What is the delivery medium for thermal energy?
ARUN solar boiler can assist in delivering pressurized hot water, steam or hot thermic fluids like oil.
What temperatures can be delivered by ARUN?
ARUN solar boiler can deliver thermal energy up to 400°C while the stagnant temperature (i.e. temperatures possible under no load condition) is 1500°C.
What is the height of the dish?
ARUN 160: 18.5 m from top to bottom.
ARUN 100: 11.5 m from top to bottom.
What is the weight of the dish?
Approx Static load of ARUN160 is 20 tons.
Approx Static load of ARUN100 is 12 tons.
What is the size of ARUN dish?
ARUN 160 is 169 sq m in aperture area.
ARUN 100 is 104 sq m in aperture area.
How much foot print is required for installation of the ARUN dish?
1m X 1m is required for the dish, whereas 2mX2m is needed for the integration. This may vary from project to project.
What is the effect of high wind on ARUN dish?
ARUN solar boiler can sustain in wind speed of up to 45 m/s i.e. 162km/hr in non-operational mode, and can operate effectively in wind speed of up to 10m/s i.e. 36km/hr.
What happens in monsoons?
ARUN solar boiler dish is not functional when it rains. Hence a back-up heating system needs to be provided.
What are the factors that impact the performance of ARUN solar steam generating system?
Optics, receiver and integration scheme are the three most crucial components in any solar concentrator system.
- Optics of ARUN is based on the Fresnel concept, allowing simplicity in structure, while maintaining maximum accuracy.
- The cavity shaped receiver is designed to withstand high temperatures & minimize losses.
- Clique Solar is particularly skilled in integrating ARUN with a variety of industrial processes.
This enables ARUN solar boiler to achieve very high temperatures. ARUN solar boiler can deliver temperatures up to 350-400C; in comparison, most other commercially available technologies in this sector can reach only about 130-140C.
What is accuracy of delivery: temp, pressure, etc?
The accuracy of the delivery of the output by the ARUN system is about ±1 ºC.
What is concentration ratio?
Concentration ratio for ARUN solar boiler is about 600x.
What is the basic operation philosophy of the ARUN solar steam generating system in case it is used for, say, steam generation?
The basic operation philosophy of the ARUN solar boiler is very simple. The system operates during sunny hours. The receiver at the focus of the dish transfers the heat of solar radiation to a heat transfer medium, that is, water. This water is pumped from the condensate tank through the ARUN dish using a reciprocating pump. Once the water is converted into steam, and desired pressure & temperature is achieved, the steam is delivered to the common header in the boiler room. The steam is then used in the application area. The return condensate is delivered back into the condensate tank. The operation principle of a hot water or oil heating system will be similar to this.
How does ARUN dish track the Sun?
ARUN solar boiler uses a two axis tracking system (horizontal and vertical axis). The system uses micro controller based electro-mechanical tracking system. The dish remains perpendicular to the sun rays with the accuracy of ±0.1°. Cloudy weather does not affect the tracking of dish but the output of the dish will be reduced due to lower radiations.
Can the energy produced by ARUN concentrated solar thermal system be stored for heat delivery in non-solar hours?
Energy produced by ARUN solar boiler can be stored in the form of pressurized water up to 200°C & in the form of hot oil up to 400° C in an insulated storage tank. This can then be delivered to the application either directly or through a heat exchanger.
What is the energy payback period of ARUN?
The energy payback period of the system is 8 to 10 months, i.e. the energy consumed in the manufacturing of ARUN dish is recovered by ARUN dish in only 8 to 10 months. The typical energy payback period for solar photovoltaic modules is 4-5 years.
What are the activities involved in the commissioning process?
Once the installation activities and the mechanical job are completed, pre-commissioning checks and trials are carried out by the commissioning team deputed from H.O. During the commissioning phase, the client’s operators are trained for the operations and maintenance of the system. When the plant is commissioned, all performances are jointly recorded and signed. After the trials and guarantee runs, the plant is handed over to Client.
How many units of energy are consumed in tracking by pumps & what is the total energy consumed by the dish?
Operating energy of ARUN CST system is negligible & accounts for 1 unit of electricity in tracking. Majority of the energy consumption is by pumps, in the range of 10 to 15 units per day of electricity. Hence the total electrical energy for ARUN system is about 11-12 units of electricity.
Tell me something about the government subsidy for ARUN.
Clique Solar is responsible for obtaining the subsidy as we are a channel partner under Jawaharlal Nehru National Solar Mission (JNNSM). The company charges the client net of subsidy. MNRE provides subsidy at the rate of Rs. 6000/- per sq. meter for the ARUN dish.
What is accelerated depreciation? Is any certification required to avail the same?
Accelerated depreciation is a method of depreciation used for accounting or calculating income tax, that allows greater deductions in the earlier years of the life of an asset. This helps the owner of the ARUN concentrated solar thermal system asset to claim substantial tax savings in the initial years. No separate certification is required for the same.
How about the insurance cover?
Till the time of erecting & commissioning, insurance will be provided by Clique Solar. Subsequently, the coverage will be taken by the client.
What is payback period?
Due to accelerated depreciation and government subsidies, equity payback is less than 2 years. Project payback would range between 3 and 5 years.