Presentation of Econet - innovative heat exchanging solution by Flakt Woods.

1. ECONET
© Fläkt Woods 1

2. High Efficient Energy recovery systems
Fläkt Woods is a world leader in energy recovery systems for air
handling units. The most popular systems are:
Run around coils solutions, ECONET or Ecoterm
 No risk of odour and bacteria transfer
 Free to separate the supply air unit from the exhaust air unit
Rotary heat exchanger
 Good heat recovery efficiency
 Risk of odour and bacteria transfer
Plate heat exchanger
 Simple solution
 Moderate heat recovery
 Small risk of odour and bacteria transfer
© Fläkt Woods 2

3. ECONET® The new heat/cooling recovery system
The traditional way
The ECONET way
Unique for ‘runECONETcoils’
Unique for the around way
1 component, 4 functions
 Flexible installation and performance
 Noleakage between the supply and return air
lower pressure drops,shorter AHU
Increased heat recovery efficiency 60…75% performance
(no odour and bacteria transfer)
Able to use coolingfor corrossive and polluted air
 Can also be used recovery
Allways prepared for cooling and cooling recovery
Possibility to utilize process/waste heat
Perfect for district cooling/heating
© Fläkt Woods 3

4. ECONET® References, hygienical application
Hospital/pharma applications more than 200 (totally > 950) systems sold.
ECONET®
Janssen Pharmacia: Antwerpen - Belgium
ECONET® ECONET®
Lindisbergs lasarett: Lindisberg - Sweden ECONET®
Linköping: Linköping - Sweden ECONET®
ECONET®
ECONET®
Jyväskylän keskussairaala: Jyväskylä - Finland
ECONET® ECONET®
Central hospital: Karlstad - Sweden
ECONET®
Hospital Raahe: Raahe - Finland ECONET ®
ECONET® ECONET®
ECONET®
University hospital: Stavanger - Norway
ECONET® ECONET®
Turku hospital TYKS: Turku - Finland
Odense hospital: Odense - Denmark
Hospital St Olav: Trondheim - Norway
ECONET®
Raisio hospital: Raisio - Finland
Brönnöysund hospital: Brönnöy - Norway
Seinäjoki hospital, Seinäjoki - Finland
© Fläkt Woods 4

5. ECONET® Benefits (investment)
 ECONET reduces the investment costs
 Reduces the size of the chiller
 Reduced cold water flows, pipe work dimensions
 Reduces the size of the boiler
 Reduced hot water flows, pipe work dimensions
 Can utilize cheap waste heat
 Reduced energy costs
 Better energy recovery
 Possibility to use waste heat
 Smaller foot-print
 1 component instead of 3 components in the supply air unit
 Shorter installation time
 Pre-fabricated pump unit with pre-programmed control box.
© Fläkt Woods 5

6. ECONET® Benefits (impact of heating and cooling network)
Berlin: No recovery Ecoterm ECONET®
8,8 m³/s, 31 680 m³/h,
winter -12°C -> 20 °C
summer 32°C -> 16 °C
AHU size EU-53
Cooling
Chiller size 238 kW 238 kW 167/120 kW
Cold water flow 9,4 l/s 9,4 l/s 2,6 l/s
Heating
Boiler size 338 kW 149 kW 99 kW….0 kW
Hot water flow 4,0 l/s 1,8 l/s 0,6 l/s
© Fläkt Woods 6

7. ECONET® Case cooling
Reduction of cooling power by utilizing cooling recovery and IEC
(95 kW) The exhaust air
28°C 18°C
19°C 24°C
24°C
238 kW
22ºC
(120 kW)
11°C
32°C 16°C
The supply air
44% of the cooling power needed taken from cooling recovery
© Fläkt Woods 7

8. ECONET® Example, Westend First Frankfurt
50% of the cooling power needed taken from cooling recovery
© Fläkt Woods 8

9. ECONET® Case cooling
Reduction of cooling power by utilizing cooling recovery
(50 kW) The exhaust air
29°C 18°C
24°C 24°C
26ºC
(167 kW)
11°C
32°C 16°C
The supply air
23% of the cooling power needed taken from cooling recovery
© Fläkt Woods 9

10. ECONET® Case cooling, impact of chiller and pipework
ECONET combined with a chiller
Cooling recovery + IEC 120 kW, 9/15°C, 4,8 l/s 9/20°C, 2,6 l/s
Or or
Cooling recovery 167 kW, 9/15°C, 6,6 l/s
9/24°C, 2,6 l/s
•Reduced size of chiller
•Reduced size of pipe work
•Reduced liquid flow
•A higher evaporating temperature in the chiller gives us a smaller and a
more efficient chiller
The traditional way
238 kW, 6/12°C, 9,4 l/s
© Fläkt Woods 10

