Dwelling Energy Measurement Procedure (DEMP)

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Nov 21, 2013 (3 years and 8 months ago)

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Conclusion

This

study

involves

the

development

of

a

procedure

to

measure

the

actual

energy

performance

of

a

building
:

the

Dwelling

Energy

Measurement

Procedure

(DEMP
.
)

The

procedure

utilises

the

latest

in

wireless

sensor

technology

and

is

architected

so

that

any

dwelling

type

can

be

measured
.


The

procedure

should

yield

more

accurate

results

than

the

current

paper

based

assessment

procedure

by

incorporating

a

greater

range

of

parameters

i n c l u d i n g

as
-
built

workmanship

and

maintenance

levels
.

In

addition,

the

procedure

can

inform

the

owner/occupier

of

the

thermal

characteristics

of

the

building

at

key

locations
.

Finally,

the

study

shows

Zigbee

IEEE

802
.
15
.
4

to

be

a

reliable

platform

upon

which

to

base

the

procedure

in

terms

of

stability,

flexibility

and

scalability
.



Aim

To

develop

a

method

to

measure

the

actual

energy

performance

of

a

dwelling

and

generate

a

figure

of

merit

that

equates

to

the

BER
.


To

implement

and

test

Zigbee

wireless

sensor

networks

in

a

domestic

environment

and

determine

the

optimum

network

architecture
.


To

develop

method

that

facilitate

the

measurement,

storage

and

analysis

of

data

from

around

the

building

and

surrounding

environment
.


To

rate

the

thermal

conditions

at

key

locations

within

the

building
.



Abstract


Abstract



This

study

presents

a

building

energy

measurement

procedure

utilising

wireless

sensor

networks
.

It

is

presented

as

an

alternative

to

the

Dwelling

Energy

Assessment

Procedure

(DEAP)

as

it

yields

the

actual

energy

performance

of

the

building

taking

into

account

not

only

the

design

and

materials

used

but

the

standards

of

workmanship

and

maintenance

applied
.


Introduction


In

this

study,

it

has

been

identified

that

there

is

a

wealth

of

inefficient

existing

buildings

with

regard

to

energy

performance
.

The

dwelling

energy

assessment

procedure

(DEAP)

is

the

only

legislative

method

of

assessing

t h e

e n e r g y

p e r f o r m a n c e

of

a

residential

building

in

Ireland
.


However,

it

is

recognised

that

the

accuracy

of

the

procedure

is

limited
.

It

does

not

take

into

account

the

actual

conditions

of

the

building

being

assessed
:

considering

only

the

design

criteria
.


Recent

advances

in

wireless

sensor

networks

enable

the

development

of

procedures

that

measure

the

energy

performance

of

a

building
.

Such

measurements

incorporate

not

only

the

design

criteria

but

also

parameters

such

as

the

standards

of

materials

used,

workmanship

applied

and

maintenance

records
.

The

procedure

developed

and

tested

in

this

study

measures

the

actual

energy

performance

and

provides

a

building

energy

audit

of

the

dwelling

through

the

utilisation

of

Zigbee

wireless

sensor

networks
.


The

Dwelling

Energy

Measurement

Procedure

(DEMP)

provides

feedback

to

the

occupant

as

to

how

the

building

is

performing

so

they

can

make

informative

decisions
.

The

end

result

is

a

method

which

measures

building

energy

performance

by

incorporating

an

autonomous

wireless

sensor

network

and

a

high

level

of

human

interaction

to

produce

a

more

sustainable

dwelling
.



.

Method


A

number

of

different

residential

buildings

were

identified

as

case

studies

for

the

investigation
.

B u i l d i n g s

w e r e

s e l e c t e d

b a s e d

on

variations

in

design

and

as
-
build

criteria
.


A

Zigbee

network

has

been

placed

in

each

building

and

a

range

of

architectural

layouts

are

being

tested
.


A

number

of

sensors

have

been

positioned

inside

and

outside

the

building
:

each

measuring

its

local

thermal

conditions

and

periodically

reporting

the

data

back

to

a

central

hub

for

storage

and

analysis
.


We

are

currently

implementing

a

wide

range

of

experiments

under

controlled

conditions
.

The

r esul t s

ar e

bei ng

anal ysed

to

determine

the

actual

performance

of

the

building

and

to

determine

useful

metrics

for

a

figure

of

merit
.



Zigbee

Dwelling Energy Measurement Procedure (DEMP)

Brendan E. Hoare and Dr. Colm V. Cryan

Civil Engineering and Material Science Department

University of Limerick


Fig .2. Zigbee Mesh Topology used throughout the study
.

Fig .1. Information flow Schematic. Illustrating the
Dwelling Energy Measurement Procedure


( DEMP)Process

Fig 3. Temperature vs. Time Graph 1.

Fig 4. Temperature vs. Time Graph 2.

Acknowledgements

I

wish

to

acknowledge

Dr
.

Colm

V
.
Cryan,

and

the

Civil

Engineering

and

Material

Science

Department

for

there

support

throughout

this

study
.



Zigbee

(IEEE

802
.
15
.
4
)

is

an

emerging

wireless

technology

standard,

developed

by

the

Zigbee

Alliance
.

The

standard

is

designed

to

provide

low
-
cost,

low

power,

personal

area

networks
.

The

standard

can

support

up

to

65
,
000

nodes

operating

at

up

to

250

kbps
.

In

this

study

star

and

mesh

network

topologies

are

being

explored

and

the

network

characteristics

and

capabilities

of

each

configuration

is

being

determined
.


The

figures

presented

show

preliminary

results

f r o m

i m p l e m e n t a t i o n

of

the

Dwelling

Energy

Measurement

Procedure

(DEMP
.
)

The

results

show

that

using

currently

available

technology,

it

is

possible

to

identify

areas

within

a

building

with

different

thermal

responses
.

We

are

currently

working

to

correlate

the

measured

data

with

the

parameters

influencing

performance

such

as
;


Floor

area



Building

Orientation


Surface

Area


Ventillation


Volume


Glazed

Area


Heating

System

(radiator

area)

The

next

step

is

to

establish

the

figure

of

merit
.

Results

Results