Photo AI
10. (a) Using notes and freehand sketches, discuss the importance of any two of the following in Passive House design: - space heating energy demand - building form - thermal bridging - Leaving Cert Construction Studies - Question 10 - 2018
Question 10
10. (a) Using notes and freehand sketches, discuss the importance of any two of the following in Passive House design: - space heating energy demand - building... show full transcript
Worked Solution & Example Answer:10. (a) Using notes and freehand sketches, discuss the importance of any two of the following in Passive House design: - space heating energy demand - building form - thermal bridging - Leaving Cert Construction Studies - Question 10 - 2018
Step 1
Discuss the importance of space heating energy demand in Passive House design
Answer
Minimizing space heating energy demand is central to achieving the Passive House standard. It involves ensuring the building retains heat efficiently, which allows for greater energy conservation. This means maintaining an optimum indoor temperature, which is crucial for comfort, particularly during colder months. The Passive House standard specifies a maximum energy requirement of 15 kWh/m²/year for space heating. This is achieved through proper insulation, effective air tightness, and orientation for passive solar gains, resulting in reduced reliance on mechanical heating systems.
Step 2
Discuss the importance of building form in Passive House design
Answer
The building form significantly influences energy efficiency in a Passive House. A compact design helps minimize the external surface area, thus reducing heat loss. It is important to consider local architectural styles and ensure the design maximizes natural light and ventilation. A well-planned building layout, with appropriately placed windows, can enhance passive solar gains, contributing to overall energy performance.
Step 3
Three modifications to meet the Passive House standard
Answer
-
Provide a Draught Lobby: This modification would reduce heat loss by creating an air lock at the main entrance, minimizing cold drafts.
-
Increase Glazing on South-Facing Walls: Adding larger windows on the south-facing side would maximize solar gain, allowing for natural heating during the day while minimizing the use of artificial heating.
-
Utilize Structural Insulated Panels (SIPs): Implementing SIPs for the walls and roof would significantly improve insulation and reduce overall thermal bridging, assisting in maintaining indoor temperature more effectively.
Step 4
Show a preferred orientation for the upgraded design
Answer
The preferred orientation for the upgraded design should have the longest façade facing south or southwest, which allows for greater solar gain and minimizes heat loss. In the sketch, the sun path should be included to show how the building's position will capture maximum sunlight throughout the year. By aligning windows and living spaces towards the sun, the design will enhance natural light and improve thermal performance, reducing the need for heating and lighting during winter months.