Pressurized Evacuated Tube Solar Thermal Collectors For Hot Water Heating System
Heat Pipe Evacuated Tube Solar Collector The Heat Pipe Evacuated Tube Solar Collector is designed to provide efficient solar heat collection for hot water and heating systems. By combining evacuated tube technology with sealed heat pipes, it transfers solar energy rapidly while keeping water outside ...
Evacuated Tube Solar Thermal Collectors
,Heating System Solar Thermal Collectors
,Hot Water Pressurized Solar Collector
Heat Pipe Evacuated Tube Solar Collector
The Heat Pipe Evacuated Tube Solar Collector is designed to provide efficient solar heat collection for hot water and heating systems. By combining evacuated tube technology with sealed heat pipes, it transfers solar energy rapidly while keeping water outside the heat pipe itself.
This construction offers a practical solution for solar thermal systems where freeze resistance, corrosion protection and reliable heat transfer are important.

Sealed Heat Pipe Structure
Each heat pipe contains a working fluid inside a sealed metal circuit. When solar energy heats the lower part of the tube, the working fluid changes into vapor and moves toward the condenser.
Heat is released at the condenser and transferred to the circulating water or heat-transfer medium. The condensed working fluid then returns to the lower section, creating a continuous thermal cycle.
Because the heat pipe is sealed, there is no direct water flow through the solar collection tube.
Reliable in Cold and Hot Conditions
The water-free heat pipe design helps protect the collector against common problems associated with direct water circulation, including freezing, bursting and leakage.
This makes the collector suitable for year-round solar thermal operation and particularly useful for installations exposed to low outdoor temperatures.
The heat-transfer medium can also be selected according to local climate and system operating conditions.
Fast and Stable Heat Transfer
Solar heat is collected by the evacuated tubes and transferred through 3003 aluminum fins toward the high-purity copper heat-transfer channels.
The use of highly conductive metal components creates an efficient path for moving thermal energy from the collector to the system. Silver-copper welding provides strong connections between key components and supports long-term structural reliability.
Lower Maintenance Requirements
The sealed heat pipe circuit reduces direct exposure of the internal heat-transfer components to system water. This helps minimize concerns related to water quality, corrosion and scaling.
For commercial solar thermal installations, the result is a collector that can operate with less routine attention while maintaining a dependable heat-transfer process.
Flexible for Different Solar Thermal Systems
The collector can be configured for different installation requirements and project sizes. Its structure, dimensions and arrangement can be customized according to the application.
It can be incorporated into systems providing:
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Domestic hot water
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Commercial hot water
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Building heating
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Swimming pool heating
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Centralized solar thermal energy
Commercial and Engineering Applications
The Heat Pipe Solar Collector is suitable for a broad range of projects, including:
Hotels and Resorts
Solar-assisted hot water for guest rooms and facility operations.
Schools and Universities
Centralized hot water systems for campuses and educational facilities.
Hospitals
Solar thermal systems where stable hot water supply is required.
Office and Public Buildings
Renewable heat for centralized hot water and heating applications.
Swimming Pools
Solar-assisted thermal energy for maintaining pool water temperature.
Industrial Projects
Solar thermal systems for industrial and energy-saving applications.
The Heat Pipe Evacuated Tube Solar Collector is suitable for solar thermal distributors, EPC contractors, system integrators and project developers seeking a durable and adaptable solution for commercial hot water and heating systems.


| Collector Model | HPC318 | HPC395 | HPC472 |
| Dimensions (mm) | 1720×1936×156 | 2120×1936×156 | 2520×1936×156 |
| Vacuum Tube Spec | φ58×1800 | φ58×1800 | φ58×1800 |
| Vacuum Tube Quantity | 20 | 25 | 30 |
| Gross Area (m²) | 3.18 | 3.95 | 4.72 |
| Aperture Area (m²) | 2.00 | 2.50 | 3.00 |
| Net Weight (kg) | 70 | 88 | 104 |
| Working Pressure (MPa) | 0.6 MPa | 0.6 MPa | 0.6 MPa |
| Connection Size | G3/4" Thread | G3/4" Thread | G3/4" Thread |
| Connection Quantity | 2 | 2 | 2 |
| Overall Heat Loss Coeff. [W/(m²·K)] | 2.45 | 2.45 | 2.45 |
| Max. Operating Temperature (°C) | 120°C | 120°C | 120°C |
| Peak Efficiency | 0.72 | 0.72 | 0.72 |
| Rated Efficiency ① | 0.60 | 0.60 | 0.60 |
| Rated Power (kW) ② (400W/m²) | 0.33 | 0.42 | 0.50 |
| Rated Power (kW) ② (700W/m²) | 0.77 | 0.96 | 1.65 |
| Rated Power (kW) ② (1000W/m²) | 1.20 | 1.50 | 1.80 |
| Fluid Capacity (L) | 1.35 | 1.67 | 1.98 |
| Notes: 1. Rated Efficiency: Based on total solar irradiance of 1000 W/m² on the absorber surface, with an average temperature difference of 50°C between the collector and ambient air. | |||
| 2.Rated Output: Refers to thermal output at irradiance levels of 400, 700, and 1000 W/m², under a temperature difference of 50°C, calculated as: Rated efficiency × Absorber area × Solar irradiance. | |||