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An oil-fired boiler is used to heat two independently controlled heating zones, one on each floor, in a two storey dwelling house - Leaving Cert Construction Studies - Question 8 - 2009
Question 8
An oil-fired boiler is used to heat two independently controlled heating zones, one on each floor, in a two storey dwelling house. Using notes and a single-line diag... show full transcript
Worked Solution & Example Answer:An oil-fired boiler is used to heat two independently controlled heating zones, one on each floor, in a two storey dwelling house - Leaving Cert Construction Studies - Question 8 - 2009
Step 1
Design layout for the heating system
Answer
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Diagram Layout: Start with a single-line diagram illustrating the oil-fired boiler placed centrally. Designate the two heating zones: one on the ground floor and one on the first floor.
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Radiators: Show three radiators (R1, R2, R3) for each zone: ground floor (R1, R2, R3) and first floor (R4, R5, R6).
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Pipework Sizes: Indicate that a 22mm pipe is used for flow and returns for the main distribution lines and 15mm for the pipework to each radiator.
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Control Valves: Integrate control valves (V1 and V2) to manage flow, located on the return pipe to prevent excessive heat if constructed of plastic.
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Thermostatic Controls: Indicate room thermostats (T1 for the ground floor and T2 for the first floor) control the motorized valves for each zone.
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Important Notes: Provide alternatives for the primary circuit connection to the hot water storage tank, emphasizing that it should occur before the control valves.
Step 2
Outline two advantages of connecting a solar collector to the system
Answer
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Renewable Energy Source: Solar collectors harness energy from the sun, which is a renewable and sustainable source. This helps reduce reliance on non-renewable energy sources and lowers energy costs in the long run.
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Environmental Benefits: Utilizing a solar collector is environmentally friendly as it does not release CO₂ emissions, contributing positively to climate change mitigation efforts. Additionally, it provides a continuous supply of warm water, fulfilling up to 60% of domestic hot water requirements.