Software and Method. EINSTEIN Methodology and tool for a fast energy assessment

Transcription

1 Software and Method Methodology and tool for a fast energy assessment Jürgen Fluch AEE Institut for Sustainable Technologies (AEE INTEC) A-8200 Gleisdorf, Feldgasse 19 AUSTRIA

2 Overview Introduction : Idea and approach : software : method : results present state proposals : energy audits

3 Energy consumption in EU27 25% of final energy consumption in EU27 (2006) for space heating and cooling in buildings 28% of final energy consumption in EU27 (2006) for industry 69.5% of final energy consumption in industry for heat production 57% at low and medium temperature levels at 400 C and less Strategic Energy Review 2008; Quelle: Eurostat Data für 2003, 32 Länder: Quelle: ECOHEATCOOL (IEE ALTENER Project)

4 Energy saving targets EU-targets by 2020 ( ): Reduction of emissions by 20% Increase of energy efficiencies by 20% Increase of the use of renewable energies up to 20%

5 Increasing energy costs Energy costs [ /a] Energy demand [MWh/a]?? Real data of an Austrian brewery, 2008

6 Reduction of energy demand Energy costs [ /a] -25% savings Energy demand [MWh/a] -25% Alternative proposal: reduction of energy demand

7 Areas of application Industries and SMEs with large thermal energy demand at low & medium temperature up to 400ºC Manufacturing sectors: Food industry, Breweries, Pharmaceutical, chemical, Pulp & paper, Textile,

8 Areas of application But also other medium and large scale consumers of heat and cold: Large buildings (e.g. commercial centres, hospitals, offices,...) District heating and cooling networks Other (e.g. desalination, etc.)

9 Challenges in energy audits Optimised supply of thermal energy in industry is complex: Developed infustructure in the industry without real data available (esp. SME) Averaged data for different periods Cost and time consuming measurements necessary Processes at different temperature levels and different operating times have to be integrated and combined Combination of different heat supply technologies for an optimised energy supply High acquisition and evaluation demand while the potentials can hardly be foreseen

10 Approach of (1) Development of a fast-audit to estimate potentials Standardised data acquisition, modeling and audit steps Automated background calculations Holistic vision of energy supply and demand Process optimisation demand reduction measures Heat recovery Intelligent combination of heat and cold supply technologies Implementation of renewables

11 Approach of (2) Standardisation Standardised procedure Standard process models Standard modules for heat supply systems Consideration of all available energy efficient technologies Semi-automated Guided audit procedure Decision aids for proposal generation Automatic energy, economic, & environmental evaluation Automatic generation of reports LOW COST THERMAL AUDITS -- easily affordable for SMEs -- high quality -- reliable -- user friendly Quick & dirty fast estimation of missing data Tools for obtaining a complete data set based on fragmented and incomplete information Data submission by distance Fast audits based on data delivered via or questionnaire Possibility of self assessment

12 Approach of (3) Holistic vision solar thermal Polygeneration Electricity, Heat & Cold Heat recovery and process integration No use of electricity for thermal processes RES biomass Heat exchangers PINCH-analysis Heat exchanger networks Demand reduction Process optimisation Heat and cold networks CHP & trigeneration (engines, turbines, fuel cells) Thermal chillers and heat pumps Efficient distribution (steam, etc.) Efficient heat & cold supply Efficient equipment (boilers, burners, chillers)

13 Approach of (4) Analysis of energy demand and availability in terms of QUANTITY of energy QUALITY of energy - temperature Einstein enables evaluation of potential for heat recovery application of more efficient technologies at lower temperature

14 10 audit steps Preliminary contacts: Inform and motivate PRE AUDIT Pre - audit data acquisition Processing of preliminary information Quick&Dirty preliminary evaluation EVALUATION Of AUDIT ALTERNATIVES PRO- POSAL On - site walk - through energy audit OR Detailed by - distance data acquisition Analysis of the Status quo Conceptual design of saving options and preliminary energy targets definition Energy performance calculation & environmental analysis Economic and financial analysis Reporting and presentation of the proposal to the company

