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Published since October 2007 for use in the Czech Republic. The calculation method is based on the delivered energy needed under standard indoor and outdoor conditions. The basic process of the calculation is divided into two stages:
- Calculation of energy demand (calculated on the standard use) of the building, or its zones; the calculation of heat losses, and heat gains, required in each space in order to maintain specified internal conditions;
- Calculation of energy consumption (building, zones, according to the energy demands); the calculation of the energy required by the energy systems (boilers, AHU units, DHW systems, lighting, etc.) needed to provide the necessary heating or cooling, or humidity control, etc.
The calculation method is based on the simplified dynamic calculation. The energy demand can be calculated from monthly, daily, and hourly simplified values. Hourly calculations better represent the complexities of HVAC systems (mainly because of cooling) performance.
Screen Shots
Keywords
EPBD, Energy Performance Certificate, Delivered energy, Energy Demand Calculation
Validation/Testing
Czech national and CEN standards were used for developing the Tool.
Expertise Required
Simple training.
Users
Approximately 500 users in the Czech Republic.
Audience
Energy auditors.
Input
Building geometry, thermal characteristics, schedules, efficiencies of boilers, coolers, appliances.
Output
Output tables with EP Certificate.
Computer Platform
Windows PC
Programming Language
MS Excel
Strengths
Easy to use
Weaknesses
MS Excel
Contact
Availability
Freely available at:: http://tzb.fsv.cvut.cz/projects/nkn/?page=nastroj-nkn&NKN_SID=e7dcae58ce1eac5d5b86a895b60a729d
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