Posted by admin on Jan 11, 2014 in Posts
Since solar water heaters are so useful it is very popular all over the world but not in India. This steady but slow pick up in India is there because few reasons such as installation or cost. Hence a major difference can be found in the price of solar water heater in India and any other part of the world. In case of bulk orders, it may cost around Rs 9000 to Rs 12000 which may depend on usability as it can cost less for industrial purpose since many units are used. Single unit for household usage may cost somewhere between Rs 13000 to Rs 28000. But, in summer their prices are decreased due to the higher production and installation of the device in households. In cold weather conditions, countries like China decrease the cost so that it raises interest in many which is benefited to India. India has a great potential to use solar energy for their needs, but comparatively country is lagging behind others. Now situations are changing due to many reasons such as • National solar mission has been launched this year so that they get more demand due to decrease in price of solar products. This will have a greater impact on several industries because of their reduced prices. • Reduction in government subsidies- there is a reduction even in commercial and rural banks’ interest in a low cost financing scheme, which will cut down the high costs of solar water heater paid by customers in India. The change is instead of capital subsidy one has to pay interest subsidy, which favors in decreasing the cost of solar heaters in India. In 1990, there were less than 6 manufacturers of solar heaters in Karnataka, but due to this change it has increased to 60 in 2005. Hence more manufactures will be available, and there will be greater price competitiveness which encourages lowering in solar water heater price. Though the initial cost is a bit more, but, later it is much useful, worthy and secured lifelong. The prices in India are considerable with low interest rates for rural families, which will serve solar water heating as another product for them. Since wood fired water heaters are used in rural areas, which is less significant in the reduction of costs. But, a solar water heater is pollution free and better than wood fired water heaters or even electrical heaters. The only way of getting lower cost of solar heaters available in India is, more and more people should show interest in installing it in their...
Read More »
Posted by admin on Jan 11, 2014 in Posts
Hot water required for commercial/industrial purposes or residential activities can be obtained from solar water heating which makes the water hot by solar energy from sunlight. Solar water heating consists of water storage tank, heat transfer fluid (HTF), and solar thermal collectors. Solar hot water devices are functioning through active (pumped) or passive (compact) ways. The solar collector which is attached on the surface of wall or roof, so that sunlight falls directly on it, and, the water is warmed which is passed through an active SWH or a convection passive process. Batch heaters, Flat plate solar thermal collectors and evacuated tube collectors. Collector consists of water storage tank which stores heat. The solar water heaters are capable to function during sunless days or at a low temperature through a secondary energy source fixed to it. Features of solar water heaters: SWH provides you active (pumped) and passive (compact) to retrieve solar hot water devices from these versions. Water storage tank is provided with an inlet and outlet to store heat. Provide you direct passive solar water heaters, which receive water, and circulate between the collector and the storage tank. SWH provides solar hot water device whose maintenance is cheap and effortless. Provides you non-passive appliances, which are useful for you to heat and retain the hot water. During sunless days, secondary energy source is activated so that solar water heaters functions as usual. It is assembled by experts at a correct place where sunlight falls directly on the surface. Under provision, it is assembled such that there is no variation occurs outside temperature and sun radiation between summer and winter. Collectors are made from a material which is black painted and insulated with a glass cover so that sun rays falls on it will be absorbed by a solar metal absorber that is flat and connected to the copper pipes, or various metal tubes enclosed by a near vacuum (evacuated) cylinder of glass. And much more. Solar water heaters can be used to get hot water for household activities or industrial purposes, anytime during summer or winter. The tank is fixed inside a box with insulated side walls with a glass lid so that no heat wastage occurs when heat is allowed into the storage tank. These solar hot water devices cannot be a better device in cold weather as water in the solar thermal collector can freeze which may damage the...
