Paper format. Professional Engineers of
Ontario / Engineers Canada annual examination 16-Mec-B2 Environmental
Control in Buildings, May 2017, three hours, open book.
Eight problems of 20 points each; candidates are required to solve five, and all
questions carry the same value. ASHRAE psychrometric charts (SI and inch-pound)
and an R-717 pressure–enthalpy 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 and the psychrometric chart), Ch. 6
(air-conditioning plant cycles), Ch. 9 (cooling towers), 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. 25–27 (thermal and moisture performance of the building
envelope).
- Çengel & Boles, Thermodynamics: An Engineering Approach,
9th ed., McGraw-Hill — Ch. 11 (refrigeration cycles, including
multistage compression with a flash chamber) and Ch. 14 (gas–vapour
mixtures and air conditioning).
- National Energy Code of Canada for Buildings (NECB 2020) and CSA
F280 — the Canadian regulatory frame for envelope U-factors
and heating-load calculation.
Conventions used throughout. Moist-air properties are
computed from the ASHRAE Handbook — Fundamentals Ch. 1 formulation at a
barometric pressure of 101.325 kPa, so that every state point can be checked
against the charts appended to the paper. Enthalpy is referred to dry air at
$0^{\circ}\text{C}$ and liquid water at $0^{\circ}\text{C}$, i.e.
$h = 1.006\,t + W\,(2501 + 1.86\,t)$ in kJ per kilogram of dry air. Problems 3
and 6 to 8 are worked in the inch-pound units in which they are set, as the
examination directs.
