300L Evacuated Tube Solar Geyser

Heat Pipe Solar Water Heater

In the centralized hot water supply sectors of hotels, schools, hospitals, and high-end residences, the Heat Pipe Solar Water Heater (Heat Pipe Solar Water Heater) is becoming the preferred solution for an increasing number of projects due to its superior characteristics such as high heat collection efficiency, strong anti-freezing performance, and stable and reliable operation. Our company has launched a new generation of heat pipe solar water heating system - the collector uses efficient heat pipe vacuum tube heat collection technology, and the storage water tank offers dual material options of SUS304 and SUS316L stainless steel, with capacities ranging from 100L to 300L and supporting large-capacity customization, fully meeting the differentiated needs of various project scenarios.

I. Heat Pipe Collector vs Flat Plate Collector - Advantage Comparison

The Heat Pipe Solar Water Heater uses a heat pipe vacuum tube collector as the heat collection element, consisting of three core components: vacuum glass tubes, metal heat-absorbing fins, and heat pipes. Sunlight passes through the high-transparency vacuum tubes and is absorbed by the highly selective absorption coating on the metal heat-absorbing fins. The light energy is converted into heat and quickly transferred to the evaporating end of the heat pipe, where the low-boiling-point working fluid rapidly vaporizes and rises to the condensing end to release heat - forming a continuous and efficient heat transfer process.

Research data shows that the solar guarantee rate and system efficiency of the heat pipe vacuum tube collector are superior to those of the flat plate collector. The highest efficiency that the flat plate collector can achieve is slightly higher than that of the heat pipe vacuum tube collector, but as the heat collection temperature increases, its heat loss increases and efficiency decreases; while the heat collection efficiency of the heat pipe vacuum tube collector fluctuates less and remains at a relatively high level.

Comparison Table of Heat Pipe Collector vs Flat Plate Collector

Summary: Heat pipe collectors maintain stable efficiency with minimal heat loss even at high operating temperatures, and they offer superior freeze protection. Choose heat pipe collectors for cold climates and high-altitude projects; choose flat plate collectors for warm regions where aesthetics and building integration are priorities.

Parameter table:

II. Comparison Table of SUS304 Stainless Steel vs SUS316L Stainless Steel Water Tanks

Selection Recommendation Preferred for cold regions, high-altitude areas, and projects seeking long-term stable operation Preferred for warm regions, projects with high requirements for aesthetics and building integration 316L has superior high-temperature performance, capable of being used in hot water storage tanks at temperatures below 120℃ for a long period, with a lifespan of up to 20 years. However, its price is 30%-50% higher than that of 304.

SUS304 Stainless Steel vs. SUS316L Stainless Steel Tank

Summary: SUS304 provides sufficient corrosion resistance for most inland municipal water applications at a moderate cost. SUS316L, with its molybdenum content, offers superior protection against chloride‑ion corrosion and is ideal for aggressive environments. Choose 304 for inland areas and cost sensitivity; choose 316L for coastal regions, high‑salinity conditions, or high‑temperature applications.

Working Principle of Heat Pipe Solar Water Heater:

III. Flexible Capacity Customization - Standard Specifications of 100L-300L, Supports Customization of Large Capacity

The product offers standard capacity specifications of 100L, 150L, 200L, and 300L to meet the daily hot water needs of small and medium-sized commercial and household scenarios. For large centralized heating projects in hotels, schools, and hospitals, customizations to larger capacities are supported, flexibly matching the water demand of different scale projects.

IV. Six Core Product Advantages

Heat Pipe Efficient Heat Collection - Heat pipe heat transfer method has a high thermal conductivity and stable heat collection efficiency, with a peak heat efficiency of over 78%

Super Anti-Freeze Performance - There is no water flow inside the vacuum tube, which does not freeze at -25℃ to -40℃, making it the preferred choice for northern cold regions

Dual Water Tank Material Options - SUS304 (high cost-effectiveness) and SUS316L (strong corrosion resistance) can be selected as needed

Single Tube Maintenance Without Shutdown - A single vacuum tube break can be replaced separately, and the system does not need to be shut down or drained the water line

Pressure-Resistant Operation - Compatible with closed pressure heating systems, with strong and stable water output pressure

Flexible Capacity Customization - Standard Specifications of 100L-300L, Supports Customization of Large Capacity

V. Factory Advantages

As a professional manufacturer in the field of heat pipe solar water heaters, our company has a complete industrial chain layout from heat pipe vacuum tube production to system assembly:

Vertical Integration Production: The company has achieved vertical integration from vacuum glass tube production to collector assembly and water tank manufacturing. Every step is under strict monitoring to ensure each heat pipe vacuum tube has consistent high performance and long lifespan.

Dual Water Tank Material Production Capacity: The company has a complete production line for both SUS304 and SUS316L stainless steel water tanks. The inner liner is welded by automatic argon arc welding, with stable and reliable welding quality. 316L water tanks are especially suitable for coastal and high-salt fog environment projects.

