Ulf Hörman - Swegon Air Academy

Transcription

Energy is in the air!
1
Protection from the climate!
Why ventilate?
remove polluted air
remove surplus heat
3
Green
energy
Environment
Energy
performance
Energy
Ecological
4
…but what is it all about?
5
•
Are we running out of energy supply?
•
How are we effecting the environment?
•
Can we afford increased energy prices?
EPBD
• Energy saving potential 22% until 2010
• Payback time <8 year.
• Building construction, heating, ventilation,
cooling, lightning
31%
Transport
28%
Industry
•New buildings, and bigger renovations.
41%
Buildings
Swedish government, EPBD
Energy use
2019
ZEB – Zero Energy Buildings
2009
7
2020
2050
The technical climates
•
8
Air quality
•
Visual environment
•
Thermal climate
•
Acoustic environment
CAV
Constant air Volume
VAV
Variable Air Volume
DCV
Demand Controlled Ventilation
9
Air volume depending on ocupancy - CAV with manual controlled air boost when needed
400
12
Number of people
m3/h
Average: 370 m /h
Average: 103
8
300
m3/h
250
200
6
150
4
100
2
Air volume (m3/h)
350
10
50
0
0
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Time
Air volume depending on level of ocupancy -demand contolled ventilation
12
400
Number of people
300
Average: 58 m3/h
8
250
6
200
150
4
100
2
50
0
0
24
1
2
3
4
5
6
7
8
9
10
11
12
Time
10
13
14
15
16
17
18
19
20
21
22
23
24
Air volume (m3/h)
350
10
What creates the conditions?
High comfort + good air quality = high energy use
High comfort + good air quality
= low energy use
Occupancy level
The presence, or rather absence gives
conditions for DCV
11
Where is the energy saved?
• Less electricity to the fans
• Less heating energy required for preheating of supply air
• Lower supply air temperature
• Lower demands when absence in room
12
Function
School CAV
Good air quality
High energy use
Designed airflow 100%, Used airflow 100%
Function
School DCV
Swegon e.r.i.c
TM
Good air quality
Low energy use
Designed airflow 80%, Used airflow 50%
Actual measurements
15
Schools Classroom
Obbola
Swegon,
Johansson,
sumbmitted
2010
Airflow in 1
classroom, 6 weeks
Schools Classroom
Tomelilla
Swegon,
Johansson,
submitted
2010
CO2 in 11 class
rooms, 3 weeks
Schools Classrooms
Schools Classrooms
Karls-krona,
Sweden
Oslo,
Norway
Estimations,
2008
Mysen et al.,
2005
p
M..F, 8..18:14%; All time:
4%; Occ at any presence:
26%, Ratio of time M..F
8..18 with any presence:
46%
M..F, 8..18:19%; All time:
6%; Occ at any presence:
50%
M..F, 8..18:30%
Visual checks in 175 M..F, 8..18:30%; All time:
class rooms during 9%; Occ at any presence:
one day in each
40%
Winter, only
1 classroom,
7 to 9th
grade
Winter, 7 to
9th grade
Energy savings in schools
Average heat usage in Sweden
143 kWh/m2 year
Target value for new schools
70 kWh/m2 year
With DCV system and pressure control
~60 kWh/m2 year
Total school area in Sweden
30,8 million m2
Energy cost
0,06 € / kWh
Lets assume we can reduce the average to 100 kWh/m2 year
16
Total saving potential in Sweden / year
79 million € / year
Reduced emissions / year
Annual energy use
Teachers
15 000 ton CO2 / year
260 000 Household
1600 persons
Ängdala school – energy calculation
17
•Project:
School,
South of Sweden
•Designed:
2005
•Built:
2006
•Area:
3300
•Total airflow:
10,1 m³/s
•System
CAV, VAV
m²
CAV, VAV
•Type of room
System
Control
•Class room
CAV
17%
•Group room
CAV
7,8%
•Personal
VAV
•Conference room
VAV
•Kitchen, dining
CAV*
42%
•Café
CAV
2,8%
•Media area
VAV
•Office
CAV
•Gym hall
VAV
•Dressing room
CAV
4,9%
•Other space
CAV
2,0%
°C, CO2
1,5%
°C, CO2
1,8%
°C, CO2
2,5%
3,9%
°C, CO2
•* Only between 10-14, other hours, hygiene airflow
18
Part of airflow
14%
100%
Occupancy Ängdala school between 07.00 –
18.00 according to class room schedule
100%
90%
80%
Designed
856
70%
Actual
220
60%
Percentage
26%
50%
40%
35%
31%
32%
59%
32%
30%
20%
6%
10%
0%
Klassrum
class
room
19
grupprum
group
room
Hemkunskap
Cooking
Musik
Music
Slöjd
Woodwork
Gymnastik
Gymnastics
Swegon System Choice
20
Usage / year – heating and electricity
•Energy calculation for designed solution
•Heat
Electricity
Total:
Saving / year
70 kWh/m2year
64 kWh/m2year
134 kWh/m2year
•Energy calculation, DCV, 16° supply air temp.
•Heat
Electricity
Total:
57 kWh/m2year
54 kWh/m2year
111 kWh/m2year
5000 €/year
67 kWh/m2year
37 kWh/m2year
103 kWh/m2year
8500 €/year
•Energy calculation, DCV, 16°, Light control
•Heat
Electricity
Total:
21
Saving potential
Swegon System Choice energy calculations.
Ängdala
Ängdala
Ängdala
Not:
Graddagskorr.
