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solar water heater

Solar Water Heater.

How Does The Non- Pressure System Work

The non pressure gravity feed complete system consists of vacuum glass tube collector, and insulated storage tank, feeder tank, and a stand. the evacuated glass tuve are filled with water and exposed to the sun. Thus heating up the water in the glass tubes. as the specific gravity of cold water is heavier than hot water, the hot water in the glass tubes starts to rise in the insulated water tank and the cold water in the tank sinks in to the glass tubes. As this cycle is repeated, water in the solar water heater gets heated. this process in known as the thermosyphon and is based on natueral convection.

TECHNICAL DATA of Osmo Solar water heater

Tube length : 1899mm

Outertube diameter :58mm

inner tube diameter :47mm

Galss thickness :1.6mm

Thermal expansion :3.3*10-6°c

Absorptivity :93%

Coating :AL- N- AL

Inner Tank :SUS 304 -2B with 0.5 mm

Outer Tank :Stainless steel with 0.4mm

Frame :Stainless steel with 1.5 mm/1.2 mm

Insulation :50mm of high density polyurethane foam

SAFETY PRECAUTION

Solar water heater/collector should always be kept and placed out of reach of infants and children.
do not touch or put cold water inside the vacuum tubers if the tuves have been exposed to sun twith out water inside.
the water temperature of the solar water heater can be very high, so please adjust the mixing valve to a suitable positon carefuly anbd test water before bathing. Hot water above 50°c can cause scalding.

MAINTENANCE SOLAR WATER HEATER

Regualary inspect the solar water heater rtank to make sure its not damaged.

Also check for any rusting in the plumbing lines. Do necessary repairs using the authorized service provider.

Blockage or damage to the vent pipes can created severe damage to the solar water heater. once this situation happen , colse the cold water inlet and hot water outlet valves immediately and call the authorized service provider for rectification of the problem.
Do not connect any type of pressure relief device to the vent pipe of this water heater.

Compact Solar Water Heater (Osmo solar water heater)

This is ideal for homes, apartments and residential buildings. Used for supplying domestic hot water with non-pressurized systems.

Products Code	Osmo 240LTR	Osmo 280LTR	Osmo 360LTR
Number of People	3-6	6-8	8 and above
Number of Tubes	20	24	30
Solar Capacity	240 L	280 L	360 L
Dimensions (cm) (Width-Length-Height)	157-155-170	194-155-170	242-155-170
Weight (kg)	83	100	119
Price	44,000	52,000	64,000

Osmo solar water heater installation in Nepal

Osmo solar Water Heater

Osmo Solar water Heater

How Does The Non- Pressure System Work

The non pressure gravity feed complete system consists of Vacuum glass tube collector, and insulated storage tank, feeder tank, and a stand. the evacuated glass tube are filled with water and exposed to the sun. Thus heating up the water in the glass tubes. as the specific gravity of cold water is heavier than hot water, the hot water in the glass tubes starts to rise in the insulated water tank and the cold water in the tank sinks in to the glass tubes. As this cycle is repeated, water in the solar water heater gets heated. this process in known as the thermosyphon and is based on natural convection.

TECHNICAL DATA

Tube length : 1899mm

Outer tube diameter :58mm

inner tube diameter : 47mm

Galss thickness : 1.6mm

Thermal expansion : 3.3*10-6°c

Absorptivity : ³ 93%

Coating : AL- N- AL

Inner Tank : SUS 304 -2B with 0.5 mm

Outer Tank :Stainless steel with 0.4mm

Frame : Stainless steel with 1.5 mm/1.2 mm

Insulation : 50mm of high density polyurethane foam

SAFETY PRECAUTION

1. Solar water heater/collector should always be kept and placed out of reach of infants and children.

2. Do not touch or put cold water inside the vacuum tubers if the tuves have been exposed to sun twith out water inside.

3. The water temperature of the solar water heater can be very high, so please adjust the mixing valve to a suitable positon carefuly anbd test water before bathing. Hot water above 50°c can cause scalding.

MAINTENANCE

1. Regualary inspect the solar water heater rtank to make sure its not damaged.

Also check for any rusting in the plumbing lines. Do necessary repairs using the authorized service provider.

2. Blockage or damage to the vent pipes can created severe damage to the solar water heater. once this situation happen , colse the cold water inlet and hot water outlet valves immediately and call the authorized service provider for rectification of the problem.

3. Do not connect any type of pressure relief device to the vent pipe of this water heater.

COMMON PROBLEMS AND SOLUTIONS

Common problems Reason Analysis Solutions

water feeding problem a)pressure water it too low. b)Feeding pipes frrezes or frost crack. c)Vacuum Tubes are broken. d)leaking of water tank. a)Feeding water later or watting for water supplying. b)Dredging pipes and adding insulation pipes. c) Changing a new one. d) see solutions to the leaking water tank. e) Repairing or changing these accessories.