Read More »
Posted by admin on Jan 11, 2014 in Posts
Conventional water heaters particularly the gas and the electric one’s are good and require low initial investment to setup, but in the long run they prove to be costly and inefficient; whereas a solar water heater is equally effective in providing ample amounts of hot water up to 140°F at almost no cost. Multiple factors determine the amount of hot water a solar water heater can provide the principal one’s ear: The ability of the site to access sunshine. The type and the size of the solar heater to be installed. The typical climate and its influence on the site. Basic design of the building in question. “Flat plate” solar water panels are the most commonly used ones, it consists of simple and durable parts namely a weatherproof, thermally insulated box made up of aluminum or ceramics and one absorber plate. Its more expensive counterpart is a concentrating type system, which can heat water up to much higher temperatures, but are less effective on cloudier days than their less costly counterpart. Before going for a solar water heater, one should get a free energy audit of their homes to precisely determine the cost savings one can get. There are certain factors that should be considered for an energy audit. The important ones are: Expenditures and complexities to set up piping, ducts and plumbing from the terrace on the ground floor. Whether the roof is suited and accessible so that power panels can be fitted, and if not then an equivalent place on the ground. If wall sections will be required to open up to allow water pipes to pass through. The room’s on the ground floor and the basement has space for a water tank, and if it is possible to move or load the water tank in it. The time required and the ability of the roofing materials to fasten with the collector’s support. (e.g. Materials like slate, tiles, and clay are difficult to work with) Aesthetics and design of the home once the system is in place. Some tips and advices for the best functioning of your solar water heater: Always keep the solar collector panels facing the sun at a right angle. Bypass or avoid shade particularly during 9 am and 3 pm. Set up the solar water heater such that it faces true south and not towards the compass...
Read More »
Posted by admin on Jan 11, 2014 in Posts
Passive Solar Water Heaters – How are they different from Active Solar Water heaters? Looking at the present scenario, Energy uses have risen tremendously in the last few decades which in turn have made it much costlier in the long run. The savings keep on reducing while the number electrical appliances in homes are on a rise; in this situation going for solar water heater can prove to be an excellent choice for cost cutting and sustainability. Solar water heater can be broadly classified into two different types: Active and Passive. They both depend upon the sun’s energy, but they have differences in their working mechanisms. This article will explain all about passive solar heaters and why it is a cost effective way to water heating solutions. The two basic parts of a solar heater are an insulated water storage tank and a solar collector. The solar collector is the one which heats the water and move it up into the tank. The storage tank is similar in design to a tank type electric heater and performs almost the same functions. A drawback of a passive system is its lesser efficiency, but it is more durable, reliable and when compared is less costly than an active one. They are generally available in two different varieties, one the integral collector storage (ICS) and the other thermo siphon system. The ICS system has the storage tank situated below the solar collector, in which the cold water flows, gets heated and then transferred to the storage tank for use. This is suited for tropical or hot weather climate where temperatures never touch freezing point; moreover this water heater is practical for daytime and evening use. The thermo siphon is a bit different than the ICS system as it keeps the storage tank above the solar collector tubes and relies on natural physics that hot water being less dense rises up and cold water sinks. The cold water leaves the base of the tank and moves into the tubes where it gets heated and rises up into the storage tank. It is suited for moderate climates and also for day and night use. Solar heaters are a very reliable and economical source of hot water, but they also rely on the Sun for their working. On days when it is way too cloudy or additional amount of hot water is required, calls for a backup...
Read More »
Posted by admin on Jan 11, 2014 in Posts
When we think about solar energy, the first thing that comes to our mind is harnessing the power of the sun’s radiation to produce energy or heat water as required. A solar water heater consists of solar thermal collectors and a fluid system which runs through interconnecting pipes and moves the heat from the collector to the tank. The heated water available from these heaters can be used for business and domestic purposes and save a fortune in the long run. Common places where solar water heater is perfectly suited are under floor heating, heating of swimming pools and energy input for space heating and even cooling. While choosing a solar heater, there are certain considerations that should be made. The first and foremost is the amount of sunshine, the required usage and the type of solar water heater. It consists of the following parts Solar collector to absorb energy from the sun. Power source for backup. Pump and control valves. Hot water storage tank. Solar collectors can be broadly categorized into the following types: Evacuated vacuum tube collectors which have a series of glass tubes to take in energy. Absorbing plate collectors which are simpler to build and have heavy thermal insulators and glass covering to prevent escape of heat. Integral collector type which combines a storage tank to serve the functions of both heating and storing in a single unit. One thing to know is all the solar heaters are mounted on to the roof top from where they supply hot water for domestic and business purposes. Manufacturers of solar water systems are plenty in numbers and they can provide precise information about local dealers and qualified installers. A solar setup once installed requires occasional upkeep and maintenance and has high initial costs, which can be covered up in a few years. A setup which has complexities and requires roof penetration should be installed and looked after by an experienced and certified contractor to avoid future complications. A solar heater and its parts carry a warranty between 3 to 10 years depending upon type and manufacturer. Ample information is available on the web; the manufacturer’s website provides all the information that is required. Knowledge and understanding of how a solar system works will always help to keep your home eco-friendly, green and a healthy aid to sustainable...
Read More »
Recent Comments