FLATE PLATE COLLECTOR (FPC)
SYSTEM MODEL



EVACUATED TUBE COLLECTOR
(FPC) SYSTEM MODEL
India is truly blessed with bountiful and bright sunshine for most part of the year. Tapping sun’s energy potential for solar water heating has been a harbinger for households which not only want to save on power bills, but more importantly with planned load shedding in many parts of the city and erratic power supply in many smaller towns harnessing solar power for heating water is the only solution. What’s more , it is simple to install, easy to maintain and helps the environment by being 100% eco-friendly and green.
MODELS CAPACITIES
Evacuated Glass Tube Collector Type (ETC) 100, 150, 200, 250, 500 LPD (Litres per day)
Flat Plate Copper Collector Type (FPC) 125, 200, 250, 375, 500, 625, 50, 900, 1000, 1250, 1500, 1750, 2000, 2500, 3000, & + LPD (Litres per day)
Higher capacity also available as per site requirement






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Thermosyphon System (Non Pressure Type)
The working is based on the principle of black body heat absorption, The black surface of the collector absorbs the heat from the solar radiation and transfers it to the water circulating through the copper tubes of the absorber panel. Hot water being lighter than cold water rises to the top of the collector and subsequently-into the hot water storage tank. This cycle goes on during hours of sunshine. This phenomenon is called Thermosyphon. At the end of the day the tank is full of hot water at designed temperature.
 
APPLICATIONS
• Generally installed for domestic applications
• Ideal for fixed one time usage
• They have fixed volume but varying temperatures
 
Thermosyphon type (Non-pressure type)
Ideal for domestic use
This is most suitable for domestic applications. Operating on a simple principle of physics, hot water has low density than cold water and has a tendency to rise. By this natural phenomenon, water circulates from solar collector to storage tank through natural convection
Forced Flow Systems (Pressure Type)
Forced Flow Systems (Pressure Type) Cold water from cold water tank is pumped into the collector. The solenoid valve/pump motor On/Off operation controlled by temperature sensor gets activated as soon as the temperature in the solar collector attains ‘x’ degrees pre-selected by customer and will remain ON till all the hot water is replaced by cold water in the collectors. This cycle goes on throughout the day during sunshine period, till the tank is full. Liquid Level Controller controls the overflow of hot water after the hot water tank is full. The operating cycle depends on the intensity of solar intensity and this frequency is maximum during around noon.
APPLICATIONS
• Generally installed for industrial & commercial applications
• Ideally suited for deferred usage
• There are 2 types of forced flow systems
i) Open loop systems. They have varying volume but fixed temperature.
ii) Closed loop systems. They have fixed volume but varying temperature.
 
Forced-circulation type (Pressure type)
Ideal for commercial and indusrtial establishments
This is most suitable for domestic applications. Operating on a simple principle of physics, hot water has low density than cold water and has a tendency to rise. By this natural phenomenon, water circulates from solar collector to storage tank through natural convection
Types of Solar water heater based on collector type
FLAT PLATE COLLECTOR (FPC) SYSTEM MODEL
(Based on pressure of water or location of storage tank)
 
SPECIAL FEATURES
• Water-proof construction:
Special components are used that makes it waterproof, enhancing efficiency, durability and performance.

• Unique frame:
Pre-coated GI sheet or aluminum are used for better insulation, structural strength and capable of withstanding mechanical shocks.

• Ultrasonic welding:
Laser beam welding technology is used to ensure highest heat transfer co-efficiency. Permanent molecular bonding between copper tubes result in high heat absorption and better efficiency.

• Absorber material:
Headers,Risers, and fins are made using 99.9% pure copper with selective black chrome coating.

• Toughened glass:
Clear toughened glass ( 4mm thick) can withstand mechanical shock.

• Insulation:
Hi density rockwool insulation or PUF Hi-quality thermal insulation at the bottom and side panel ensures minimum heat loss.

• Strong mounting system:
Powder coated mounting stand ensures durability.
EVACUATED TUBE COLLECTOR (ETC) SYSTEM MODEL
SPECIAL FEATURES
• Maintenance-free, easy to clean
• Better performance in winter and cloudy days
• Hard water / scaling does not corrode ETC tube
• Minimum heat loss due to evacuated tubes & insulated storage tank
• Greater absorption area per day
• Upto 90% sun tracking collection
• Electric back-up for non sunny days
Metal insulation layer (Copper)
Reduce heat loss and low emission rate.

Absorption layers
Stainless steel & enameled mirror anti-corrosion & anti oxidation.

Anti-reflection layer
Ensure high absorption rate & low emission rate by reducing reflection
 
COMPARISION
FLAT PLATE COLLECTOR (FPC) SYSTEM MODEL
• Suitable for water with higher pressure
• Ideal for municipal water
• Mechanically stronger
• Initial capital cost is higher
FLAT PLATE COLLECTOR (FPC) SYSTEM MODEL
EVACUATED TUBE COLLECTOR (ETC) SYSTEM MODEL
• Suitable for water with lower pressure
• Ideal for hard water
• Prone to glass breakage
• Initial cost is lower than FPC
EVACUATED TUBE COLLECTOR (ETC) SYSTEM MODEL
 
 
TYPICAL INSTALLATION

500L FPC installed at Lonavala-Maharastra
 
 
  A HOLISTIC SOLUTION
Tank technical details
Outer body MS powder coated / Aluminium
Inner container Stainless steel ( SS304 / SS316 depending upon requirement) or MS epoxy coated
Insulation 50mm thick rockwool / glasswool / PUF
Electrical backup Optional available 3 kW for smaller systems and larger sytems with 6kW, 12 kW and above
Anode protection Optional available
Operating pressure 0.5 BAR for ETC models, 1 BAR for Normal Flat Plate Systems, 4 BAR for Pressurized Flat Plate Systems
The Ketko Solar Advantage
Characteristic KETKO Solar Other Brands KETKO Solar Advantage
Outer body MS powder coated Plastic Water heater long life and rust resistant
Inner container SS 304, SS 316 SS ordinary, MS Durable and corrosion resistant
Insulation PUF / Rockwool / Glasswool Rockwool Many options and high heat retention
Pressure tested capacity 5 BAR 1 or 4 BAR Highest in category
 
Monthly saving on electricity bills
Electric Water Heater Electricity cost kW/Hr Number of days/month Monthly electricity bill (In Rs) based on following daily usage
      1 hour 2 hours 3 hours
2kW Rs 9* 30 540 1080 1620
3kW Rs 9* 30 810 1620 2430
* Considering electricity cost as Rs.9 unit.
 
Applications as per consumption
Applications as per need of hot water Grade type Standard water consumption pattern
Independent flat/ apartments/ residential complex - 125 to 250 litres / flat
Bunglows/ villas - 50 litres / person
Hotels, resort A grade 75 to 100 litres / person
Star grade 150 to 200 litres / person
Hostels, hospitals Common tap 20 to 25 litres / person
Bathroom connection 30 to 35 litres / person
Industries chemical,textile,hatcheries, pharma, milk dairies restaurants , canteens , anywhere hot water is needed As per application
 

TYPES OF WORKING PRINCIPLE
Thermosyphon
Forced flow