Bettina Muster-Slawitsch AEE – Institut für Nachhaltige Technologien (AEE INTEC) A-8200 Gleisdorf, Feldgasse 19 AUSTRIA Integration of Solar Heat in Industry – method to select the best integration

CONTENTS  We know how to integrate a solar process heat plant – but where is it placed best?  Complex industrial environment  Tools and methodologies for systematic analysis  Criteria for selecting integration points

Integration Guideline

Basic selection criteria

Complex industrial environment  Several processes  Various products  Different operating schedules  Inter-dependencies between processes, waste heat and heat recovery

Complex industrial environment  Various technologies  E.g. Simple brewhouse process  Many technology options  Many heat recovery options

Technologies influence heat demand Product formulation influence energy flows, energy supply and make-up water heating demand

Technologies influence heat demand Product formulation influence energy flows, energy supply and make-up water heating demand

Technologies influence heat demand  Influence on net heat demand and requirements on different temperature levels  Influence on variability of heat demand

Systematic analysis is required  Overview of heat sinks and sources  Evaluation of heat recovery and thermal energy management  Existing heat exchangers  New heat recovery options  Identify where solar process heat can contribute best (to a hybrid energy supply system)

Solutions  Pinch analysis as systematic approach

Solutions  Simulation of energy flows of a thermal energy system Variable process demand profiles as base date (from measurements; time steps user- defined) Display of HX performance, storage stratification, remaining energy over time Variation of design parameters for optimized performance For complex projects In conjunction with energy supply - solar heat

Solutions  Criteria for the selection of integration points based on solar process heat concepts

Criteria for identification of best integration point  Theoretically very little make-up water demand (boiler)  KEG/bottle washing  connected to local heating network / large distance to solar  Pasteurization: flash pasteurization with high demand peaks at 70-75°C  Low estimated solar yield / Difficult regulation, large HX  Hot water demand only over weekends

 PROJECT CONSORTIUM -AEE INTEC (coordinator) -HEINEKEN Supply Chain B.V. -GEA Brewery Systems GmbH -process engineering -Sunmark A/S -solar engineering Introduction to SolarBrew Solar Brew: Solar Brewing the Future EU FP7 (2012 – 2015) Projekt Nr

State of the project BREWERY GOESS -Solar assisted mashing process m² ground mounted flat plate collector field -200m³ pressurized hot water energy storage tank -Commissioned: June million pints of beer per year brewed with the power from the sun* * assuming 60 MJ thermal energy consumption per hl of beer in the brewery Goess

BREWERY GOESS -Schematic diagram of the solar primary and secondary loop State of the project GEA brewery systems

State of the project BREWERY GOESS -Construction of the 200m³ solar energy storage

State of the project BREWERY GOESS -Construction of the 1,500m² solar thermal collector field 5 workers 1 crane foundation: 4 days collectors: 5 days

State of the project BREWERY GOESS -Construction of the 1,500m² solar thermal collector field

BREWERY GOESS -Solar heat integration to mash tuns -Retrofit of two existing mash tuns with heat exchanger templates State of the project

BREWERY GOESS -Construction of the heat exchanger templates State of the project

Change in product formulation can have tremendous effects on integration effort Future research Brunner et al., 2013 GEA Brewery Systems

Future research  Industry is changing  Emerging technologies  Biobased industry developments  Trends for more electrity use  Which new technologies can stimulate the use of renewable (solar) heat?  Which technologies must be developed for reacting best on the hybrid energy supply in future?  Close cooperation between process engineers and energy experts is necessary  Future goal: to develop solar process technologies and turn-key solutions