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High Efficiency Heat Pipe Collector

1. Thermal conductivity of the heat pipe reaches 99%
2. Heat transfer begins within 5 seconds
3. 3003 aluminum fins provide strong resistance to corrosion, salt fog, and long-term sunlight exposure
4. Built-in thermal diode effect blocks reverse heat flow
5. Winter heat exchange efficiency remains above 55%
6. Stable operation even at –50°C without freezing or scaling risks

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Product Details

As global energy systems accelerate toward decarbonization and low-carbon development, solar thermal utilization is playing an increasingly important role in replacing traditional fossil-fuel-based heating. Among all solar thermal technologies, the heat pipe solar collector has emerged as a high-performance benchmark product.

By utilizing a sealed phase-change heat pipe system, heat is transferred through rapid vaporization and condensation of the internal working fluid. This mechanism enables the collector to fundamentally solve long-standing problems of traditional solar collectors, including slow thermal response, efficiency degradation under cold climates, and high failure risks caused by freezing or overheating.

Today, heat pipe solar collectors are widely adopted as a reliable green thermal solution for commercial buildings, industrial facilities, and public infrastructure.

High Efficiency Heat Pipe Collector

1. Designed for Centralized Hot Water Systems Across Multiple Sectors

Thanks to its stable operation, modular design, and strong environmental adaptability, the heat pipe solar collector is especially suitable for medium- and large-scale centralized hot water projects, including:

· Hotel and hospitality complexes

· Educational institutions

· Healthcare facilities

· Public swimming pools and sports centers

· Worker dormitories and government buildings

The system provides:

· Stable 24-hour hot water for hotels

· Reliable high-frequency water usage for campuses

· Strictly controlled sanitary hot water for medical systems

· Constant temperature control for pool water heating

It serves as a core clean-energy heat source wherever continuous and intensive hot water demand exists.

2. Core Technical Advantages That Redefine Collector Performance

2.1 Fully Sealed Heat Transfer Structure

Long Service Life with Zero Leakage Risk

Unlike conventional systems where water flows directly through collector tubes—leading to leakage, corrosion, and scaling—the heat pipe collector adopts a completely sealed heat transfer circuit.

This design:

· Eliminates leakage risks

· Prevents internal corrosion

· Blocks external moisture and impurities

· Extends service life to over 15 years

· Significantly reduces long-term maintenance costs

2.2 Super-Conductive Metal Heat Pipes

Extremely Fast Thermal Response with High Conversion Efficiency

Heat is transferred via phase-change conduction rather than traditional solid heat conduction. This allows:

· Heat transmission speed dozens of times faster than copper or aluminum conduction

· Thermal efficiency above 80% under sufficient sunlight

· Efficiency improvement of 10%–20% compared with conventional vacuum tube collectors

· Ultra-short 5-second start-up time, instead of several minutes for traditional collectors

This feature ensures efficient heat collection even during winter, cloudy days, or low-radiation conditions.

2.3 Pressurized “No-Water-in-Tube” Operating Mode

True All-Season, All-Climate Stability

Only special heat-transfer working fluid exists inside the heat pipe. No water flows through the evacuated tube itself. This unique structure:

· Completely avoids summer tube bursting

· Completely eliminates winter freezing damage

· Ensures stable operation from –50°C to above +40°C

· Fully prevents leakage, scaling, and explosion risks

This makes the heat pipe collector one of the most reliable solar thermal technologies for harsh climates.

2.4 Flexible Customization for Architectural Integration

Perfect Compatibility with Modern Buildings

The collector size, structure, and total heat-collecting area can be custom-engineered based on:

· Roof structure

· Façade orientation

· Load-bearing conditions

· Local solar resources

· Hot water demand

It can be installed on:

· Flat or pitched roofs

· Building façades

· Integrated canopy structures

For large commercial buildings, it can be combined with PV modules to build PV + Solar Thermal hybrid energy systems, significantly improving overall building energy utilization efficiency.

3. Technical Specifications

Type of collector		HPC182	HPC240	HPC298	HPC370	HPC442
outline dimension （mm）		1025×1920×131	1325×1920×131	1625×1920×131	2000×1920×131	2375×1920×131
Vacuum tube specifications		φ58×1800, the outer wall thickness is 2.0mm, and the inner wall thickness is 1.6mm
fin		3003 anti-rust aluminum, wall thickness 0.2mm, length 1620mm
Number of vacuum tubes		12	16	20	25	30
Total area (㎡)		1.82	2.4	2.98	3.7	4.42
Lighting area (㎡)		1.2	1.6	2	2.5	3
net weight （kg）		42	55	67	85	99
Working pressure (MPa)		0.6MPa
Interface size		Φ 22 light tubes
Number of interfaces		Two
Total heat loss coefficient		2.453W/（㎡·K）
Maximum operating temperature (℃)		120℃
Peak efficiency		0.724	0.724	0.724	0.724	0.724
rated efficiency ①		0.6	0.6	0.6	0.6	0.6
specified power （kW）②	400W/m²	0.2	0.27	0.33	0.42	0.5
	700W/m²	0.46	0.61	0.77	0.96	1.15
	1000W/m²	0.72	0.96	1.2	1.5	1.8
Gas volume (L)		0.8	1.04	1.27	1.57	1.86

4. Key Performance Highlights

· Thermal conductivity of the heat pipe reaches 99%

· Heat transfer begins within 5 seconds

· 3003 aluminum fins provide strong resistance to corrosion, salt fog, and long-term sunlight exposure

· Built-in thermal diode effect blocks reverse heat flow

· Winter heat exchange efficiency remains above 55%

· Stable operation even at –50°C without freezing or scaling risks

5. Why Soletks Solar Is a Reliable Heat Pipe Collector Supplier

Strong Core Technology Capability

Soletks Solar owns 117 patented technologies and proprietary solutions. It is one of the very few manufacturers globally capable of mass-producing both blue selective coating and black selective coating heat absorbers, with black coating occupying around 60% of the Chinese domestic market.

Fully Integrated Manufacturing System

The company operates 7 subsidiaries and 6 production bases, achieving complete industrial-chain coverage from material processing to system integration. Flat-plate solar thermal equipment production capacity reaches 7.0 GWth annually, and flat-plate collector shipments have ranked second globally for two consecutive years.

Intelligent Production Lines

High-level automation allows one solar collector to be completed every 55 seconds, ensuring rapid delivery while maintaining stable quality consistency.

Global Climate-Oriented Customized Solutions

Project designs can be customized for:

· Ultra-cold plateau regions

· Central and Western European heating markets

· Tropical and high-humidity Southeast Asia

· Industrial hot water and process heating systems

High Efficiency Heat Pipe Collector

6. FAQ

Q1: What defines a heat pipe solar collector?
It is a high-efficiency solar thermal device using evacuated tubes combined with sealed copper heat pipes to realize ultra-fast and efficient heat transfer.

Q2: How does the internal heat pipe function?
The working fluid evaporates after solar heating, rises to the condenser to release heat into the water system, then condenses and returns by gravity to repeat the cycle.

Q3: Why does it outperform flat plate collectors in cold climates?
Vacuum insulation reduces heat loss while phase-change heat transfer enables rapid energy transport under weak radiation and low temperatures.

Q4: Is year-round continuous operation possible?
Yes. The antifreeze working fluid and sealed heat pipe design allow stable operation even below freezing.

Q5: What routine maintenance is required?
Only periodic inspection of pipelines, seal performance, surface cleaning, and annual system efficiency checks are required.