Paper format. Professional Engineers of
Ontario / Engineers Canada annual examination, 07-Mec-B2 Environmental Control
in Buildings, December 2014. Three hours, open book, any non-communicating
calculator. Eight problems of 20 points each; candidates are required to solve
five. ASHRAE psychrometric charts (SI and IP) and an HFC-134a
pressure-enthalpy diagram are attached to the paper. All eight problems are
solved here.
Reference texts.
- ASHRAE, Handbook — Fundamentals (Ch. 1 Psychrometrics, Ch. 16
Ventilation and Infiltration, Ch. 18 Nonresidential Cooling and Heating Load
Calculations, Ch. 19 Energy Estimating, Ch. 21 Duct Design).
- McQuiston, Parker & Spitler, Heating, Ventilating and Air Conditioning:
Analysis and Design, 6th ed., Wiley.
- W. P. Jones, Air Conditioning Engineering, 5th ed., Butterworth-Heinemann.
- Stoecker & Jones, Refrigeration and Air Conditioning, 2nd ed., McGraw-Hill.
- Carrier Air Conditioning Company, Handbook of Air Conditioning System
Design, Part 1 (the ESHF / apparatus-dew-point method used in Problem 1).
- CSA B52 Mechanical Refrigeration Code; Canada's Ozone-depleting
Substances and Halocarbon Alternatives Regulations (SOR/2016-137); National
Building Code of Canada (vapour and air barriers).
Reading the numbers. Chart properties here are
computed from the ASHRAE psychrometric formulations rather than scaled off the
printed chart, so a candidate working graphically should expect agreement to about
the width of a pencil line — roughly ±0.3 °F on a dew point and
±1 % on a humidity ratio.
