Application of LiSEC's Air-floating Tempering Furnace and Vacuum-Lisec

Application of LiSEC s air cushion tempering furnace and vacuum lamination technology in PV glass and module Michael Wang / LiSEC China Program 1. Tempering heating process control 2. Anti-infiltration edge seal 3. Vacuum lamination technology 4. Product advantages and applications 1 1. Tempering heating process control 2. Anti-infiltration edge sealing 3. Vacuum lamination technology 4. Product advantages and applications Heating method: conduction, radiation, convection The difference between the two：  Replacement of ceramic roller conveyors with air-cushion transmissions - no ceramic roller waves, no need for sulphur dioxide  No contact on the glass surface - processing double silver or glaze  The most complete convection circulation system - the fastest coating glass tempering  Balance between super convection system and energy consumption - excellent flatness  No ceramic wear parts Tempering heating process control comparison LiSEC s air-cushion tempering furnace Traditional roller tempering furnace Air Cushion Tempering Air Cushion Tempering Process Circulating air cushion tempering process control：  40% energy savings compared to traditional convection systems  Continuously tempering different types of glass without waiting  Tempering 2mm glass， in line with European standard EN12150  Unrestricted thin sheet glass production capacity  Perfect laminating quality due to excellent tempered glass flatness  Easy to realize the whole factory automation production line connection Air Cushion Tempering Air Cushion Tempering Process Tempering heating process control Compression test Thin sheet glass advantages 2mm Tempered glass VS 4mm Non-tempered glass Glass flatness – Roller Furnace Random Examples Measured with Ospray (Glass quality measurement tool) Glass Flatness – AEROLFAT Detail – Glas Quality HAL-50/17-313 Batch Glass thickness : 2 – 8 mm Different glass sizes and types can be tempered Biggest size : 196” x 66” (5000 x 1700 mm) 2 mm: 40 furnace/h 2150 foot²/h (200 m²/h)* 3 mm: 30 furnace/h 1615 foot²/h (150 m²/h) Energy consumption : 2mm Semi-tempering = 2,15 kWh/m² 3mm Full tempering = 3,66 kWh/m² (According to. 53foot² 5m²/furnace) Air cushion tempering furnace Equipment type Aeroflat 12-614 Continuous Glass thickness : 2 – 4 mm (6 mm) Continuous production (same glass and type) Biggest size 94” x 47” (2400 x 1200 mm) 2 mm: 250 mm/min 9 sec./sheet 680 m²/h* 3 mm: 166 mm/min 13 sec./sheet 470 m²/h** (* Sample size 1700 x 1000 mm Semi-tempering) (** Full tempering ) Air cushion tempering furnace Equipment type Air cushion continuous tempering Aeroflat 12-714 FT2 2 1. Tempering heating process control 2. Anti-infiltration edge sealing 3. Vacuum lamination technology 4. Product advantages and applications Edge Sealing VHA Butyl coater for fully automatic edge sealing VHA-35/20 Edge Sealing – Reactive Butyl Anti-infiltration-edge sealing Water vapor permeability  PVB Spacer film encapsulating ~ 50 g/m²day  EVA Spacer film encapsulating ~ 30 g/m²day  Tectosil / Silicon Spacer film encapsulating ~7 g/m²day  PVS 101 edge sealing 0.01 g/m²day Due to the addition of edge seals, PV modules are 700 times more resistant to water penetration than the best spacer film encupasulating module. 。 At the same time, the cell and functional film are best protected in a humid environment. Thermal Tempered Thin Glass Neutral Bending Phase Advantages of ultra-thin glass in PV module  Greater flexibility  All-glass encapsulated, no effect on cell when bending  Tight anti-penetration edge seal Thermal Tempered Thin Glass Neutral Bending Phase / EL-Test 3 1. Tempering heating process control 2. Anti-infiltration edge sealing 3. Vacuum lamination technology 4. Product advantages and applications Vacuum lamination technology Process description  pressure of vacuum chamber pumping to 1mbar 120 seconds  Preheating time 60 seconds Electric heated metal plate (e.g. 110°C for PVB interlayers) Lift the module from the transfer wheel and heat it quickly  Laminating time 5 seconds The module was laminated to a gap of about 1 mm by two heated metal plates so that edge sealed two glasses. A gap of about 1 mm between the two sheets of glass ensures that the cell is not crushed.  Deflate to atmospheric pressure 45 seconds No mechanical external force, internal vacuum of the module and external atmospheric pressure, so that the two pieces of glass are naturally pressed to the final thickness. Total~ 4 minutes before Vacuum Lamination Vacuum Laminator LiSEC VPL LiSEC Vacuum Laminator Traditonal Vacuum Laminator Materials PVB EVA Balance of Temperature Not that important PVB = Thermoplastic material +/- 2K Need expensive electric or oil heating to control Temperature control constant Less energy consumption Different temperature at the top and bottom Additional cooling process Laminating time 5 minutes 10 – 15 minutes Consumables none membranes / diaphragma are changed all ~5000 cycles Edge delamination Flat metal plate - no overpress on the edge of the glass membrane caused an overpress of glass edges – delamination! additional subframe or devices necessary 4 1. Tempering heating process control 2. Anti-infiltration edge sealing 3. Vacuum lamination technology 4. Product advantages and applications Advantages & Applications Long-lasting, stable and reliable SWIMSOL invented a floatable PV module to build a PV power station offshore in the Maldives. In this special climate, LiSEC offers a vacuum lamination edge sealed PV module production solution:  Typical high temperature and high humidity climate  Seawater  High ultraviolet radiation  Physical pressure caused by platform deformation Advantages & Applications Long-lasting, stable and reliable SWIMSOL has established a research institute to test the reliability of seven different types of PV modules. After 3000 hours of high temperature and high humidity testing, only the module encapsulated by LiSEC s vacuum lamination with edge seals have no energy attenuation. Producer Type Backside Lamination foil Edge Sealing Frame After 2000h After 3000h A Glass-Glass 2x2 mm PVB No No -5% -10% B Glass-Glass 2x2 mm EVA No Yes -3% -3% C Backsheet film EVA No Yes -5% -10% D Backsheet film EVA No Yes -20% -65% E Glass-Glass 1.9x1.9 mm EVA No No -2% -2% F LiSEC Glass-Glass 2x2 mm PVB Butyl No 0% 0% G Glass-Glass 3.2x3.2 mm TPO Butyl No -2% -1% Encapsulation line Capacity (for a year / 3 shifts):  50MW PV modules 1 PV module（ 60pcs） /100seconds  350,000m2 of edge sealed glass Facility:  Floor area : 1500m²  Installation power : ~ 800kVA  Energy consumption : ~ 400kW/h PV module production line Thank you ! LiSEC