About this presentation

related to ATMOsphere America 2018
published on 13 June 2018
17 pages

About the speaker(s)

John Prall

 

John Prall studied at the Rochester Institute of Technology in Rochester, New York, where he earned a Bachelor of Science in Mechanical Engineering. In 2012, Prall accepted his current position with Embraco, working as a Technical Support Engineer for the United States and Canada. At Embraco, Prall’s responsibilities include providing engineering technical support for commercial and aftermarket customers, including assisting customers with the selection and application of hermetic compressors. Prall also trains customers on compressor technology and market trends through customer visits, trade show presentations and webinar activities. Prall has over 14 years of experience in the commercial refrigeration industry. Prior to his role at Embraco, he held several different roles ranging from engineering to product management at Hussmann Corporation.

Chengzhi Tang

 

Chengzhi is a Senior Refrigeration Engineer at Helmer Scientific. A Ph.D. in Mechanical Engineering, Chengzhi brings in 13 years of refrigeration system design experiences for various commercial, laboratory, and medical applications and has spent the last 6 years designing refrigeration systems using natural refrigerants including CO2 and hydrocarbons. Chengzhi is currently focused on developing Helmer’ new generation refrigeration platform using hydrocarbon refrigerants. Previously, Chengzhi led the R744 refrigeration system development team at Crane Merchandising Systems.
Chengzhi is an active member of ASHRAE and a peer reviewer for several international academic journals.