Water Tank Leaking problem a)Malposition of seal ring. b)Seal ring is broken. c)Leaking from the joint of Electric heater a)Extraction tubes and reinstalling the seal ring. b) changing the new one. c)Reinstalling the electric heater

Water outflowing problem a)pipes blocks up or freezes or the valves dosent work . a)Dredging pipes or changing new valves.

Water temperature is too low a)Installation angle has a large deviation. b)Shelter near to the solar collectors. C)Bad weather, radiation energy deficiency. d)Vacuum tubes surface is covered with dust seriously. e)Vacuum tube piled up or Scaling because of poor water quality. f)One way valve wasnt installed according to requirement, which caused hot water loss. g) pipeline heat preservation measure are not available or water tank insualtion effect decline. a) Modify installation angle. b)Change installation circumstance. c) start auxiliary heating equipment. d) Remove the dust. e) Clean up vacuum tubes. f) Install the own way valve. g)Reinforce the insulation measure

Low pressure for outlet a)The height difference between the outlet (of solar water heater tank) and the shower is less than 3m. a) Preseting the self- protection program of electric heater, there is no need to maintain it.

Too much cold water coming

out before the hot water will

be usable the pipeline is too long

solar water heating system in Nepal Kathmandu

Solar Water Heating Systems in Nepal Kathmandu

Solar Water Heating Systems in nepal heat up water by the use of solar energy. These systems are generally composed of solar thermal collectors, a water storage tank or another point of usage, interconnecting pipes and a fluid system to move the heat from the collector to the tank.

Thermosyphion Solar water heater relies on the natural circulation of water between the collector and the tank or heat exchanger. As water in the vacuum tubes is heated, it rises naturally into the elevated tank while cooler heavier water in then tank flows down to the bottom of the vacuum tubes, causing circulation throughout the system.

For best results, place the top of the collectors at least one feet below the bottom of the tank. Greater height differential will result in greater flow. Larger pipe, shorter runs, and gentle bends will make for an adequate flow rate.

Evacuated Tube technology delivers significantly better performance than traditional absorbers in the market today. Their advanced design incorporates tubes that consist of 3 layer of borosilicate glass with a vacuum layer between them. This vacuum acts like a thermos flask, retaining up to 97% of the thermal energy, resulting in increased efficiency. The sun thermal energy then transferred to the manifold via the heat pipe located inside each tube.

Solar water heating system(SWH) in Nepal is the conversion of sunlight into heat for water heating using a solar thermal collector. A variety of configurations are available at varying cost to provide solutions in different climates and latitudes. SWHs are widely used for residential and some industrial applications.

Non Pressurized Solar Water Heating system are the basic model and the best suitable for cold climate area. This product is developed by most advanced technology even to work at very lower temperatures. Osmo solar water heater is a 100% eco friendly product to supply hot water without electricity for years. It consists of:

Evacuated tubes of high quality borosilicate glass
Inner tanks with SUS 3042B food grade stainless steel
Outer tank with stainless steel; SUS 201BA food grade
Insulating layer of Polyurethane foam 55 mm for 72 hour heat conservation.
Stainless steel brackets
Various capacities to suit your requirements
Suitable for Residential, domestic, hospitals and other commercial – industrial applications
Proven excellent track record at very cold areas
No or bare minimum maintenance

Compact Solar Water Heating system (Osmo solar water heater Regular)

This is ideal for homes, apartments and residential buildings. Used for supplying domestic hot water with non-pressurized systems.

Products Code	Osmo 240LTR	Osmo 280LTR	Osmo 360LTR
Number of People	3-6	6-8	8 and above
Number of Tubes	20	24	30
Solar Capacity	240 L	280 L	360 L
Dimensions (cm) (Width-Length-Height)	157-155-170	194-155-170	242-155-170
Weight (kg)	83	100	119
Price	54,000	64000,000	82,000

Solar Water Heating system (Osmo solar water heater Premium Quality)

This is ideal for homes, apartments and residential buildings. Used for supplying domestic hot water with non-pressurized systems.

Products Code	Osmo 240LTR	Osmo 280LTR	Osmo 360LTR
Number of People	3-6	6-8	8 and above
Number of Tubes	20	24	30
Solar Capacity	240 L	280 L	360 L
Dimensions (cm) (Width-Length-Height)	157-155-170	194-155-170	242-155-170
Weight (kg)	83	100	119
Price	62,000	74,000	93,000

Osmo solar water heater

Osmo solar water heater

Evacuated Tube Collector Solar Water Heaters in Nepal

Osmo solar water heater in Nepal Kathmandu

Working Principle of Evacuated Tube Collector (ETC) System provided by HK Traders :

HK Traders Solar Water Heater, the brand name called osmo solar water heater works on a simple principle.

