Paper format. Professional
Engineers of Ontario / Engineers Canada annual examination
07-Mec-B2 Environmental Control in Buildings, December 2016,
three hours, open book. Eight problems of 20 points each;
candidates are required to solve five, and all questions carry the same
value. Psychrometric charts and an R-22 p-h diagram are appended to the
paper. All eight problems are solved here.
Reference texts for this subject.
- W. P. Jones, Air Conditioning Engineering, 5th ed.,
Butterworth-Heinemann — the standard reference for this
examination code; Ch. 2–3 (psychrometry), Ch. 5–6 (heating
and cooling loads), Ch. 15 (fans and duct design).
- McQuiston, Parker & Spitler, Heating, Ventilating and Air
Conditioning: Analysis and Design, 6th ed., Wiley — Ch. 3
(moist air), Ch. 5 (heat transmission in building structures), Ch. 8
(energy estimating and the degree-day method), Ch. 12–13 (fluid
flow, fans and duct design).
- ASHRAE Handbook — Fundamentals (2021) — Ch. 1
(psychrometrics), Ch. 14 (climatic design information), Ch. 18
(non-residential cooling and heating load calculations), Ch. 21 (duct
design), Ch. 26 (heat, air and moisture control), Ch. 30
(thermophysical properties of refrigerants).
- Moran, Shapiro, Boettner & Bailey, Fundamentals of Engineering
Thermodynamics, 9th ed., Wiley — Ch. 10 (vapour-compression
refrigeration and heat pumps).
- ANSI/ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air
Quality; ANSI/ASHRAE Standard 55, Thermal Environmental
Conditions for Human Occupancy.
- Canadian frame: National Building Code of Canada 2020
and its Appendix C design temperatures; National Energy Code of Canada
for Buildings 2020; Environment and Climate Change Canada degree-day
normals for Toronto and Ottawa; CSA B52 Mechanical Refrigeration
Code; Canada Green Building Council LEED Canada and the CaGBC Zero
Carbon Building Standard for Problem 5.
Check: assumptions carried through this
paper. Cover-page instruction 1 invites a clear statement of any
assumption. Standard barometric pressure of 101.325 kPa is used throughout;
moist-air properties follow the ASHRAE Handbook — Fundamentals Ch. 1
formulation (Hyland–Wexler saturation pressure, so results agree with
the appended chart to chart-reading accuracy rather than being read off it);
R-22 properties are on the IIR datum and agree with the appended p-h diagram. Problem-specific assumptions — the coil bypass factor, climate and
degree-day data, fuel prices and equipment efficiencies, duct roughness, and
the CLTD / SCL / CLF table entries — are stated where they are first
used.
