Thermal energy supply and storage in ehub and NEST 6 th SCCER HaE - - PowerPoint PPT Presentation

Urban Energy Systems Laboratory

BEST – Building Energy Systems and Technologies Group

Thermal energy supply and storage in ehub and NEST

October 25th, 2017 Empa, Urban Energy Systems Laboratory, BEST

• Dr. Luca Baldini

6th SCCER HaE storage Symposium

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Why demonstrators?

 Offer a real environment for technology integration and testing (living

lab with user feedback)

 Allow to take risks (failure is an option)  Foster collaboration with industry (PPP, co-creation space)  Provide visibility and raise awarness (lighthouse)  Great chance for systemic research (interplay of multiple technologies)

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NEST

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NEST

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ehub

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Energyhub

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ehub

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move

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Thermal infrastructure NEST

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Thermal infrastructure NEST

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Thermal infrastructure ehub

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Thermal/electrical infrastructure NEST/ehub

Ice storage 69m3 charge 30kW; discharge 20kW Ground heat 12m charge 4.7kW; discharge 7kW Ground heat 2x260m charge 2x9.7kW; discharge 2x14.6kW HP 100kWth HP 28kWth fuell cell 2kWth; 1kWel Empa – thermal Grids

2x1100lt 2x1100lt 2x1100lt

NEST Backbone Unit vw Unit m2c Unit x Unit x Unit x «Unit Backbone» ehub

Li-Batt NMC 96kWh SCaps .5kWh

PV PV

Empa – electrical Grids Elektrolyseur 200kVA Methanization ?? E-charger mobility 2x33kW PV 100kWp

PV

Batteries ??kW

move ehub

Unit vw Unit m2c

NEST Backbone

«Unit Backbone» Unit x Unit x Unit x

PV

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Energy storage technologies

Source: mckinsey.com

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Short term storage

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GHX built out of PEX for high temperature charging up to 60°C

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Use as heat source and short-term thermal storage (intra day)

Source: www.xorella-frank.ch

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Short and long term ice storage

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65 m3 and 6000 kWh

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Discharge power 35 kWth

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Heat source for heating / cold source for cooling

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NaOH storage integration in 2020

NaOH

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Activities started…

Source: Nokia

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Heat pump characterization

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Studying grid reserves through HVAC control  central element is heat pump for thermal/electrical coupling COP vs. Output power

COP vs. Inlet temperature

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Building demand emulation

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Following virtual building heat demand with heat pump while rejecting heat to the GHXs

10 20 30 40 50 60 12:59:39 13:11:39 13:23:39 13:35:39 13:47:39 13:59:39 14:11:39 14:23:39 14:35:39 14:47:39 14:59:39 15:11:39 15:23:39 15:35:39 15:47:39 15:59:39 16:11:39 16:23:39 16:35:39 16:47:39 16:59:39 17:11:39 17:23:39 17:35:39 17:47:39 17:59:39

Measurement Reference

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NRP 70 project Commelec

How to integrate up to 100% of renewables into distribution grids?

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Power quality problems such as over- and under-voltages

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High volatility of renewables needs to be compensated by fuel-based conventional gen Problems can be avoided by smart real-time control of power flows, and this is what the Commelec framework provides to maintain power balance at all times

Source: http://smartgrid.epfl.ch

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Commelec implementation at Empa ehub

Contact: www.sccer-hae.ch

• ffice@sccer-hae.ch

Swiss Competence Center for Energy Research Heat & Electricity Storage

Empa Laboratory of Urban Energy Systems Building Systems and Technologies Group

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WP 1 Thermal Energy Storage: Sorption-based seasonal heat storage