Ali Aljari HVAC Services

15/07/2021

Electrical Technician with experience in industrial electrical works

26/05/2021

We need industrial electricians and AC technicians. salary 1100 + accommodation,medical,transport, over time as per UAE labour law.free visa.
Note: Age 20 to 30
Send cv : [email protected]

06/12/2018

Beauty of weld

04/12/2018

Since R11 has highest potential to cause the depletion of ozone layer, as per the Montreal Protocol, its use and production has to be stopped completely in the phase manner. R-11 is now being replaced by other environment friendly refrigerants, of which the most common is R-123.

If the R-11 refrigeration equipment that were manufactured before 1990 are being replaced by R-123 (dichlorotrifluoroethane) refrigerant then some alteration would be required in the chiller. It is required to replace the seals, gaskets, bushings and diaphragm of the chillers. In case of the hermetic compressors, it is also important to change the motor, and improvement in the efficiency of the other compressors may be required. For retrofitting the R-11 equipment improvement in the efficiency of the heat exchangers, replacement of the expansion valve and the improvement of the controls are also required.

But one should remember that refrigerant R-123 is hydrochlorofluorocarbon (HCFC) and even it has ozone depletion potential though small. By January 1, 2020, the production and use of even this refrigerant has to be stopped completely.

04/12/2018

Search on Linkedin

26/07/2018

By Donald P. Gatley, P.E., Fellow/Life Member ASHRAE

26/07/2018

Daikin launches a new generation of inverter driven air-cooled screw chiller series

Daikin launches a new generation of inverter driven air-cooled and water-cooled screw chiller series with refrigerant R-1234ze(E). The Air-cooled chiller range (TZ series) will be available from 130 kW up to 830 kW cooling capacity. The Water-cooled chiller range (VZ series) will be available from 340 kW up to 1600 kW cooling capacity. The selection […]
https://goo.gl/t7cb5U

26/07/2018

17/07/2018

http://www.aa-hvacservices.com/