58mm 1800mm Solar Water Heater Evacuated Tubes

58mm 1800mm Solar Water Heater Evacuated Tubes Introduction

RIWATT Evacuated Tubes are the core component of the RIWATT Tube Solar Water Heater and Solar Collector, designed to efficiently absorb sunlight and convert it into usable heat. The single-target evacuated tube is typically used for direct solar water heating applications.

Crafted with precision, RIWATT evacuated tubes feature double-layer borosilicate glass, selected for its improved resistance to hailstone impact and thermal shock. The evacuated structure consists of two concentric glass tubes, sealed in a semicircular shape on one side and connected on the other, creating a highly durable and effective solar collector.

The space between the tubes is evacuated and hermetically sealed, while the inner glass tube is coated with an environmentally friendly, highly sensitive layer. This coating transforms the tube into an efficient solar absorber. Protected from weathering and external elements within the evacuated space, the RIWATT single-target spattering coating (AL/AL-ALN(H)/AL-ALN(L)/ALN) offers extremely low emission and exceptional absorption capabilities, ensuring optimal solar heat retention for long-term use.

Overview of RIWATT SFVA Evacuated Tubes

As the core component of the RIWATT tubular solar water heater, the evacuated tube plays a critical role in ensuring optimal heat retention and long-term performance, making it ideal for solar thermal systems.

The RIWATT evacuated tube is composed of the following key elements:

Inner Glass Tube: Provides structural integrity and heat absorption.
Outer Glass Tube: Protects the inner tube and maintains the vacuum.
Selective Absorbing Coating: Coats the inner surface of the tube, enhancing absorption efficiency with high absorption rates and low emissivity.
Spring Clamp: Secures the glass tubes together, ensuring durability and stability.
Getter: Maintains the vacuum between the two glass layers for improved insulation and heat retention.

Features of RIWATT Solar Glass Evacuated Tubes Features:

1. RIWATT evacuated tubes are designed with advanced borosilicate glass, offering exceptional light transmission and superior strength. These tubes can withstand temperature differences of up to 200°C, with excellent resistance to both cold and heat shock, significantly reducing the risk of breakage.

2.The innovative circular structure of RIWATT evacuated tubes automatically tracks the sun, ensuring maximum efficiency throughout the day. This feature provides a reliable and stable heat supply for your solar water heating system.

3.With a vacuum level of 5*10-4Pa between the two glass layers, the tubes offer superior insulation, minimizing heat loss and maintaining high thermal efficiency for extended periods.

4.The AL/N/AL/SS/CU selective absorbing film coating boasts an absorption rate of over 93%, with reflectivity below 8%, ensuring excellent energy absorption and maximum heat transfer efficiency.

5.The high-quality magnetic sputter coating process ensures strong film adhesion, offering superior resistance to both high and low temperatures. The coating is durable and long-lasting, ensuring the evacuated tubes perform effectively over their 20-year service life.

6.RIWATT evacuated tubes deliver long-term, cost-effective performance, providing optimal heating for your solar thermal system.