4 advantage of applying vacuum glass in refrigerators
Refrigeration display cabinets, as a necessary refrigeration tool in supermarkets,As the energy consumption of refrigerators account 70% of supermarket total energy cost,so it’s necessary to find solutions to decrease refrigerator energy consumption.
Traditional refrigerators use double glass units with warm edge spacer with low-E coatings.Typical structure are 4 LE +12AR+4C.
- Low-E coating:Decrease the thermal conductivity and heat loss.
- Warm edge spacer:Decrease the glass edge thermal conductivity and prevent condensation.
- Anti-condensation films are always used to prevent condensation.
The refrigerators has high requirement on glass,the glass must has high light transmittance and visual effect,low U value to prevent the heat transmitted the glass ,and also low condensation possibility,meanwhile glass must be light to decrease the frame materials and save costs.
Applying vacuum glass in refrigerators can meet all these requirement and save much costs.
1.Vacuum glass can help refrigerators free from condensation.
Scientists in Synergy Glass conducts the test and got conclusion below:
Cabinet temperature -20℃,environment temperature are 25℃,30℃,35℃ separately,when condensation appears on vacuum glass(U value 0.4-0.6W/M2.K) ,the humidity is 79%-88%,for low-E IGU (U value 1.1-1.2W/M2.K),humidity is 62-68%,while for normal triple glass units (U value 2.0w/m2.k),humidity is 45-50%.
Vacuum glass has great advantage in preventing condensation ,for other insulated glass,refrigerator manufacturers must apply heating film to increase glass surface temperature and prevent condensation.
2.Vacuum glass can help saving refrigerator energy costs.
Early this week we made a simple test showing the excellent thermal insulation performance of vacuum glass.
Based on same condition,the test result is:
|U value||Inner Temperature||Outer temperature|
Based on same condition,compared with insulated glass,the surface temperature of vacuum glass is 8.5℃ lower than insulated glass.
The VIG can not only prevent the heat transmit glass,but also block the cold air inside the refrigerators transmit glass.
Synergy articles calculated the energy costs of different combination insulated glass in refrigerators and below conclusion:
|Glass Type||Glass Combination||Glass U value||Power consumption||Annual power costs|
Remark:Indoor temperature -20℃，outdoor temperature 30℃，Cooling coefficient 3.4，glass door area 1sqm,heat film nominal power 100W,power costs USD0.16/Kwh.
3.Vacuum glass can prolong refrigerator lifetime.
As vacuum glass can keep low temperature and prevent the cold air transmit glass,then will decrease the condenser working time and its frequent starting, prolong its lifetime.
4.Vacuum glass can decrease refrigerator costs.
Even though vacuum glass price is 3-5 times that of normal insulated glass,but refrigerator manufacturers can decrease costs through optimizing the refrigerator structure.
- Vacuum glass used in refrigerators are usually 4+0.3+4mm,which is only 1/3 that of insulated glass,weight is also much lighter, manufacturers can decrease the matched door frame.
- As condenser working time is decreased much,so manufacturers can use much smaller condenser to decrease overall costs.
- Heating film is not necessary when VIG is applied,the door structure can be simplified.
HaanGlas vacuum glass U value now is 0.47W/M2.K ,minimum thickness 6.3mm,which can not only replace the traditional insulated glass,but also help simplify the refrigerator door structure and overall decreased costs in its lifetime.Contact us if you’re interested in applying our fantastic VIG in your high end refrigerators,and let’s build a low carbon world.
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