In a NATO forces kitchen in Afghanistan, there was a problem of smoke from the wood fired ovens of cooking all over kitchen and dinning ha. The entire kitchen and dinning hall of over 300 people sitting area walls and ceiling became dead black due to smoke during the initial period of 30 minits of firing the ovens. There were over 12 wood fired ovens each of appx one meter dia. The exhaust and ventilation system was designed by a leading HVAC and ventilation firm and the US Core of Engineers. When the matter could not be solved, a Mechanical Engineer in the weekly meeting asked for a sanction of US $2,000 for the necessary changes to make and solve the problem and was granted. Using the pressure difference formula between supply air and exhaust to the chimney, he increased the dia of the drive pulley by 0.5" and found the 2 Groove A sec belt get elasticated after some time running. He changed both drive pulley of the blower and drive motor to 2 grove B section but the motor was over loaded. Since he has no fund to buy a 10 HP motor to replace the existing 7.5 HP, he searched through the old scraped store and found a 7,5 HP motor similar to the existing one and fixed it in same line on the right side of the driving end with the existing one on the left side, He replaced the drive wheel and pulley to 4 Groove B section and synchronised both motor to run one on left side 2 groove and another on right side 2 groove of the drive end of the blower, Ofcourse the diameter of the new are 0.5" bigger than the original. The problem of smoke solved and the engineer was awarded a gold Medal by the Core of Engineers of US Army, the 1st one to a civilian in the world, Team of people from all over other NATO bases and states lined up with the engineer to find out how he solved the problem. How is this PC?
Kitchen Exhaust
Re: Kitchen exhaust
