Electrical Design of a Heat Rejection System

Alireza Samani and David Effa
Case revision date: 
5 pages (Case Study)

Smith + Andersen, located in Toronto, Ontario, is one of the leading Electrical/Mechanical consulting companies in Canada. As an electrical consulting group, the electrical group is mainly responsible for the design of electrical circuiting of projects for new buildings, based on the National and Ontario Electrical Safety Code. The company recently completed an electrical system design project for the heating rejection system of University of Toronto’s Robarts library. The project was intended to decrease the existing operating costs by replacing the old fan coil units with heat pump rejection, which includes two fluid coolers and one pump. All of the mechanical equipment of the old fan coil unit has been replaced with the new heat pump system. As a result, the electrical requirements for the system are different from the previous fan coil system.

Alireza Samani, a third year Electrical Engineering co-op student from University of Waterloo, was asked to complete the electrical design of a new heat rejection system for the renovated university library.

Learning objectives: 

The teaching objective of this case is to illustrate the effective use of circuit analysis for developing the design of a power supply. The case will give students the opportunity to evaluate commercially available components and regional and national standards. The case also introduces common examples of power supply circuits to students.

Key words: 
Heat rejection; load; electrical requirements, Ontario Electrical Safety Code
CEAB attributes: 
Module 01– Case Study
Module 02– Needs Analysis
Module 03 – Preliminary Design
Module TN – Teaching Note

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