How Do Solimpeks TSM Thermosiphonic Systems Work?
Solar hot water systems are not only about a collector capturing sunlight. For an efficient and reliable system, the collector, tank and heat transfer structure must work together correctly. Solimpeks TSM Series integrates these three core components to produce hygienic, efficient and low-maintenance hot water from solar energy. The working logic of the TSM Series differs from conventional hot water storage systems. In this system, domestic water is not stored directly inside the tank. The water inside the tank is static accumulation water that only stores heat collected from the sun. Domestic water is heated instantly when needed by passing through the AISI 316L stainless steel serpentine inside the tank.
This structure makes the TSM system stand out in terms of both hygiene and maintenance convenience.
What Is the TSM System?
Solimpeks TSM Series is a thermosiphonic solar hot water system operating with the principle of natural circulation. In thermosiphonic operation, the heated fluid moves upward, while the cooled fluid returns downward. This allows the system to operate through natural circulation without requiring an additional circulation pump.
The basic philosophy of the TSM system is to store solar energy first as heat inside the tank and then transfer this heat to domestic water only when it is needed. In other words, the system includes two separate hydraulic structures:
- The heat transfer loop operating between the collector and the tank.
- The clean domestic water line that becomes active when the user opens a hot water tap.
Thanks to this separation, the water inside the tank and the domestic water do not mix.
How Does the System Work from Start to Finish?
The working process of the TSM system starts with the solar collectors. Sunlight reaching the collector surface is absorbed by the selective absorber plate and converted into thermal energy. This heat is transferred to the system fluid through the tubes inside the collector.
The heated fluid naturally rises and moves toward the tank located at the upper part of the system. Once it reaches the tank, it transfers its heat to the static accumulation water. The cooled fluid then returns to the collector. This cycle continues naturally as long as solar radiation is available.
The heat accumulated inside the tank is stored until domestic hot water is required. When the user opens a hot water tap, cold mains water enters the AISI 316L stainless steel serpentine inside the tank. As the water passes through the serpentine, it absorbs heat from the hot static water surrounding it and is heated instantly.
As a result, hot water reaches the point of use directly, without being stored inside the tank.
What Does the Solar Collector Do?
The solar collector is the energy collection center of the TSM system. Its function is to convert solar radiation into thermal energy and transfer this heat into the system. A flat-plate solar collector consists of multiple technical layers. Each layer directly contributes to system performance. The tempered glass cover allows sunlight to enter the collector. It also protects the collector against external conditions such as wind, rain and impact.
The selective absorber plate is the main surface that absorbs solar radiation. This plate converts a high percentage of incoming solar energy into heat.
The copper tubes transfer heat from the absorber plate to the system fluid. Copper’s high thermal conductivity provides an important advantage for efficient heat transfer.
The high-density insulation reduces heat losses from the rear side of the collector. This helps the collected solar energy remain inside the system more efficiently.
The outer frame enhances the collector’s structural strength and ensures a long service life. The collector’s efficiency directly affects the system’s overall hot water performance, as the collector is the primary source of heat transferred to the storage tank.
How Does the Tank Work?
The TSM tank operates with a different logic than conventional hot water tanks. In conventional systems, domestic water may be stored directly inside the tank. In the TSM system, domestic water is not stored in the tank; the tank contains only static accumulation water that stores heat. This static water stores the energy coming from the solar collectors. Throughout the day, heat gained from the sun is accumulated inside the tank and transferred to domestic water when needed. With this structure, the tank works not only as a water vessel but also as the thermal energy center of the system. Heat is stored in the tank, while domestic water benefits from this heat through the serpentine.
What Does the AISI 316L Stainless Steel Serpentine Do?
One of the most important components of the TSM system is the AISI 316L stainless steel serpentine located inside the tank. The serpentine is a spiral pipe structure through which domestic water flows.
When a hot water tap is opened, cold mains water enters the serpentine. Because the serpentine is surrounded by the hot static water inside the tank, the domestic water heats up quickly. As the water moves through the serpentine, it benefits from the large heat transfer surface and reaches the point of use as hot water.
In this system, domestic water does not remain stored inside the tank. This means the hot water delivered to the user is fresh mains water heated on demand. This provides an important hygiene advantage.
The AISI 316L stainless steel structure also supports corrosion resistance, long service life and hygienic operation.
Hygiene Advantage of the TSM System
One of the key hygiene advantages of the TSM system is that domestic water does not remain stored inside the tank. In conventional storage systems, hot water can remain inside the tank for long periods. This may increase hygiene risks associated with stagnant water.
In the TSM system, domestic water passes through the serpentine only when needed and is heated instantly. The static water inside the tank and the domestic water do not mix.
This working principle is based on the idea of “fresh hot water on demand.”
Why Is the Maintenance Requirement Lower?
In the TSM system, the water inside the tank is not continuously renewed, so oxygen intake is limited. This reduces the corrosion cycle. Domestic water, on the other hand, moves only through the stainless steel serpentine. For this reason, the TSM system minimizes maintenance requirements commonly seen in conventional systems, such as magnesium anode replacement. The simpler hydraulic structure provides easier operation and lower service needs over the long term. How Do the Collector, Tank and Serpentine Work Together?
The success of the TSM system depends on the coordinated operation of three main components.
✓ The collector captures solar energy and converts it into heat.
✓ The tank stores this heat in static accumulation water.
✓ The serpentine heats domestic water instantly when needed.
This division of functions allows the system to operate both efficiently and hygienically. Domestic water remains fresh because it is not stored in the tank, while solar heat is preserved inside the tank until it is required.
Conclusion
Solimpeks TSM Series treats solar hot water production as an integrated system built around the collector, tank and stainless steel serpentine.
Thanks to this working principle, the TSM Series combines hygienic hot water, low maintenance requirements, efficient energy use and long-lasting system performance.
For residential, summer house and project applications seeking maximum benefit from solar energy, Solimpeks TSM Series offers a strong, sustainable and user-friendly hot water solution.
Core Working Logic: The collector captures heat, the tank stores it, and the AISI 316L serpentine heats domestic water instantly on demand.