Understanding chiller basics and P-H diagrams

S. Zaheer Akhtar is a Senior Technical Process Engineer with TAI Engineers and has more than 35 yr of experience in the chemical, gas and power generation industries. Akhtar served for 9 yr with Exxon Chemicals at its ammonia-urea manufacturing plant and more than 20 yr with Bechtel Power Corp. and its affiliates, such as Bechtel Oil & Gas, Bechtel Nuclear and Bechtel Egypt. He also worked as a Plant Engineer at the Ghazlan Thermal Power Plant in Dammam, Saudi Arabia with Saudi Electric Co. Akhtar has been a participant member of ASME Performance Test Code Committees 4.3 (Air Heaters), 19.2 (Pressure Measurement) and 19.3 (Temperature Measurement). He has also authored several papers covering various process/mechanical topics related to industry. Akhtar earned an MS degree in chemical engineering from the University of Manchester Institute of Science & Technology (UMIST) – England, and is a Professional Engineer registered in the state of New York.