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CHAPTER 2 Design Process of Low Energy Housing With Validated Effectiveness And Outline Of Elemental Technologies
CHAPTER 2
Design Process of Low Energy Housing With Validated Effectiveness
And Outline Of Elemental Technologies
Definition of Low energy housing with validated effectiveness
2.1 Design flow of low energy housing with validated effectiveness
Natural Energy:-Solar radiation
-Solar water heating-Use/control of wind-Daylight utilization
-Photovoltanic power generation
Heat control of Building envelope:
-Insulated building envelope planning
-Solar shading mehods
Mechanical techniques(High Efficiency Mechanical System:-Cooling/heating system planning
-Domestic hot water system-Ventilation system planning
-Lighting system planning- Introduction to high efficiency consumer electronics
- -treatment and efficient use of water and kitchen waste
Energy Housing with validative effectiveness
(LEHVE)
To reduce energy
consumption
Create comfortable
indoor environment
Possibility Of Natural Energy Utilization
Influences of weather conditions
Influence of site condition
Life style orientation
Classification of life style orientation
2.3.2 Setting Target Design Level of LEHVE
Natural Energy Application Technology
Natural Energy Application Technology
Heat control technology and building envelope
Energy Efficient Equipment Technology
Energy Efficient Equipment Technology
Uses Energy to be Reduced
Example design house of LEHVE in zone VI
Example design house of LEHVE in zone V
Continued…
Basic Item to be Considered for LEHVE
Hot humid region in Japan
Examining Application of elemental technologies
CHAPTER 3
NATURAL ENERGY APPLICATION TECHNOLOGY
3.1 Wind Utilization
•Wind utilization is a technology that aims to reduce cooling energy consumption and improve comfort, by actively introducing outdoor air into the building through cross ventilation when weather condition are effective
Purpose and key points of wind utilization1. wind utilization is a technology that aims to realize a pleasant
indoor thermal environment and reduce cooling energy consumption without relying too much on air conditioning through active introduction of outdoor air into the building and heat exhaust to outside
2. The possibility of wind utilization largely depend on the region and surrounding environment (trees, building, fence and any other obstruction will affect the wind flow to the house)
Purpose and key points of wind utilization..(2)3. An entrance and exist for the air are required to effectively introduce outside air into the building
4. The use of landscaping ingenuity to block solar radiation, such as planting tree around the house can keep down the temperature of wind introduce to the room
Purpose and key points of wind utilization5. Wind utilization technology consist of methods for contriving building shape and floor plans, and landscaping planning as well as methods for contriving the position, shapes and opening and closing operation of opening
6. the prerequisites of this technology is that the occupants appropriately open the openings
7. It is necessary to use opening parts with high wind resistance in the preparation for storm.
Energy conservation target level for wind utilization
Energy conservation target level for wind utilization
Requirement for achieving target levels1. zone classification (in Japan zone V or VI)2. weather condition 3. Site condition4. Lifestyle orientation of occupants and rooms5. Wind utilization methods
Weather conditions• Weather conditions : temperature, relative humidity, wind speed and
direction, influence of the possibility of wind utilization
• Example:
