HVAC TECH

  How to control Temperature and Humidity in Air Handling Unit Overview Air Handling unit is a system used to supply temperature and Humidity controlled filtered air to the cleanroom. For air filtration various types of filters are used in AHU. And for temperature and Humidity controlling cooling and heating coils are provided in AHU. Goals Control the temperature of air used in the cleanroom  Control the humidity of air used in cleanroom  Air filters Specifications    The air Handling unit consists of Air filter  Cooling coil Heating coil Air blower HEPA Filter  Controlling of Temperature and Humidity  By Cooling Method  The cooling coil recirculates the chilled water having temperatures between 4°C to 6°C. This chilled water comes from the Chiller through centrifugal pumps. When we start the Air Handling unit blowers sucks the air through the pre filters of the air Handling unit. When blowers sucks air, it passes through the cooling co...

 Why ice forms at cooling coil and Suction line in Refrigeration system       it's all about the relationship between a temperature and pressure and how the pressure affect the boiling point of the refrigerant. As the pressure of refrigerant increases then the temperature and boiling point also increases,  when pressure decreased temperature and boiling point also decreases. Refrigeration and air conditioning systems take use of it to cool the air or liquid.   Normal Refrigeration System      In normal refrigeration system compressor compresses the refrigerant which causes the increase in pressure and temperature of refrigerant. The hot vapour refrigerant pass through the condenser in condenser heat exchange happens and refrigerant condensate into liquid forms.Before entering in the evaporator high pressure liquid refrigerant pass through the expansion of valve. The actual device used depends on the Refrigeration system but capillary t...

Choosing the right HVAC contractor   When you need a heating and cooling replacement or repair services, choosing a right HVAC contactor for the job is the most important part of the process.  Just because a HVAC contractor is popular doesn't mean they are the right fit for your facility. HVAC contractors will be always in demand because individuals and businesses constantly need their HVAC systems either serviced, repaired, or replaced. If you work with the right contractor then the quality of the job will achieved but if you work with the wrong HVAC contractor  then 50% of your work quality will be affected for your HVAC installation or repair services. Do your research about HVAC contractor, check his reputation and work quality, take reviews from his previous customers.Below are the some simple steps to keep it in mind while choosing HVAC contractor       HVAC Contractor Research and                   ...

 Refrigerant in refrigeration system    the fluid used for energy exchange in the refrigerating or heat pump is called the refrigerant. The refrigerant usually absorb heat while undergoing a phase change and then is compressed to a higher pressure and higher temperature.Allowing it to transfer that energy directly or indirectly to the atmosphere or medium being purposefully heated. Refrigerant  suitability for a given application depend on many factors including its thermodynamics physical and chemical properties and its safety. The significance or relative importance of each characteristics varies from one application to the next and there is no such thing as an ideal refrigerant for all applications some of the characteristics of general importance are as follows. Thermodynamics characteristics 1) High latent enthalpy of vaporization:- these means a large refrigerating effect per unit mass of the refrigerant circulated  in small capacity systems however result...

  What is Refrigeration System?     Refrigeration  is a process of moving heat from one place to another by the use of Refrigerant in a closed cycle. Oil management, gas and liquid separation, subcooling, superheating, desuperheating, piping of refrigerant gas or liquid, and two phase flow are the parts of refrigeration system. The refrigeration system used widely in various types of ues like in air conditioning, industrial Air Conditioning, commercial Refrigeration and industrial Refrigeration. This blog focuses on the system that uses halocarbons( halogenated hydrocarbon) as a refrigerant. The most commonly used halogen refrigerant are chlorine(Cl) and fluorine(F).       Halocarbons refrigerant are mainly classified in four groups  1)chlorofluorocarbon(CFCs), which contains chlorine, fluorine, carbon. 2)Hydrochlorofluorocarbons(HCFCs) which consists of carbon, hydrogen, Fluorine, chlorine. 3)Hydrofluorocarbons(HFCs), which contains hydrogen, flu...