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A wood-burning stove as shown, combined with a solar collector, is used to provide central heating and hot water for a compact three bedroom, two-storey house - Leaving Cert Construction Studies - Question 8 - 2018
Question 8
A wood-burning stove as shown, combined with a solar collector, is used to provide central heating and hot water for a compact three bedroom, two-storey house. (a) ... show full transcript
Worked Solution & Example Answer:A wood-burning stove as shown, combined with a solar collector, is used to provide central heating and hot water for a compact three bedroom, two-storey house - Leaving Cert Construction Studies - Question 8 - 2018
Step 1
Using notes and a single-line diagram, show a typical design layout for both the central heating and the hot water systems.
Answer
In the design layout, I would depict a wood-burning stove connected to a thermal storage tank and auxiliary systems, illustrating two independently controlled heating zones: one on the ground floor and one on the first floor. Each zone will include three radiators. The central heating will be demonstrated with a single line showing how the hot water circulates through the radiators and back to the stove.
- The pipes are typically 15mm or 22mm in diameter, depending on the specific heating requirements of the space.
- Use a diagram labeling each component including the stove, radiators, and pipe sizes to enhance clarity.
Step 2
Using notes and freehand sketches, describe two features that ensure that the system operates safely at all times.
Answer
Feature 1: Thermostatic Control of the Burning Rate
The system must incorporate a thermostatic control for the wood-burning stove, regulating the burning rate based on the temperature in the boiler. This maintains optimal efficiency, prevents overheating, and reduces the risk of fire hazards.
Feature 2: Pressure Relief Valve
The inclusion of a pressure release valve is crucial. It prevents excessive pressure build-up within the system, averting potential explosions and ensuring safe operation. Regular checks on this valve are essential to guarantee its functionality, thus safeguarding the system.
Step 3
Using notes and freehand sketches, show two design considerations that should be taken into account when selecting a preferred location of a chimney for the stove.
Answer
Consideration 1: Maximize Heat Retention
The chimney should be placed internally to maximize thermal retention. An internal location minimizes heat loss, ensuring that more heat is utilized, which is essential for efficient heating of the home.
Consideration 2: Proximity to Water Sources
Locating the chimney near bathrooms or kitchens allows for easier venting of waste gases and helps improve combustion efficiency. Adequate distance from combustible materials should also be maintained to ensure safety.