11. ECONET® Case cooling, impact of chiller
Chiller size
Reduction of the chiller:
100.00 %
90.00 %
80.00 %
By 30%, utilizing cooling
70.00 %
recovery 60.00 %
100 % 100 %
50.00 %
40.00 % 70 %
By 50 %, utilizing cooling 30.00 % 50 %
recovery combined with IEC 20.00 %
10.00 %
0.00 %
No recovery Traditional energy recovery ECONET ECONET utilizing waste heat
or/and IEC
Reduction of the chiller size
Berlin:
8,8 m³/s, 31 680 m³/h, CAV, 8760 h/year, summer 32°C -> 16 °C,
size EU-53, 100% => 238 kW (chiller)
© Fläkt Woods 11

12. ECONET® Case cooling, impact of pipe work
Cold water flow
Reduction of the cold 100.00 %
water flow: 90.00 %
80.00 %
70.00 %
By approx. 70% by using 60.00 %
100 % 100 %
ECONET 50.00 %
40.00 %
30.00 %
20.00 %
28 % 28 %
10.00 %
0.00 %
No recovery Traditional energy ECONET ECONET utilizing
recovery w aste heat or/and IEC
Reduction of cold water flow inside the building
Berlin:
8,8 m³/s, 31 680 m³/h, CAV, 8760 h/year, size EU-53,
100% => 9,4 l/s(cold water flow)
© Fläkt Woods 12

13. ECONET® Benefits (investment)
 ECONET reduces the investment costs
 Reduces the size of the chiller
 Reduced cold water flows, pipe work dimensions
 Reduces the size of the boiler
 Reduced hot water flows, pipe work dimensions
 Can utilize cheap waste heat
 Reduced energy costs
 Better energy recovery
 Possibility to use waste heat
 Smaller foot-print
 1 component instead of 3 components in the supply air unit
 Shorter installation time
 Pre-fabricated pump unit with pre-programmed control box.
© Fläkt Woods 13

14. ECONET® Benefits (impact of heating and cooling network)
Berlin: No recovery Ecoterm ECONET®
8,8 m³/s, 31 680 m³/h,
winter -12°C -> 20 °C
summer 32°C -> 16 °C
AHU size EU-53
Cooling
Chiller size 238 kW 238 kW 167/120 kW
Cold water flow 9,4 l/s 9,4 l/s 2,6 l/s
Heating
Boiler size 338 kW 149 kW 99 kW….0 kW
Hot water flow 4,0 l/s 1,8 l/s 0,6 l/s
© Fläkt Woods 14

15. ECONET® Case heating
Reduction of heating power by utilizing superior heat recovery
(239 kW)
The exhaust air
+23°C
18°C (99 kW)
149 kW
27°C
-12°C +20°C
The supply air
75% of the heating power needed taken from heat recovery
© Fläkt Woods 15

16. ECONET® Case heating, impact of boiler size
Boiler size
Reduction of the boiler:
100.00 %
90.00 %
By 71%, by using ECONET 80.00 %
instead of no heat recovery at all 70.00 %
60.00 %
100 %
50.00 %
By 40 %, by using ECONET 40.00 %
instead of traditional heat 30.00 %
44 %
recovery 20.00 % 29 %
10.00 %
By 100%, by using ECONET 0%
0.00 % No recovery Traditional energy recovery ECONET ECONET utilizing waste heat
combined with ‘waste heat’ or/and IEC
Reduction of the the boiler size
Berlin:
8,8 m³/s, 31 680 m³/h, CAV, 8760 h/year, winter -12°C -> 20 °C,
size EU-53, 100% => 338 kW (boiler)
© Fläkt Woods 16

17. ECONET® Case heating, impact of pipe work
Hot water flow
Reduction of the hot
100.00 %
water flow:
90.00 %
80.00 %
By 85%, by using ECONET 70.00 %
instead of no heat recovery at all 60.00 %
100 %
50.00 %
40.00 %
By 76 %, by using ECONET 30.00 %
44 %
instead of traditional heat 20.00 %
recovery 10.00 % 15 %
0.00 %
No recovery Traditional energy recovery ECONET
Reduction of hot water flow inside the building
Berlin:
8,8 m³/s, 31 680 m³/h, CAV, 8760 h/year, winter -12°C -> 20 °C,
size EU-53, 100% => 4 l/s (60/40°C, hot water flow)
© Fläkt Woods 17

