Energy Consumption Calculations Group 4a

Contents 1.Introduction 2.Methods 3.Tools 4.Country specific variations a.Finland b.Other Nordic countries c.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 / Finland E-value is a constructive daily per capita consumption of purchased energy (kWh E /m 2 a) 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 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!