15 DATA ACQUISITION AND CHECK DATA ACQUISITION (QUESTIONNAIRE) CONSISTENCY CHECK Software ENERGY STATISTICS DATA ANALYSIS BENCHMARKING ALTERNATIVE PROPOSALS: DESIGN PROCESS OPTIMISATION HEAT RECOVERY ALTERNATIVE PROPOSALS: EVALUATION HEAT&COLD SUPPLY SYSTEMS ENERGY AND ENVIRONMENTAL PERFORMANCES ECONOMIC ANALYSIS ALTERNATIVES COMPARISON REPORT REPORTING

16 Model of an energy system in Final energy input Connections Fuels/Elect. - Equipes Heat & cold supply ( Equipments ) Connection Equipes - Pipes Distribution & Storage ( Pipes ) Connection Pipes - Processes Processes FET i FET j USH j USHPipe m UPHProc m UPH k LEGEND connections of sub-systems external energy input thermal energy flows (heat & cold) available waste heat (from source) QHX Eq QWH Eq QHX Pipe Heat recovery system QHX QWH QWH Pipe QHX Proc QWH WHEE QWH Proc recovered waste heat (to sink) Waste Heat from Electrical Equipment

17 Model of the process T po1 h po1 T po1r h po1r T po2 h po2 T po2r h po2r Thermal losses (UA) T env T p T pi2 h pi2 T pi2r h pi2r q m, i2 T pt2 Thermal mass ( ) mc p q m, o2 T pi1 h pi1 T pi1r h pi1r q m, i1 T pt1 q m, o1 Internal heat recovery A Heating of circulating fluid T ps B Heating of bath or oven T ps

18 evaluation of the present state (1) Primary energy consumption Total By fuel By equipment

19 evaluation of the present state (2) Heat and cold demand By processes By temperature levels By time demand

20 results of a brewery Case study brewery 2 proposals evaluated 1 presented as final proposal Present state Saving FET by equipment Primary energy consumption [MWh] 47,620 11,685 fuels [MWh] 20,020 - electricity [MWh] 27,600 11,685 Share of renewable energy [%] - - CO 2 emissions [tons/a ] Investment costs [EUR] - Payback period [years] 11,905 1,852 UPH by process

21 heat recovery (1) Goal: Theoretical potential of energy savings by heat recovery (prior to energy supply systems design) Save fuels and avoid over-dimensioning of supply equipment Heat recovery potential Analysis of a minimal external heat and cold demand Potential for heat recovery Design of a heat exchanger network Design and optimisation of a heat exchanger network Reduced energy demand and required temperature level as basis for exergetic optimised integration of heat and cold supply

22 heat recovery (2) Method: Pinch-Analysis Hot and cold composite curves Grand composite curve Results Theoretical heat recovery potential Necessary external heat/cold supply at the different temperature levels

23 Pinch Analysis Hot and cold composite curve Pinch temperature separation of production system in two halves: Above pinch no cooling is necessary Below pinch no heating is necessary No energy should be transferred across the pinch (efficient thermodynamic use of energy) Temperature [ C] Power [kj/s]

24 results (1) BEFORE Nonrenewable share decreased energy input reduced AFTER Reduced external input Renewable share increased Waste heat recovered and used as input Reduced energy demand Less heat wasted

25 results (2) Comparison present state and proposals Primary energy consumption Energetical evaluation Environmental evaluation Economical evaluation Report generation

26 - outlook II: Performance of 72 energy audits in 10 European countries (Austria, Germany, United Kingdom, Spain, Italy, France, Luxembourg, Ireland, Slovakia, Bulgaria) Introductory and advanced trainings for energy consultants and auditors in all named participating countries National projects within additional audits are performed

27 Source: is a free open source software based on a GPL Lizenz: cts/einstein is independent from the operating system Using Linux, Unix, Windows..

28 Software and Method Methodology and tool for a fast energy assessment Jürgen Fluch j.fluch@aee.at AEE Institut for Sustainable Technologies (AEE INTEC) A-8200 Gleisdorf, Feldgasse 19 AUSTRIA