18. ECONET® Benefits (LCC, investment/running costs)
 ECONET reduces the investment costs
 Reduces the size of the chiller
 Reduced cold water flows, pipe work dimensions
 Reduces the size of the boiler
 Reduced hot water flows, pipe work dimensions
 Can utilize cheap waste heat
 Reduced energy costs
 Better energy recovery
 Possibility to use waste heat
 Smaller foot-print
 1 component instead of 3 components in the supply air unit
 Shorter installation time
 Pre-fabricated pump unit with pre-programmed control box.
© Fläkt Woods 18

19. ECONET® Benefits (impact of running costs)
EU-53 (8,8 m³/s, 31 680m³/h)
No recovery Ecoterm ECONET®
Running time: 24 hour/day, 365 d/y,
CAV system
Duration curve: Berlin
Supply air temperature: 20°C…16°C
Exhaust air temperature: 22°C…24°C
Efficiency variants for the
coils ECONET
Ecoterm 5/supply air
coil 2/supply air coil 3/exhaust air
coil 3/exhaust air
Heating energy 769 MWh 211 MWh 136 MWh
Cooling energy 155 MWh 155 MWh 129 MWh
© Fläkt Woods 19

20. ECONET® Cas e he ating , impact of e ne rg y
cons umption
Heating
Reduction of the heating 100.00 %
energy: 90.00 %
80.00 %
70.00 %
By 72%, by using ECONET
instead of no heat recovery at all 60.00 %
100 %
50.00 %
40.00 %
By 36 %, by using ECONET 30.00 %
instead of traditional heat 20.00 % 27 %
recovery 10.00 % 18 %
0%
0.00 %
Reduction of 100% of primary No recovery Traditional heat recovery ECONETFWG energy ECONET utilizing w aste heat
recovery or/and IEC
energy, by using ECONET Primary heating energy
combined with ‘waste heat’
Berlin:
8,8 m³/s, 31 680 m³/h, CAV, 8760 h/year, size EU-53,
100% => 769 MWh/year
© Fläkt Woods 20

21. ECONET® Cas e he ating , impact of e ne rg y
cons umption
Cooling
Reduction of the cooling
100.00 %
energy: 90.00 %
80.00 %
70.00 %
By 17%, utilizing cooling 60.00 %
recovery combined with IEC 50.00 % 100 % 100 % 100 %
83 %
40.00 %
30.00 %
20.00 %
10.00 %
The warmer the climate is the
0.00 %
more You save in cooling No recovery Traditional heat
recovery
ECONETFWG energy
recovery
ECONET utilizing waste
heat or/and IEC
energy consumption
Primary cooling energy
Berlin:
8,8 m³/s, 31 680 m³/h, CAV, 8760 h/year, size EU-53,
100% => 155 MWh/year
© Fläkt Woods 21

22. ECONET® Benefits (Space requirements for AHU)
 ECONET reduces the investment costs
 Reduces the size of the chiller
 Reduced cold water flows, pipe work dimensions
 Reduces the size of the boiler
 Reduced hot water flows, pipe work dimensions
 Can utilize cheap waste heat
 Reduced energy costs
 Better energy recovery
 Possibility to use waste heat
 Smaller foot-print
 1 component instead of 3 components in
the supply air unit
 Shorter installation time
 Pre-fabricated pump unit with pre-programmed control box.
© Fläkt Woods 22

23. ECONET® Case space in the equipment room
Reduction of the AHU length:
By 1,2 meter
Reduction of the AHU foot-print:
By 3,1 m²
Reduction of the AHU weight:
By 418 kg (3288/3706 kg)
…+1204 mm
© Fläkt Woods 23

24. ECONET® Applications
 Hospital, Pharma (offices)
No odour,bacteria, virus transfer
Easy to use cooling recovery
High heat recovery ratio, 60-75%
Perfect for VAV system
Utilization of waste heat (condensate heat from chillers)
Smaller foot-print for AHU
 Supermarkets, shopping centres
Utilization of waste heat (condensate heat from chillers)
Easy to use cooling recovery
High heat recovery ratio, 60-75%
Perfect for VAV system
Smaller foot print for AHU
 Industry
Utilization of waste heat (process heat)
High heat recovery ratio, 60-75%
Can be used with corrosive and polluted exhaust air
© Fläkt Woods 24

25. ECONET® Summary
 Up to 85-90% of the costs for the customer during the life time of the system are
related to the running costs.
Energy 85%
Investment 10%
Maintenance 5%
 Something to think about during 20 years!
© Fläkt Woods 25