hea-ting spaces in a way that will also meet people s fresh air re-quirement, by transferring clean air that is conditioned in acentral unit or water that is cooled in a central cooling gro-up to fan coil Local Systemsa. Packaged UNITS These are UNITS which contain all equipment within a singlebody, that are capable of heating, cooling, and dehumidifi-cation and that allow for command Floor Standing- Floor Type- Ceiling Mounted- Window Typeb.

10 Split Type Air Conditioners These are UNITS that consist of two parts -an internal and ex-ternal unit -, which are capable of heating, cooling and de-humidification and which allow command Wall Mounted- Ceiling Mounted- Window Mounted- Floor Type- Floor Standing- Duct Type- Concealed Duct Air Conditioning System ElementsElements which constitute the system that conditions a spa-ce are the boiler, the water cooling group (chiller), the airhandling unit , ducts and installation elements. Selection ofthese elements to be compatible with each other has an im-pact on the overall performance of the system. The following factors should be considered in the selectionof air conditioning systems: - Initial investment cost- Comfort conditions - Noise- Aesthetics - Operating cost - Ease of installation - Energy expenditure - Ease of operationWe reserve the right to make alterations in technical informationHSK_kitapcik_ENG 1/13/11 3.