17-11-2012, 01:57 PM
EMBODIED AND OPERATING ENERGY+EVALUATION TOOLS FOR BUILDING ENERGY
Evaluation Tools For Building Energy.pptx (Size: 484.15 KB / Downloads: 33)
Embodied energy
The energy required to extract, process, manufacture, transport and install building materials.
Embodied energy types
Initial embodied energy
Direct energy: Transportation and construction processes
Indirect energy: Acquire, process and manufacture
Recurring embodied energy
Energy of building maintenance and renovation (exclusive of janitorial)
Methodologies of embodied energy:
Embodied energy analysis is interested in what energy goes to supporting a consumer, and so all energy depreciation is assigned to the final demand of consumer.
Different methodologies use different scales of data to calculate energy embodied in products and services of nature and human civilization.
International consensus on the appropriateness of data scales and methodologies is pending.
This difficulty can give a wide range in embodied energy values for any given material.
In the absence of a comprehensive global embodied energy public dynamic database, embodied energy calculations may omit important data on, for example, the rural road/highway construction and maintenance needed to move a product, human marketing, advertising, catering services, non-human services and the like.
Such omissions can be a source of significant methodological error in embodied energy estimations.
Without an estimation and declaration of the embodied energy error, it is difficult to calibrate the sustainability index, and so the value of any given material, process or service to environmental and human economic processes.
Operating energy
“Energy consumed during the in-use phase of a building's life is called as operating energy”
Reducing the operational energy use and increasing durability should be the prime concerns of architects who wish to design and build “green” buildings.
Evaluation Tools For Building Energy
Heating and cooling systems play a significant role in the increase in the energy efficiency of buildings by using innovative technologies and renewable energy systems.
The European Commission underlines the contribution of the heating and cooling systems in the recast EPBD (Energy performance of buildings directive) and prepares a new mandate to update the CEN (European committee for standardization) standards linked to EPBD.
To design energy efficient buildings and systems, professionals need sophisticated tools.
Tools able to show the positive impact on the energy efficiency of heating and cooling systems and based on verified performance data.
No "details" can be neglected in low energy or nearly net zero energy houses or buildings