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An oil-fired central heating and hot water system for a two storey dwelling house is designed to provide independent control of hot water and space heating - Leaving Cert Construction Studies - Question 8 - 2008
Question 8
An oil-fired central heating and hot water system for a two storey dwelling house is designed to provide independent control of hot water and space heating. Using no... show full transcript
Worked Solution & Example Answer:An oil-fired central heating and hot water system for a two storey dwelling house is designed to provide independent control of hot water and space heating - Leaving Cert Construction Studies - Question 8 - 2008
Step 1
Using notes and a single-line diagram, show a typical layout for such a system.
Answer
To illustrate the layout of an oil-fired central heating and hot water system, we can represent both floors of the two-storey dwelling house with a single-line diagram that includes:
- Radiators: Three radiators on each floor are represented. The first-floor radiators are located in the living room, kitchen, and an additional room, while the second-floor radiators are in the bedrooms.
- Control Valves: Indicate valves for each radiator. Typically, a thermostatic valve is used for individual radiator control, while the system also includes a three-port motorized valve for directing the hot water.
- Pipework Sizes: Specify the typical diameters of the pipes, for example, a 22 mm diameter for the main supply line and 15 mm for the radiator connections. The single-line diagram should clearly label the size and type of all components.
- Water Flow: Arrow markings can indicate the circulation flow of the water from the oil-fired boiler to the radiators and back, ensuring clarity in the system's operation.
Step 2
On a separate diagram show an alternative system for providing domestic hot water which is not dependent on fossil fuels.
Answer
An alternative system for providing domestic hot water can be illustrated with the following components:
- Wood Burning Stove: This acts as the primary heat source, which is both renewable and sustainable. The stove can be represented with a chimney and connected to the hot water supply, ensuring heat exchange.
- Solar Panels: Indicate either flat panels or evacuated tubes positioned on the roof, which capture solar energy for heating water. This can be characterized by a simplistic drawing showing the sunlight being absorbed.
- Heat Exchange System: Show a heat exchanger that transfers heat from the stove or solar panels to the water supply.
Advantages:
- Sustainability and Cost: The use of a wood-burning stove or solar panels significantly reduces reliance on oil or gas, leading to considerable cost savings in the long term while utilizing renewable resources.
- Environmental Impact: This system is environmentally friendly since it produces no CO2 emissions and utilizes local resources, thus contributing to a reduction in fossil fuel consumption.