Solar water heating systems using vacuum tubes made of borosilicate 3.3 which is very good for absorption of heat with special coating to absorb the solar energy are called as Evacuated Tube Collector system. And it is 2.0kg weight. The size of the Tube is 58*1800mm.

Inner glass tube is coated with the world best magnetron sputtering HI- tech layer of CU/SS-ALN with AL base.

Vacuum tube, as shown in the sketch, is the main component, which absorbs solar energy. The vacuum tube is an assembly of two concentric, borosilicate glass tubes.

Air between the gap of two glass tubes is evacuated. It results in high level of vacuum, which acts as the best insulation to minimize the heat loss from inner tube. The black coating on the inner tube absorbs the solar energy and transfers it to the water. The water on upper side of Vacuum Tube becomes hot and get lighter, so it starts moving upwards in the tank. At the same time cold water, which is heavy, comes downward from the tank and is stored at the bottom. The phenomenon is called as natural Thermo syphon circulation, which occurs in every tube.

Thermosyphon Systems : In this type water flows through the system and when water gets warm it rises as cooler water sinks. The collector is installed below the storage tank so that warm water will rise into the tank. These systems do not involve any pump and are more reliable.

HK Traders Evacuated Tube Collector Solar Water Heater in Nepal

Features:

High quality tubes made from borosilicate glass
No clogging/choking
Long lasting
Better performance in winter and cloudy days
Inner glass tube is coated with the world best magnetron sputtering Hi-Tech, layers of CU/SS-ALN with AL base
Heats water to a very high temperature
Makes hot water available even on partially cloudy days
High quality PUF insulation for maintaining high temperature of water inside the tank
Compact
Easy to install, operate and maintain
Works efficiently with hard water
6 mm ss tank thickness for hot water storage
1.2 mm stainless steel stand
Safe and environment friendly

Specifications of Evacuated Glass Tubes:

Material of Glass	Borosilicate Glass
Length	1800 mm
Outer diameter	58 mm
Thickness of Glass Tube	Outer tube thickness: 1.8 mm, inner tube thickness: 1.6 mm
Selective coating type	CU/SS-ALN with AL base

How does solar water heater works

Solar water heaters perform three basic operations before the hot water comes out of your tap:

1. Energy Collection: Sunlight is collected and converted to heat energy.Solar Water Heater is an environmentally friendly device to absorb free renewable solar energy to produce hot water economically

The solar collector is mounted on or near your home facing south. As the sunlight passes through the collector’s glazing, it strikes an absorbing material. This material converts the sunlight into heat, and the glazing prevents the heat from escaping in a similar manner to leaving a car parked in the sun with its windows rolled up. The temperature inside a glazed solar collector on your roof can easily reach 150°C when there is no heat transfer fluid flowing through it.

The two most common types of solar collectors used in solar water heaters are glazed flat plate and evacuated tube collectors. A glazed flat plate collector consists of a shallow rectangular box with a transparent glass “window” covering a flat black plate. The black plate is attached to a series of parallel tubes or one serpentine tube through which air, water, or other heat transfer fluids pass.

An evacuated tube collector consists of several individual glass tubes, each containing a black metal pipe through which the heat transfer fluid passes. The space between the pipe and the glass tube is “evacuated,” so the air is removed.

Although uncommon, unglazed plastic collectors can be used as a seasonal solar water heating system. However, they are used mostly for pool heating. Each collector has its advantages, and each can perform well if matched with the proper, well-designed, storage unit.

2. Energy Transfer: Circulating fluids transfer the collected energy in the form of heat to a storage tank.

Heat energy is transferred from the collector to the water storage tank. In some water heaters, hot fluid is pumped from the collector to the storage tank. The pump is powered by electricity that either comes from an electrical wall outlet or a small photovoltaic module located beside the collector.

In other types of solar water heaters, the sun heats the storage tank directly, so the fluid in the collector is heated and rises naturally to a storage tank above the collector. This type of solar water heater is often referred to as a thermosiphon system. It does not require an electric pump. Passive solar and solar photovoltaic-powered systems will continue to operate even if there is a power outage. The products that require electricity from a wall outlet will not operate during a power outage.

3. Energy Storage

Solar-heated water is stored in an insulated tank until you need it. Hot water is drawn off the tank when tap water is used, and cold make-up water enters at the bottom of the tank.

Solar water heaters tend to have a slightly larger hot water storage capacity than conventional water heaters. This is because solar heat is available only during the day and sufficient hot water must be collected to meet evening and morning requirements.

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