large size flat panel solar collector

Overview

The Flat Plate Solar Collector is a premium pressurized solar thermal system designed for high-demand residential and commercial applications. Its state-of-the-art construction combines a laser-welded copper absorber grid (0.4mm thickness) with a titanium-nitride (TiNOX) selective coating, achieving 92% solar absorption and unprecedented stagnation temperatures of 210°C. Encased in 4mm tempered low-iron glass with anti-reflective treatment, the collector maximizes light transmittance while resisting thermal shock and mechanical stress. The hermetically sealed aluminum casing filled with 40mm rock wool insulation ensures less than 3% nightly heat loss. Compatible with closed-loop glycol systems and operating at pressures up to 10 bar, this collector excels in space heating, industrial process heat, and large-scale DHW (Domestic Hot Water) production, offering a 25-year performance warranty for peace of mind.

Features

1. Advanced Hydraulic Design: Parallel serpentine copper tubing (12mm diameter) ensures even heat distribution and reduces pump energy consumption by 30%.

2. Ultra-Low Maintenance: Non-corrosive EPDM gaskets and anodized aluminum frame resist UV degradation and salt spray (tested to ISO 9227).

3. Smart Drainback Ready: Optional drainback port prevents fluid stagnation and freezing in sub-zero conditions.

4. Architectural Integration: Slim 80mm profile and black anodized finish blend seamlessly with modern rooftops or façade systems.

5. High-Pressure Resilience: Tested at 15 bar burst pressure, exceeding industry standards for commercial installations.

6. IoT Compatibility: Sensors can be added to monitor real-time efficiency via building management systems.

Applications

· Apartment complexes and hotels with centralized water heating networks.

· Hospitals and laboratories requiring sterilized hot water.

· Textile and beverage industries for process heat between 50°C–90°C.

· Solar-assisted district heating plants.

· Snowmelt systems for driveways and helipads.

FAQ

Q: What fluid is recommended for closed-loop systems?

A: A propylene glycol-water mix (40%–60%) is advised, with freeze protection down to -35°C and boil protection up to 150°C.

Q: How does it perform in high-wind areas?

A: Wind tunnel tested at 150 km/h, the collector maintains structural integrity with stainless steel mounting clamps (included).

Q: Can damaged glass be replaced onsite?

A: Yes, the modular glass panel can be individually replaced using standard tools without draining the system.

Q: What is the peak efficiency rating?

A: Under ASTM E894 testing, it achieves η0 (optical efficiency) of 0.83 and a heat loss coefficient (a1) of 3.8 W/m²K.

Q: Does it require a heat exchanger?

A: Only for potable water systems—double-wall brazed plate exchangers (ASME certified) are recommended.

Flat plate solar collector specification