Energy saving in
The air filtration field
“Life cycle cost”:
1.
Cost of filter
Generally speaking, the energy costs of a synthetic
pleated prefilter may be
seven times higher
than
the purchase cost. While a HEPA filter may be "only"
one or two times the purchase price.
2.
Energy cost during its life
3.
Costs of installation and replacement
4.
Disposal Costs
Energy consumption of filters
The energy (Watt) consumed (E) is the definite integral of
power in the time interval corresponding to the operational life
of the filter:
A fan with
inverters or with electronic adjustments, maintains a
constant flow rate at different pressure drop, with a
consumption of energy proportional, therefore, with the use of
these devices will have the possibility of
significant energy
savings
Watt = P = Q
×
Δp \ η
A reacheable energy saving with:
1.
Pre-filters
2.
Rigid Pokets filters
3.
Absolute filters
1.
Pre-filters
1.
Pre-filters
Comparative analisys with or without pre-filters
show that a rigid pockets filter
doesn’t increase
significantly
its life when combined to pre-filters.
The use of the prefilter is almost unnecessary and
involves a greater consumption of energy. In any
case we suggest to put one metallic prefilter G2 to
protect Blower and battery of exchange.
1.
Pre-filters
Pressure drop at
3400 m3/h, new (1)
after 1 month ,
2 month ,
3 month for:
Prefilter G4 CFW 40
And
Prefilter G2 metallic
1.
Pre-filters
Comparing filters
Flow rate cm/h 3.400
Flow rate cm/sec 0,9
Efficiency fan % 0,5
Type of filter CFW Average Dp 212
Working hour per day h/d 24
Operating days days 90
Annual consumption in Kwh Kwh/year 865
Flow rate cm/h 3.400 Flow rate cm/sec 0,9 Efficiency fan % 0,5 Type of filter -CFM Average Dp 85 working hour per day h/g 24 Operating days days 90
Annual consumption in Kw Kwh/yearKw/year 346,80
Power Saving Kwh/year 518,16
Cost Kwh € /Kwh 0,08
Saving in the period € € 41,45
No Co2 immision per year Kg 275,14
SIMULATION OF ENERGY SAVING AND EMISSIONS OF CO2 IN THE ATMOSPHERE
A prefilter of
592 x 592
x 48 mm at a flow rate of
3400 m³/h
has an initial pressure drop of
115 Pa
and a final, after 3 months of operation, of
about
310 Pa.
In this case if we change the
filter with e metallic filter we could save 518
kWh a
cost savings of € 41.
( cost kwh = 0,135€)
1.
Pre-filters
Via Emilia 23, 38031 Paese – Tv – Italy
Sanayl Sitesi P. Blok 10 Hosdere Mevldl Esenyurt – Istanbul - Turkey
info@generalfilter.com
39%
32%
22%
3% 2% 2% 0%
COST OF ENERGY IN AHU
Efficiency of filters F7
DUCTS
FILTERS
HEATEXCHARGED
COOLING COILS
HEATER
SILENCER
Using rigid pockets filters type
NT.-ES Energy Saving
(Efficiency class F7 - F9) with high dust holding
capacity,
instead of std rigid pockets, or economic
pockets, is possible to
save a lot of energy
and money
in the same time period .
2.
Rigid Poket filter F9
Via Emilia 23, 38031 Paese – Tv – Italy
Sanayl Sitesi P. Blok 10 Hosdere Mevldl Esenyurt – Istanbul - Turkey info@generalfilter.com
2.
Pressure drop of different rigid
pockets filters
2.
Pressure drop of different rigid
pockets filters
Please
take note
that according to the norm
EN
13053
regarding the filters with efficiency F8 and
F9 must be replaced at the achievement of 300 Pa.
MOTHS
0
2
4
6
8
10
12
NTR 9 HD
Pa
125
160
200
245
300
360
420
NTR9
Pa
125
200
280
370
465
550
-NTE9
Pa
140
250
345
450
580
720
-GENERAL FILTER TEST REPORT R.P.
Via Emilia 23, 38031 Paese – Tv – Italy
Sanayl Sitesi P. Blok 10 Hosdere Mevldl Esenyurt – Istanbul - Turkey
info@generalfilter.com
Energy cost after 8 months at 3400 m3/h
Months 10
‘Real’ energy
consumption GF
test
after 8
months
Energy cost after 8
months KWh=0,135 €
Fan
ᶯ
= 0,5%
Filter
cost
Amount
Total
NTR9-ES
1538 Kwh
207€
73
280€
NTR9 - std (18 mq)
2140 Kwh
288€
60
348€
NTE- Economic
version (14 mq)
**
2611 Kwh
352 € **
52
404€
**
The pressure drop after 10 months is not compatible so should be replaced much sooner.
Today exist absolute filters of very high
performance
:
LAM 68-
LAM 90 – LAM 115
For laminar flow or clean rooms final filters.
Class of efficiency H14
3.
Absolute filters
Via Emilia 23, 38031 Paese – Tv – Italy
Sanayl Sitesi P. Blok 10 Hosdere Mevldl Esenyurt – Istanbul - Turkey
info@generalfilter.com
Choosing to use in
new plants
, or
revamping
clean rooms if is possible to use
LAM filters of
115mm
thikness (the filtrant surface is almost
twice than the one of LAM 68 std) in case they
would be replaced according to std frequency,
is possible to
save a lot of energy.
The savings are about the twice of the
greater cost ,and almost equal to the
purchasing cost!!
Energy cost after 3 years of a model of 600 m3/h
3 Years
consumption after
Energy
3 years
Energy cost after 3
years KWh=0,135 €
Filter
cost
amount
Total
LAM68 std -H14
610x610
2122 Kwh
286€
80
366€
LAM 115 –H14-
610X610 **
1142 Kwh
154€
135
289€
** The pressure drop after 3 years is lower than the max. suggested pressure drop
.
2.
Absolute filters LAM H14
3.
Absolute filters H13
HMB 2424 (2000 m
3
/h)
NGP 2424 (4000 m
3
/h)
The energy saving
obteined from a filter type
NGP
(2000 m3/h) instead of
HMB
is higher than the
cost
of the filter.
Energy cost after 2 years 2000 m3/h
2 Years
Comsumption
after 2 years
Energy cost after 2
years KWh=0,135 €
Filter
cost
Total
amount
HBM -H13
610x610X292
7400 Kwh
1010€
140
1250€
NGP –H13-
610X610X292
3300 Kwh
446€
210
650€
2.
HMB
vs
NGP
1.
Is always better to analyse costs of energy
case by
case.
2.
Is possible to
change G4
pleated filters
with G2
metallic
filters without compromising the life of the
F8 or F9 filters.
3.
Rigid pockets heavy duty
are always
to prefer to std
rigid pockets and to the economic ones.
4.
As norm
EN13053
, final pressure drops for the filters
F8/F9
must be maximum
300Pa
. For filters
M6/F7
the
final pressure drop must be
200 Pa
.
Conclusions
5.
Absolute filters LAM
and LAM 115
allow
interesting
saving costs
. The use of
LAM 115
instead of traditional filters allow a considerable
energy saving.
6.
Is always better to
prefer absolute filters
of
high
flow rate
instead std absolute filters.
Via Emilia 23, 38031 Paese – Tv – Italy
