Using real measurements to examine large numbers of building envelopes Jacob Schmiedt Institute of Solar Research, German Aerospace Centre

1st Oct. 2015

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 1

What do we want?

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 2

•  Gather energy use data

•  Process and evaluate large amounts of data

•  Understand the observed energy use

•  Draw conclusions and develop recommendations for action

Proposed  IEA  EBC  Annex:  "Building  Energy  Epidemiology:  Analysis  of  Real  Building  Energy  Use  at  Scale“  (3rd  July  2015)

•  Technical facilities

-  Heating

-  Hot water

•  Properties of the building envelope

- U-values of components

- Defects

•  Inhabitants’ behaviour

-  Demand for comfort

-  Interaction with technology

•  Weather/Climate

Various factors determine the energy use of buildings

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 3

Current status:

•  Fast, cheap but no

quantitative information (e.g.

thermography)

or

•  Fast, cheap, quantitative but

no real measurements (use of

typologies)

or

•  Accuarte measurements but

long times, expensive

Our Goal: Real, accurate measurements in short time

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 4

+

+ •  Combine technologies from

-  Energy research

-  Security

-  Remote sensing

•  Consider several scales

•  Fast measurements large numbers

•  Measurements as input for

modeling and simulations

Remote sensing

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 5

•  High resolution 3D-models from

overflight (VIS and IR)

•  Thermal deformation of buildings

can be measured with radar

interferometry

Amplitude of periodic deformation of the central train station in Berlin in east-west direction (above) and in height (below)

Combining conventional and new techniques

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Conventional thermal image of a lawn (left) and thermal image after optimized evaluation (right)

•  Optimization of common technniques, e.g.

-  Infrared

-  Tracer gases

-  Automated visual

inspection

•  Additional techniques, e.g.

-  Ultrasound

-  Mikrowave sensing

•  Use techniques to prepare refurbishments and for quality control

•  Customers:

-  Owners

-  Architects, civil engineers

-  Communities

•  Individual data and evaluation for customers

•  Anonymized data for research data base

•  Combination with other data in „urban data structure“, e.g. energy use,

sociological, demographics, climate (to be developed in joint project of

Helmholtz centers)

Market and research

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 7

•  Need for fast, accuarte measurements of properties of building envelopes

•  Use modern sensor techniques from various fields

•  Create a product for planning and controlling refurbishments

•  Combine generated data with other data to understand energy use on large

scales

Summary

> Real measurements on building envelopes > Jacob Schmiedt > 1st Oct. 2015 DLR.de • Chart 8

Thank you for your attention