An Advanced hygrothermal design tool "hygIRC 1-D"

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An Advanced hygrothermal design tool "hygIRC 1-D"

van Reenen, D.

An Advanced hygrothermal design tool “hygIRC 1-D”

Van Reenen, D.

IRC-ORAL-611

An Advanced Hygrothermal

Design Tool “hygIRC 1-D“

NRC-CNRC Construction

hygIRC 1-D– What is it?

hygIRC 1-D– What is it?

‰

hygIRC 1-D

–

_{a user-friendly, one-dimensional}

hygrothermal model

–

_hygrothermal

•

_{hygro (Gr. Moisture) + therm}

ē

(Gr. Heat)

–

_{Simulates movement of heat, air, and}

hygIRC 1-D – What does it do?

hygIRC 1-D – What does it do?

υ

υ

, WV, P

, WV, P

T

T

Exterior Conditions

Idealized Wall

Interior Conditions

Moisture transfer

Moisture transfer

Moisture transfer

Heat transfer

Heat transfer

Heat transfer

Cl

ad

di

ng

Sh

ea

th

in

g

m

em

br

an

e

Sh

ea

th

in

g

In

su

la

tio

n

Va

pou

r

bar

rie

r

P

ai

nt

ed

dr

yw

al

l

hygIRC 1-D – Component Modules

hygIRC 1-D – Component Modules

HAM hygIRC

Solver

Output tools

Climate database

Interior

conditions

Building envelope

design

Material properties

database

hygIRC 1-D – Solver

hygIRC 1-D – Solver

‰

Built around hygIRC solver

‰

Benchmarked

–

_{experimental data}

–

_{international project}

hygIRC 1-D – Solver

hygIRC 1-D – Solver

‰

Simultaneously solve the following:

–

_{Mass balance equations}

•

_{moisture content (MC) and vapour}

pressure

–

_{Energy balance equations}

1-D hygIRC – Solver

1-D hygIRC – Solver

‰

1-D hygIRC can be used for

–

_{parametric analysis: changing weather}

(locations), materials, for example

–

_{what if scenarios: such as standard or}

acrylic stucco

‰

Best handled by 2-D hygIRC

–

_{air leakage}

–

_{water leaks}

hygIRC 1-D – Input

hygIRC 1-D – Input

HAM hygIRC

Solver

Building envelope

design

Interior

conditions

Material properties

database

Climate database

hygIRC 1-D – Input

hygIRC 1-D – Input

Climate database

Climate database

‰

Currently has 19

Canadian locations

‰

6 US locations

‰

30 to 40 years for each

location

‰

Basic hourly elements

•

_{Dry bulb, RH, wind}

speed and direction,

solar radiation, rain,

cloud cover

‰

Stored in relational

database

hygIRC 1-D – Input

hygIRC 1-D – Input

‰

Setting interior

Temperature and

Relative Humidity

Interior conditions

Interior conditions

hygIRC 1-D – Input

hygIRC 1-D – Input

Interior conditions Dialog

Interior conditions Dialog

‰

Interior Conditions

–

_{T always controlled}

•

_seasonal

•

_{balance point}

–

_{RH controlled or}

uncontrolled

•

_{controlled - set points}

•

_uncontrolled

–

_{statistical model}

–

_moisture

hygIRC 1-D – Input

hygIRC 1-D – Input

Building envelope

design

Building envelope

design

La

ye

r 1

La

ye

r 2

La

ye

r i

La

ye

r j

Lay

er

n

-1

ay

er

n

‰

Each layer has

–

_composition

–

_{material properties}

–

_thickness

‰

Examples

–

_{Layer 1: Stucco}

–

_{Layer n: painted drywall}

Wall Layers

hygIRC 1-D – Input

hygIRC 1-D – Input

Material properties

database

Material properties

database

‰

Contains 79 common

construction materials

‰

Some properties are

•

_WVP

•

_{Liquid diffusivity}

•

_{Air permeability}

•

_{Heat capacity}

•

_{Thermal conduction}

‰

Measured at IRC

‰

Stored in a relational

database

hygIRC 1-D – Output

hygIRC 1-D – Output

HAM hygIRC

Solver

Building envelope

design

Interior

conditions

Material properties

database

Climate database

hygIRC 1-D – Output

hygIRC 1-D – Output

‰

hygIRC calculates:

•

_{for node in each layer}

•

_{for each hour}

‰

T, RH, Q, freeze and thaw

cycles, RHT index

‰

Output interval

•

_{every n hours, days,}

months

‰

File accessible and can

be exported

Output tools

hygIRC 1-D – Output

hygIRC 1-D – Output

Output tools

Output tools

‰

Time history

•

_{Show time history of}

hygIRC 1-D – Output

hygIRC 1-D – Output

Output tools

Output tools

‰

Total moisture

•

_{Time history}

•

_{Time series for n}

hygIRC 1-D – Output

hygIRC 1-D – Output

Output tools

Output tools

‰

RHT index can be output

•

_{RHT =}

(T - T

_threshold

)

z

(RH - RH

_threshold

)

Summed over time

‰

Typical thresholds

•

_T

threshold

= 5°C

•

_RH

hygIRC 1-D – Output

hygIRC 1-D – Output

Output tools

Output tools

‰

Freeze thaw cycles

hygIRC 1-D

hygIRC 1-D

‰

hygIRC 1-D Summary

–

_{User friendly interface}

–

_{Benchmarked solver}

–

_{Material database}

–

_{Weather database}

‰

For more information contact

hygIRC 1-D Team

hygIRC 1-D Team

‰

Khaled Abdulghani

‰

Steve Cornick

‰

Wahid Maref

hygIRC 1-D

hygIRC 1-D

‰

for more information contact