ZEMCH 2012 International Conference Proceedings - page 644

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Scotland to date. This study helped visualise the effects of each option on the total
housing energy consumption, operating energy cost and carbon dioxide (CO2) emissions.
The cost-effectiveness of each option was also carried out based on the operating cost.
In this study, the future value was calculated using a future worth method based on the
time value of money concept—e.g. a period of 10 years and 10% interest rate. To
optimise the performance of the PV/T roof system proposed in this study, PV roof
ventilation cavity should be sealed properly to enhance the extraction of fresh air heated
by PV, while the air flow should be retained higher than 0.5m/s to secure the expected
amount of heat extraction to supplement indoor space heating. Bypass arrangement
may be required for prevention of overheating on hot summer days. Not to mention,
insulation of ducts is essential for optimal performance of heating and MVHR systems.
The MVHR system design is out of the scope of this feasibility study so the system
design and installation methods should be studied further.
References
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