Energy Consumption Calculations Group 4a. Contents 1.Introduction 2.Methods 3.Tools 4.Country specific variations a.Finland b.Other Nordic countries c.Italy.

Energy Consumption Calculations

Group 4a

Contents1. Introduction2. Methods3. Tools4. Country specific variations

a. Finlandb. Other Nordic countriesc. Italy

1.Introduction- Why calculate energy consumption?

- EU (EU Energy Efficiency

Directive (2012/27/EU)

- Cost savings (during lifetime -

design process might be more

costly... )

- Reduction of CO2 emissions

1.Introduction - Drivers for energy consumption- Demand for comfort levels

- Time spent inside the buildings

- Income growth

- Building size and service demands

- Energy prices

- Energy efficiency of the building

- Population growth

- Climate

- etc….

2. Methods, Calculation by hand- E-value = kWh / m2

- Elements in the calculations:

● Water consumption and hot water

● Electricity consumption

● Energy consumption of air conditioning

● Thermal load of the building

● Energy efficiency of windows

2. Methods, Computer based simulation- Several different simulation programs

- Inputs

- Facility space information

- Types of energy used

- Time period and energy data

- The costs associated

3. Tools 1/4: IDA-ICE- Dynamic energy simulation tool that can be used for calculating:

● total energy consumption / CO2 emissions

● energy balance & indoor air conditions

● heating, cooling & ventilation capacities

- Owned and marketed by a Swedish company EQUA.

- Based on building geometrical description, which can be brought from a drawing programme, e.g. AutoCAD

Parameters (input) Results (output)

3. Tools 1/4: IDA-ICE

Heat balance 3D model

3. Tools 2/4: RIUSKA- Also a dynamic programme that can be used for simulating energy

consumption, indoor air conditions, heat losses and heating and cooling capacities.

- Developed by a Finnish company Granlund, DOE-based.Linked with MagiCAD.

- Based on building 3D model, which can be drawn with MagiCAD or brought from another programme

- Parameters (structures, equipment, loads and schedules) determined by the user.

3. Tools 2/4: RIUSKA

Yearly energy consumption Indoor air temperature for alternative windows and shades

3. Tools 3/4: CADS Planner Hepac- Finnish market leader of HVAC designing and documentation.

- Data based modelling and calculation for

➢ ventilation

➢ heating

➢ piping

➢ building automation

- 2D work drawings and 3D models.

- Good tool to gather information needed for energy report and audit.

3. Tools 3/4: CADS Planner Hepac

3. Tools 4/4: EnergyPlus

- U.S. Department of Energy’s building energy and performance simulation program.

- For engineers, architects and researchers.

- Modelling

● energy consumption for

➢ heating, cooling, ventilation, lighting

● plug and process loads

● water use in buildings

- Console based program.

- Energy plus doesn’t include ‘user-friendly’ graphical interface.

- Output data for third-party graphical user interfaces

● DesignBuilder

● EFEN

● gEnergy

● N++ and lots more

3. Tools 4/4: EnergyPlus

4. COuntry Specific variations / FinlandE-value is a constructive daily per capita consumption of purchased energy

(kWhE/m2a) weighted by coefficients

defined by the energy forms used.

Coefficients for different energy forms (Finlex 2013):

Electricity 1,7

District heat 0,7

District cooling 0,4

Fossil fuels 1,0

Renewable fuels 0,5

4. COuntry Specific variations / Nordic countries● Calculation methods similar – only small differences

● Finland and Norway- Elemental approach

● Denmark and Sweden- Design value from delivered energy

4. COuntry Specific variations / sweden● Swedish building code (BBR

2009)

● Standard depends on:- Climatic zones I, II and III- Non-electric or electric heating

4. COuntry Specific variations / italy

Italian legislation : UNI/TS 11300

The limit of energy performance index is a function of:

- Climate zone (A...F)

- Volume of the building

Software: EDILCLIMA EC700, Calculating the energy performance of buildings

Thank you!