1. What is a solar water heating system?
A Solar Water Heating System is one of the widely used solar system by which we get hot water with the help of solar radiation for domestic, industrial application etc. It converts Solar Energy into Thermal Energy and can replace any type of conventional heating system / fuel for thermal application like water heating, air heating etc.
2. Where can we use solar water heating system?
Home, Hotel industries, Educational Institutions, Hostels, Hospitals, Dairy Industries, Canteens, Boiler pre-heating application etc. Wherever we need hot water for any application like bathing, vessels cleaning, drinking, cooking etc
We can use this system without any fuel cost. The solar water heating systems are also used in the process industries where the boiler supplies low pressure steam. Solar water heating systems are generally used as an excellent energy conservation and energy efficiency equipment by supplying hot water at 80 digs. to boiler at pre-heater stage.
3.Is solar water heater a viable alternative to gas or electricity?
Yes. Our Solar Water Heaters can be used all year round in many regions and can provide all of your hot waters needs on clear or intermittently overcast days. If it is particularly overcast or raining, electric or gas backup may be required.
4.What happens if one of the tubes is broken?
The vacuum tubes can be replaced very easily. They are also fairly inexpensive. Your local distributor will stock spare tubes. The system can operate with several broken tubes, but the efficiency will be reduced, so it is recommended that broken tubes be replaced immediately.
5.Can I use a solar collector with my existing hot water system?
Normally yes. If your tank cannot accept the solar input directly an additional tank can be purchased to hold the solar heater water. A interal coil heat exchanger in the solar tank allows the water to be pre-heated before entering the existing water heater. A Thermal Store tank is an excellent choice if you are installing to provide both space heating and hot water.
6.Are the solar collectors noticeable on the roof?
If only the collector is mounted on the roof it should blend into the roof design quite well. The solar collectors are very thin and can be flush mounted on a roof. In fact, our Solar Water Heaters are now so unobtrusive they could be mistaken as a skylight. You may have to check with your local council regarding building restrictions when installing your solar collector. The model is also available in a range of colours to match your roof tiles.
7.How do I protect my solar system during subzero temperatures?
If you have a system that is operating in areas with subzero temperatures then freeze protection must be considered. The easiest means of preventing freezing is to use a controller with a low temperatures setting, therefore when the manifold temperature drops below a certain defined temperature (5oC), the pump will circulate, thereby warming the collector up with warm water from the storage tank. The pump will not have to run continually, just periodically, the frequency of which will depend on the outside temperature.
8.Can the solar water heater heat water to a high enough temperature?
Yes, the system can be designed to give you an average output temperature as high as 60-85deg C (140 - 185deg F). If you consider that when having a shower the water temperature is usually around 32-43deg C (90-110deg F), and scalding can occur at 54deg C (130deg F), this temperature output is more than sufficient. In fact in some countries you may have to fit a thermostatic tempering valve to your house plumbing to conform to government health and safety regulations. This valve will temper water down to between 43 and 50deg C (110 -122deg F).
9.What maintenance of the solar water heater and solar collector is required?
Under normal circumstances no maintenance of the system is required. Due to the shape of the tubes regular rainfall and wind should keep the tubes clean. Should a tube become broken it should be replaced. This, however, is an inexpensive and easy job. Any "handy" person can install a new tube. normal heat tube and SHCMV tube solar water heaters and solar collectors can operate with several broken tubes.
10.How do we get hot water even on cloudy days ?
All Runsun units have an auxiliary electric element with an adjustable thermostat to ensure your hot water supply in cloudy days.
11.Are Runsun Solar Water Heaters environmental friendly ?
Solar Water Heater is environmentally safe, conserves resource and reduce the air pollution, which causes acid rain, the "greenhouse effect" and respiratory health problems. One 100 ltrs capacity can prevent emission of 1.5 tonnes of carbon Dioxide per year.
12. How Runsun solar water heater is the feasible investment ?
Investment on solar water heater is 'once investment long benefit'. One 100 ltrs. hot water can bath 4-5 members family, with boiling hot water from 25OC to average 60OC. 100 ltrs Electric heaters consume 5 KWH of electricity. Investment on solar water heater will be got back within 2 years by saving electricity bill if one household income consumes 40% electricity through 2 KW electric water heaters. If solar water heater system is installed, we can save upto 40% electricity and also money. No maintenance cost on electricity or any fuels.
Payback period :
- 2-3 years when electricity is replaced
- 4-5 years when furnace oil is replaced
- 6-7 years when coal is replaced
A 100 ltrs. capacity Solar Water Heater can replace an electric geyser for residential use and saves 1500 units of electricity annually.
- One 100 ltrs. capacity can prevent emission of 1.5 tonnes of Carbon Di Oxide per year.
- The use of 1000 Solar Water Heater of 100 ltrs. capacity each can contribute to peak load saving of 1 MW.