Inkl. verks.el
Built
Ventilation system
Area (Atemp)
Heat (kWh)
Electricity (kWh)
Graddagskorr.
Heat (kWh/m2)
2007
2
Electricity (kWh/m )
Total
Cost /kWh (SEK)
Värme
0,61
El
0,96
Inkl. verks.el
Energy cost/year SEK
22
Ängdala school
2006
CAV/VAV 18° CAV/VAV 18°
4400
4400
530000
SSC
443167
SSC
DCV 16°
4400
SSC
SSC
DCV 16° Bel.
4400 m2
SSC kWh
SSC kWh
120
117
69
77 kWh/m2
101
221
81
198
50
120
42 kWh/m2
120 kWh/m2
73 kr
97 kr
170 kr
71 kr
78 kr
149 kr
42 kr
48 kr
90 kr
748 000 kr
656 018 kr
91 982 kr
397 892 kr
258 126 kr
47 kr
41 kr
88 kr SEK/m2
385 726 kr
270 292 kr Saving potential / year
WISE - Demand Controlled Ventilation
23
Room Products
24
Zone Products
25
26
System WISE – controlled by what is needed
27
Room Products
• ADAPT Sphere and ADAPT
Free
–Terminals with adjustable slot
• ADAPT Colibri and ADAPT
Exhaust
–Terminals with adjustable damper
in the commissioning box
Controlled by flow – pressure independent!
28
Room Products
Built-in intelligence
29
–
Controller
–
Pressure sensor
–
Temperature sensor and
presence sensor
–
Control of heating in sequence
–
Lightning control
–
Quick-fit connectors
Integrated control functions
Examples office – cooling demand gives max air volume
Air Quality
- Absence - minimum flow (5 l/s)
- Presence - Presence Flow (10 l/s)
(20-25 ° C)
(21-23 ° C)
comfort
- Presence demand controlled (10-50 l/s)
21-23 ° C)
Flow measurement
Flow Control
Temperature
presence
30
System WISE – easy and functional
31
Room Products
ADAPT Damper has built-in
intelligence
32
–
Controller
–
Pressure sensor
–
Temperature sensor
–
Control of heating in sequence
–
Lightning control
–
Quick-fit connectors
–
Clean Air Control
School WISE
33
Zone Products
34
Zone Products
• CONTROL Damper
– Keeps the pressure constant
in the zone
– Pressure control, flow control
• DETECT Pressure
• SLAVE Control
• TUNE Control
– Wireless hand device
35
What is a zone?
•A zone is a part of a system, it can vary
from being several zones from a shaft /
floor level …
•…to that the unit functions as a zone
damper. In decentralised ventilation
(many smaller air handling units instead
of one large one) you can in most cases
consider each system to be one zone in
your calculation.
36
37
GOLD AHU
• Plug n’ Play with Super WISE
• Pressure controlled flow
• Constant supply air
temperature
• Outdoor air temperature
compensation
• Summer night cooling
• X-Zone
38
Super WISE – main functions
Super WISE is a communication
device that talks via Modbus RTU
to Swegon AHU GOLD and with all
Swegon underlying products
included in the WISE system
Super WISE has three main functions:
39
•
Pressure Optimization of AHU
•
Gateway towards BMS
•
Web page for supervising the
system
Pressure optimisation of the AHU
•Super WISE knows each zone damper
position and optimize the AHU pressure so
that at least always one zone damper is fully
open.
•This reduces energy use for the unit with up
to 25% and contributes to a more quite
system.
40
Gateway towards external BMS
A ventilation system designed to
Super WISE handles the protocols
communicate with Super WISE needs Modbus RTU, Modbus TCP and BACnet
to be connected and addressed
TCP
(Modbus ID) according to Swegon
instructions.
Then all products included, will
automatically be presented in Super
WISE in a logical tree structure.
The structure is also reflected as a
"flat" structure for the external BMS
company to communicate with.
41
Web page for supervising the system
Super WISE also includes a web
page that presents the complete
underlying ventilation system in a
concise and easy and understandable
way.
Zone and room images is presenting
read and writable values (set points)
Editable parameters for each room
and zone products are easily
accessible in the web structure .
42
Why demand controlled ventilation?
Energy performance directive, energy declaration of buildings
EPBD
LEED
BREEAM
BBR (Swedish directive)
Saving energy
Saving the environment
Saving money
Without compromising on
indoor climate and air quality
43
Arguments for Demand controlled ventilation
 Rules and Regulations
 Less electricity to fans
 Less thermal energy to heat the outdoor air
 Lower supply air temperature
 Lower climate demands when absence
 Free cooling
 Smaller AHU (simultaneity factor)
 Less environmental impact
 Individual room control
 Flexibility
 The future!
44
So,don't forget to
switch off the
ventilation!
45

Ulf Hörman - Swegon Air Academy

Transcription

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