Skip to main content
Solar Parabolic Trough Rec 20
Single-Axis Tracking82°C - 198°C TemperatureUp to 80% Diesel SavingsIBR Boiler Compatible

Solar Parabolic Trough Rec 20

Seamlessly integrate solar process heat with your existing industrial steam boiler, slashing fuel bills by up to 80%.

Thermal Output82°C - 198°C (Process Heat)

Product Gallery

Solar Parabolic Trough Rec 20 - Image 1
1 / 7

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.

State-Wise Use Cases:

Gujarat: Pre-heating boiler feedwater for large cooperative dairies in Anand, Mehsana, and Sabarkantha, cutting gas fuel costs.
Rajasthan: Process heat for textile processing, yarn washing, and chemical plants in Pali and Balotra.
Punjab: Solar steam generation for milk pasteurization and food packaging plants in Amritsar and Ludhiana.
Haryana: Process heating for food processing and metal finishing clusters in Sonepat and Bahadurgarh.
Maharashtra: Hot water loops for industrial laundry, textile mills, and chemical plants in Solapur, Bhiwandi, and Ichalkaranji.
Uttar Pradesh: Clean steam loops for milk chilling and paper processing factories in Meerut, Aligarh, and Ghaziabad.
Tamil Nadu: High-volume hot water generation for textile finishing and sizing mills in Tirupur, Salem, and Coimbatore.
Karnataka: Boiler preheating for agro-processors and beverage bottling plants in Mysore, Dharwad, and Shimoga.
Chat on WhatsApp

Specifications

Technical Specifications

Operating Temperature82°C - 198°C (180°F - 390°F)
Boiler CompatibilityWorks with Oil, Gas, Biomass & IBR Boilers
Fuel Cost ReductionUp to 80% savings in fuel consumption
Tracking MechanismAutomated Single-Axis (East-West tracking)
Safety ControlsOverheat bypass & auto-stow for high winds
Installation TypeRooftop or Ground-level modular mounting
Payback PeriodUnder 3 Years with commercial subsidies

Features

Key Design Features

High-reflectivity parabolic concentrator focusing solar rays onto a central receiver tube
Independent automated single-axis tracking system to capture peak solar radiation all day
Modular layout connecting up to 10 troughs in series for scalable plant capacities
Auto-stow safety controls for wind protection, monsoon rains, and over-temperature bypass
Seamless integration with commercial steam boilers, reducing boiler load and thermal shock
Optimized compact footprint utilizing factory rooftops or ground land efficiently
Highly durable evacuated receiver tubes preventing convective heat loss
PLC controller with automated diagnostic indicators and visual touchscreen interface
High-grade hot-dip galvanized steel framework resisting corrosion in humid environments
Integrated bypass valves to regulate thermal fluid circulation speeds
Self-lubricating joint bearings reducing mechanical wear and maintenance overheads
Plug-and-play connection modules for quick assembly and installation on-site

Video Gallery

System Demonstrations

Applications

Industrial Implementation

High-volume hot water pre-heating for industrial dairy processing and cleaning
Low-pressure process steam generation for cooking and canning lines
Thermic fluid pre-heating for textile dying and chemical manufacturing
Sterilization heat for pharmaceutical production and hospital laundries
Solar air conditioning integration (driving absorption chillers)
Heating process loops in paper pulping and cardboard manufacturing
Hot water supply for massive commercial wash setups and hotel laundries
Pasteurization heat for fruit juice and beverage processing lines
Preheating crude oils in processing and blending facilities
Boiling and concentration loops in sugar processing units
Drying chambers for timber seasoning and plywood manufacturing
Chemical washing and cleaning bath heating in electroplating industries
District heating systems for remote rural community housing
Washing water loops for fish processing and seafood exports
Low-temperature distillation and solvent recovery systems

Benefits

Operational Advantages

Massively cuts monthly diesel, gas, or biomass expenditure in commercial factories
Reduces dependency on coal and wood fuel, helping companies meet ESG and carbon mandates
Protects industrial operations from unpredictable domestic fuel price hikes
Qualifies for state-level renewable energy incentives and green corporate tax credits
Low maintenance design built with high-grade materials to withstand Indian seasons
Reduces structural load on existing boiler systems, extending their operating life
Eligible for 40% Accelerated Depreciation tax benefits under Section 32
Automated East-West tracking requires zero manual intervention during operation
High thermal conversion efficiency reduces the overall rooftop footprint required
Designed with wind protection auto-stow to safeguard against cyclonic weather
Zero direct greenhouse gas emissions, matching corporate carbon offset targets
Modular design allows scaling thermal output as factory capacity expands
Highly durable glass-metal seals on receiver tubes minimize vacuum leakage
Enables continuous heat output by utilizing existing boilers as auto-backups
Supports compliance with regional environment pollution control board mandates

Target Industries

Dairy & Milk ProcessingFood Dehydration & ProcessingChemicals & PharmaceuticalsTextiles & Garment WashingHotels & Commercial LaundriesBreweries & DistilleriesPaper and Cardboard PackagingRubber and Plastics VulcanizingMetal Surface CleaningSeafood and Meat ProcessingWood and Timber Yards

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.

Complementary systems

Related Solar Solutions

Solar Parabolic Disc Concentrator
Dual-Axis TrackingUp to 400°C focal heat

Solar Parabolic Disc Concentrator

The Radha Solar Parabolic Disc Concentrator is a high-temperature, dual-axis tracking solar thermal system engineered to revolutionize industrial process heat. Designed to generate intense focal temperatures up to 400°C, this advanced solar concentrator acts as a direct, zero-emission replacement for high-cost fossil fuels such as diesel, light diesel oil (LDO), and furnace oil in industrial boilers. By tracking the sun's trajectory dynamically with PLC-controlled precision, the parabolic disc concentrates solar radiation with over 94% optical reflectivity, delivering unmatched thermal efficiency. It is an ideal green energy solution for energy-intensive sectors like chemical processing, textile dyeing, pharmaceuticals, and large-scale community steam cooking. Indian manufacturing units can leverage this MSME-approved green technology to drastically lower fuel bills, reduce carbon footprints, and enjoy attractive financial incentives like Section 32 Accelerated Depreciation (40%) and capital subsidies. Built with structural durability to withstand extreme Indian weather conditions, it offers long-term reliability and a rapid ROI of 2.5 to 3 years.

View Details
Industrial Solar Dryer
NABARD Subsidy EligibleFSSAI Food Grade

Industrial Solar Dryer

The Radha Solar Industrial Solar Dryer is a high-performance, FSSAI-compliant dehydration system designed to address post-harvest losses and high drying costs in Indian agriculture. By utilizing advanced solar air collectors, this closed-loop system circulates clean, heated air at controlled temperatures between 35°C and 85°C, drying crops 60-80% faster than traditional open-sun drying. It is an ideal solution for Farmer Producer Organizations (FPOs), spice manufacturers, herbal extractors, and food processors who require a hygienic, weather-independent drying environment. The built-in hybrid backup heating system (electrical or biomass-based) ensures uninterrupted 24/7 operations even during heavy monsoons or cloudy winter days. Constructed with food-grade SS304/SS316 stainless steel to prevent contamination from dust, insects, and bird droppings, the dryer preserves the natural color, nutrients, and aroma of high-value crops. The equipment is fully eligible for NABARD capital subsidies and state agriculture department grants, making it a highly profitable investment for agricultural entrepreneurs.

View Details