
Solar Parabolic Trough Rec 20
Seamlessly integrate solar process heat with your existing industrial steam boiler, slashing fuel bills by up to 80%.
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Description
System Overview
Why do Indian dairies and textile factories need the Power Trough REC-20?
Indian industries face severe challenges due to rising fuel prices and strict emission control norms. The Power Trough REC-20 offers a clean, reliable, and cost-effective solution. By utilizing a linear parabolic mirror tracking system, it concentrates direct solar radiation onto a heat-absorbing steel receiver tube. The heat transfer fluid running through the tube is heated up to 198°C and fed into the factory's main boiler. Since the water or thermic oil is already preheated, the main boiler consumes up to 80% less wood, coal, gas, or diesel, cutting overall energy expenditures significantly.
Cost Savings, ROI, and Government Subsidies
Replacing expensive fossil fuels with solar thermal energy yields massive operational savings. The capital investment for a Power Trough installation typically recovers itself in 2.5 to 3 years. MSME units across India can claim green technology subsidies and avail of attractive interest rates under SIDBI green lending programs. Additionally, under Section 32 of the Income Tax Act, buyers can leverage a 40% Accelerated Depreciation benefit on their tax filings in the first year of operation.
Reliable Operation in Varying Weather Conditions
Engineered specifically for the Indian climate, the Power Trough REC-20 operates efficiently from the hot summers of Rajasthan to the humid coastal zones of Tamil Nadu. The automated tracking system features wind speed monitoring. In the event of high winds or heavy monsoon storms, the troughs rotate automatically to a horizontal safety stow position. The receiver tubes are enclosed in evacuated glass envelopes to prevent heat loss in winter, maintaining high thermal efficiency year-round.
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FAQ
Frequently Asked Questions
How does the Power Trough REC-20 integrate with our existing boiler?
The system is connected in series with your boiler feed-water line. Solar thermal energy pre-heats the water to up to 198°C before it enters the boiler, meaning the boiler requires up to 80% less fuel (gas, wood, coal, or diesel) to raise it to the final steam temperature.
Is this system eligible for NABARD or MSME subsidies in India?
Yes. Radha Solar systems are fully MSME approved. Industrial units and agro-processing businesses can apply for interest subventions, capital subsidies, and accelerated tax depreciation benefits.
What happens on cloudy monsoon days?
The system is designed to work in tandem with your existing boiler. When solar levels drop on cloudy days, the automated control system shifts the thermal load back to the boiler, ensuring zero downtime in your factory production line.
What is the differences between single-axis and dual-axis tracking?
Single-axis tracking (used in troughs) tracks the sun along one axis, usually East to West, which is excellent for linear receivers. Dual-axis tracking tracks both azimuth and elevation, focusing on a single point, which achieves higher temperatures up to 400°C.
What is the typical lifespan of the absorber tube?
The evacuated stainless steel absorber tube is designed to last 20 to 25 years. It is encased in a borosilicate glass envelope with a vacuum barrier to prevent convective heat losses.
How much rooftop space is required for a standard installation?
It depends on the loop size. A standard 10-trough modular system requires approximately 150 to 200 square meters of unshaded roof or ground surface.
Can we run thermic fluid through the parabolic trough?
Yes, the Power Trough REC-20 is fully rated to run thermal oils as the heat transfer medium, which is ideal for process temperatures above 100°C without high loop pressures.
How do we clean the linear mirrors?
They are cleaned by spraying them with clean water, preferably in the early morning or evening when the mirrors are cool, to avoid thermal shock to the glass.
Is there any risk of fluid overheating in the summer?
No. The PLC control system includes an automatic defocus feature. If the fluid temperature exceeds the preset safety limit, the tracking system automatically rotates the troughs away from the sun.
Are these systems compatible with IBR boilers?
Yes, they operate in parallel with standard IBR (Indian Boiler Regulations) boilers, serving as preheaters without altering the pressure rating certification of your existing boiler.
How much diesel can a single trough loop save annually?
A medium-scale loop of 150 square meters of collectors can save up to 10,000 to 12,000 liters of diesel fuel per year under typical Indian sunshine profiles.
What is the payback period for food processing units?
Typically between 2.5 and 3 years. If the food processing plant operates in multiple shifts and uses hot water continuously, the payback can be even faster.
Does the system need a structural foundation?
Yes, we build secure concrete pedestals on ground installations, or utilize roof-clamping brackets anchored into the building's load-bearing beams.
Is remote tracking monitoring available?
Yes, all tracking parameters, loop temperatures, and calculated heat generation are loggable via SCADA or internet-connected PLC modules.
What type of glass is used for the parabolic mirrors?
We use high-reflectivity, low-iron tempered silvered glass designed specifically for concentrated solar thermal applications to maximize reflectivity and resist scratching.
What are the tax benefits for installing this equipment?
In India, you can write off 40% of the asset cost in the first year under the Accelerated Depreciation tax rules, reducing your company's net income tax liability.
Are there any pollution control board benefits?
Installing solar thermal units demonstrates a proactive reduction in fossil fuel burn, which helps in securing approvals and clean-air compliance clearances from state pollution boards.
What happens in the winter months?
On clear winter days, the system performs exceptionally well because the low ambient temperature does not affect the evacuated receiver tube, which has high vacuum insulation.
Does the tracking system consume a lot of electricity?
No, the single-axis tracking motor consumes very little power, typically less than 0.5 kWh per day, as it rotates slowly to keep track with the sun.
Can it generate high-pressure steam directly?
Yes, depending on design configuration and system length, it can produce steam up to 10 bar pressure when designed as a direct steam generation (DSG) loop.
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