International Authority Certification: The products have passed Solar Keymark (EU), CE (EU), ISO 9001, etc. international authority certifications. The Solar Keymark certification is the authoritative pass for solar thermal utilization products entering the EU market.

OEM/ODM Customization Services: Provide comprehensive OEM/ODM customization services - heat pipe quantity, water tank capacity (100L-300L and larger), inner liner material (304/316L stainless steel), appearance color can be customized according to customer project specifications. Support brand/LOGO customization.

One-stop service: From product design, production and manufacturing to export customs declaration, clearance, and maritime transportation, we provide a full-process one-stop service. The delivery cycle is 15-25 working days. Full container or loose cargo container consolidation is available.

VI. Application Cases

Case 1: Central Hot Water System for Hotels

A business hotel adopts a hot water system using heat pipe collectors and pressure vessels. It is equipped with 51 sets of heat pipe collectors and multiple pressure storage water tanks. The system achieves ±1℃ temperature fluctuation control, with peak water supply delay of ≤3 seconds, and the solar energy utilization rate reaches 65%. The overall operating cost is reduced by 40%-80% compared to traditional systems.

Case 2: Central Hot Water System for Schools

A school adopts the 5825 heat pipe collector clean hot water project, with a daily production of 58 tons of clean hot water. The metal heat pipe collectors are safe, frost-proof, and explosion-proof, achieving hot water demand while saving energy and reducing carbon emissions.

Case 3: Large-scale Public Building Hot Water Project

A large educational base adopts a heat pipe solar collector system. The heat collection efficiency is high, and the working temperature can reach 40-120℃. The system is widely used in heating and hot water supply and is widely applicable. It can save a large amount of conventional energy annually.

VII. Common FAQs

Q1: Which is better, heat pipe solar water heaters or flat plate solar water heaters?

Each has its advantages. The advantage of heat pipe type is excellent anti-freezing performance (-25℃ to -40℃ without cracking), stable efficiency, single pipe replaceable for easy maintenance, especially suitable for northern cold regions and high-altitude areas. The advantage of flat plate type is its beautiful structure, suitable for building integration, and quick heat startup. It is more suitable for warm regions in the south. Projects in cold regions are recommended to prioritize heat pipe type.

Q2: What are the differences between 304 stainless steel water tanks and 316 stainless steel water tanks? How should one choose?

304 is cost-effective and can last stably for 15-20 years in inland municipal tap water environments. 316L contains molybdenum, significantly improving its resistance to chloride ion corrosion, especially suitable for coastal high-salt spray areas, high chlorine ion content water, or water storage temperatures above 60℃ for a long time. It has a lifespan of 20 years or more and costs 30%-50% more than 304. In inland areas, choose 304; for coastal/high salt spray/high temperature environments, directly upgrade to 316.

Q3: Is a capacity of 100L-300L sufficient? Can larger capacity be customized?

100L-300L are standard specifications, suitable for small and medium-sized commercial and household scenarios. For large centralized heating projects such as hotels, schools, and hospitals, customizing to larger capacities is supported. The specific capacity is designed precisely based on the daily water consumption and peak water demand of the project.

Q4: What should be done if a heat pipe vacuum tube is damaged? Will it affect the entire system?

No. The heat pipe collector adopts a dry insertion design - a single vacuum tube damage can be replaced individually, and the system does not require shutdown or water drainage. This design greatly reduces maintenance costs and downtime losses.

Q5: What if solar energy is insufficient on rainy days or in winter?

Heat pipe vacuum tube collectors still have good heat collection performance in weak light conditions. The system also supports a dual heat source mode of "solar energy priority + auxiliary heat source supplementary heating", automatically supplementing heat by the auxiliary heat source during rainy days or winter to ensure constant temperature hot water supply throughout the day.

Q6: Does the system require dedicated maintenance?

No. The system is equipped with a fully automatic intelligent control system, running automatically, switching heat sources automatically, and requiring no on-site personnel. Daily maintenance only involves checking the cleanliness of the vacuum tubes and the sealing of the pipelines. The maintenance cost is extremely low.

VIII. Selection Decision Reference

Project Conditions Recommended Collector Type Recommended Water Tank Material

Selection Decision Matrix (Collector Type & Tank Material)

Contact us immediately to obtain the exclusive solution for heat pipe solar water heaters!

Whether you are a hotel engineering contractor, school manager， hospital purchasing officer， real estate developer or an investor in new energy projects， we are willing to provide you with professional consultation and customized solutions for heat pipe solar water heaters - heat pipe collectors and flat plate collectors are selected as needed SUS304 and SUS316L stainless steel water tanks are matched as needed， 100L-300L standard and larger capacity customization to meet different project budgets and performance requirements.

Send the inquiry and obtain the exclusive solution!