KIDE JOINING-SYSTEM:
TOTAL INSULATION & SAVING ENERGY
Now, you are going to see how it is possible to save: • 1000€/year with your 50m³ cold room • And 20.000€/year with your 15.000m³ cold room -----
Note: The following information is a summary of the report made by the technology research laboratory CIDEMCO in 2006. The original report is available in KIDE
ABOUT THE INSULATION
Nowadays, it is known that the polyurethane panel is more and more used due to its insulating capacity and its mechanical features: -Excellent insulation -Suits perfectly to any kind of building -Easy to assemble But what it is not so known is that the joint-system is the most important point to get a high insulation level, specially when we are talking about cold rooms.
THE JOINING-SYSTEM: The key of the insulation In this presentation, KIDE wants to show the importance of an excellent joining-system: is the best guarantee for a perfect insulation and a long-lasting cold room. The cold-rooms, mainly low temperature cold rooms, support big pressure fluctuations. Due to that, the joints are one of the most vulnerable point. To solve this problem, we can find different solutions in the market:
a) Joints sealed with materials as silicone. It is a common solution, but does not solve the problem: - The pressure fluctuations also affect to the sealing material, damaging and wearing it out. - It takes extra time and extra cost b) Inject polyurethane in the joints. This is not an efficient solution: - The density of the injected polyurethane is not the same as the density of the polyurethane inside the sandwich panel - Risk of air bags when sealing the joints with polyurethane
The KIDE joint is designed to keep its original features without any additional silicone, polyurethane‌
WHAT DOES THE EN-14509 PANEL REGULATION SAY ABOUT THE JOINING SYSTEMS? It classifies the panel into 3 groups: • A: supports a pressure higher than of 1200 Pa • B: supports a pressure of 600 Pa • C: supports a pressure of 300 Pa The regulation also requires an airtightness level, basing on the EN121114 standard: defines the air that can pass through the joint when there is a pressure diferential of 50Pa
WHICH TESTS HAVE BEEN CARRIED OUT TO PROVE THE IMPORTANCE OF THE JOINING SYSTEM? • The tests required by the European Panel regulation EN-14509 • A simulation of a real cold room, keeping frozen goods at -20ºC
1st TEST: REQUIRED BY THE EN-14509 EUROPEAN REGULATION FOR SANDWICH PANELS
RESULT: KIDE (Result on 2,4 m lenght joint)
Pa
Overpressure (m3/h) – (m3/h/m joint)
Low pressure (m3/h) – (m3/h/m joint)
50
0
0
100
0,62 - 0,26
0,65 - 0,27
150
0,87 - 0,36
0,9 - 0,38
200
1,08 - 0,45
1,14 - 0,48
250
1,33 - 0.55
1,37 - 0,57
300
1,44 - 0,6
1,54 - 0,64
450
1,94 - 0,81
2,17 - 1,17
600
2,5 - 1,04
2,8 - 1,17
RESULT: PANEL “X” (Result on 2,4m lenght joint)
This is the result of the same tests in the joint of an important competitor “Panel X”:
Pa
Overpressure (m3/h) – (m3/h/m joint)
Low pressure (m3/h) – (m3/h/m joint)
50
3,82 - 1,59
3,3 - 1,38
100
6,45 - 2,69
4,93 - 2,05
150
8,65 - 3,6
6,56 - 2,73
200
10,6 - 4,42
8,08 - 3,37
250
12,46 - 5,19
9,01 - 3,75
300
14,34 - 5,98
9,75 - 4,06
450
19,22 - 8,01
11,56 - 4,82
600
25,59 - 10,66
12,58 - 5,24
2nd TEST: SIMULATION ON A REAL COLD ROOM
For this simulation, a cold room was mounted to work at -20ยบC and it was kept under pressures up to 600Pa for 1200 hours. The simulation was carried out by well-known laboratory. 2 cold rooms were used: a KIDE cold-room and another cold room, manufactured by an important brand which does not use the same joining-system as KIDE. This test analyzed 2 parameters: - Air that goes through the joint - Temperature variation
THE RESULTS OF THE REAL OPERATION SIMULATION
The air which goes through a KIDE joint after 1200 hours working: Pressure (Pa)
Initial value (m3/h) – (m3/h/m joint)
Value after 1200 h (m3/h) – (m3/h/m joint)
50
7,02 - 1,46
9,25 - 1,93
100
13,15 - 2,74
15,13 - 3,15
150
17,38 - 3,62
20,31 - 4,23
200
21,12 - 4,4
24,91 - 5,19
250
24,98 - 5,21
26,83 - 5,59
300
28,42 - 5,92
28,77 - 5,99
450
37,02 - 7,71
34,12 - 7,11
600
41,67 - 8,68
37,51 - 7,81
The temperature difference in the joint (between the external and internal part of the cold room) is 1,4ºC after 1200 hours working, non-stop.
Joint X which was selected to be compared with the joint KIDE, could not pass 168 hours: the joint broke. The air which goes through the joint after 168 hours working is: Pressure (Pa)
Initial value (m3/h) / (m3/h/m joint)
Value after 168 h (m3/h) / (m3/h/m joint)
50
7,35 / 3,06
14,32 / 2,98
100
13,95 / 5,81
25,09
150
18,78
37,75
200
22,71
51,66
250
26,85
100,27
300
30,44
160,83
450
39,74
238,12
600
49,77
-
The temperature difference in the joint (between the external and internal part of the cold room) is 4,3ยบC in the initial phase. As the joint broke, it was not possible to meassure it after 1200 hours
IN SHORT, this is the CONCLUSION:
All joints are not the same: There are important differences and the design of the joint is the key
HOW DOES A BAD INSULATION AFFECT? When hot air or wet air goes into the cold room… • The compressor has to work more hours • Frost in the evaporator = lower cooling capacity • More frost = more defrosting needed • Less relative humidity inside the cold room: it affects to the quality of the stored goods • Condensation on the stored goods: may originate germs • Condensation on the walls, ceiling and floor
When the cooled air goes out of the cold room through the joints… • Condensation on the walls, ceiling and floor. Risk of shortcircuits and slippery floor • Condensation on the joints: the panel losts its insulating capacity and mechanical characteristics. The adherence between the polyurethane nucleus and the covering sheet is worst
A BAD INSULATION IN € The economic valuation of a bad insulation depends on the use of the cold room and other uncontrollable paramethers. But, we know that due to a bad insulation there is an extra air intake which has to be cooled. We can make an economic calculation of the additional cost which is caused by the treatment of this “extra-air” and draw the conclusions about the importance of the joining-system.
The economic calculation is made this way: • Inside cold room: -20ºC / 90% • Outside cold room: 30ºC / 65% In this situation, the air entalphy difference is : 93,42 Kj/Kgas And, as we know: • 1Kj = 0,00028 Kwh • 1Kwh costs 0,09 € • 1 m3as = 1,2 Kgas Then, for each extra m³ of air which goes into the cold room through the joints, the cost is:
0,00282 €
THIS MEANS THAT… • A customer who has a 50m³ KIDE cold room: saves 1.000 €/year • And with the 15.000m³ KIDE cold room: saves 20.000 €/year
Save ENERGY = Save MONEY