Flat Plate Solar Collector System

I. Product Introduction

The flat plate solar collector system (Flat Plate Solar Collector System) is a comprehensive solar hot water solution centered around flat plate collectors, integrating heat storage and intelligent control. This system adopts a modular design, consisting of an efficient flat plate collector array, enamel inner tank water storage tank, circulation pump station, and intelligent controller. It is widely used in residential homes, villas, hotels, schools, hospitals, factory staff dormitories, and swimming pool constant temperature heating, etc. 

The flat plate collector uses a high-strength aluminum alloy frame and ultra-clear low-iron tempered glass. The interior features a full copper flow channel, and the surface is covered with highly selective heat-absorbing coatings (blue titanium film/black chrome). The collector's heat collection efficiency is over 95%, with an emissivity lower than 5%. The overall thickness of the collector is only 80mm, and its appearance is simple and modern. It can be directly replaced with building railings, roof tiles or curtain walls, truly achieving the integration of solar energy and architecture. In addition, the system supports multi-energy complementarity (electric heating, heat pump, gas boiler), meeting the all-day water heating needs. 

II. Technical Parameter Table

Item name: flat plate solar collector system 

Note : ① Rated efficiency: The total irradiance on the daylighting surface of the collector is 1000W/㎡, and the temperature difference between the average temperature of the collector and the ambient air temperature is 50°C. Calculate the efficiency value of the solar collector according to the instantaneous efficiency equation of the collector's daylighting area.

② Rated power: The total irradiance of the collector lighting plane is 1000w/㎡, and the collector power when the temperature difference between the average collector temperature and the ambient air temperature is 50 ° C is equal to the product of the rated efficiency and the day lighting area and 1000W/㎡.

III. Working Principle

The flat-panel solar collector system adopts the principle of forced circulation indirect heat exchange:

1. Heat Collection: Sunlight passes through the low-iron tempered glass and is absorbed by the heat-absorbing coating, converting it into thermal energy, which heats the anti-freezing medium in the flow path.

2. Temperature Difference Circulation: When the temperature difference between the outlet of the collector and the bottom of the water tank is ≥ 5 - 8℃, the controller activates the circulation pump, pumping the high-temperature medium into the water tank to replace the heat exchanger tubes. The heat is transferred through the tube wall to the domestic water in the water tank, and the cooled medium returns to the collector for re-heating.

3. Pressure-Resisting Water Supply: The water tank is directly connected to the tap water, and when the hot water tap is turned on, cold water is pushed into the bottom of the water tank, and hot water flows out from the top, maintaining a constant pressure.

4. Auxiliary Heating: On rainy days or when there is insufficient heat, the system automatically starts electric heating or links to external heat sources to ensure continuous hot water supply 24 hours a day. 

IV. Product Advantages

1. Pressure-bearing operation, comfortable and stable

The Flat Plate Solar Collector System adopts a fully enclosed pressure-bearing design, with the water pressure at the outlet being the same as that of the cold water. This eliminates the drawbacks of traditional solar energy, such as "slow trickle and inconsistent temperature". 

2. Flat plate collectors, elegant and efficient

The flat plate has a smooth surface and can be embedded in the roof or balcony without altering the architectural style. They remain efficient even in low-light conditions, and do not burst the tubes, accumulate dust, or require frequent cleaning. 

3. Intelligent Control, Energy Saving and Convenient Operation

The intelligent controller features functions such as temperature difference circulation, anti-freezing protection, anti-dry-burning, and timed heating. An optional Wi-Fi module is available, allowing remote monitoring of water temperature and setting of auxiliary heating time via mobile phone. 

4. Modular design, flexible expansion

The collector can be connected in parallel in multiple groups, and the water tank can be connected in series in multiple units. This enables it to easily meet hot water demands ranging from 2 people to 200 people. It is highly suitable for engineering contractors to undertake various projects. 

5. Multi-functional complementarity, 24/7 operation

The system is equipped with electric heating/heat pump/gas interface. Solar energy is given priority. In case of insufficient energy, it will automatically switch to auxiliary energy sources to achieve the lowest operating cost. 

V. Factory Advantages

Our company has been dedicated to the research and manufacturing of flat-panel solar collector systems for 15 years and is a leading OEM/ODM supplier in the industry. 

1. Comprehensive qualifications: Certified by ISO9001, ISO14001, Solar Keymark, CE, CB, etc. The products are popular in Europe, Australia, the Middle East, and Southeast Asia. 

2. Core production: We have a fully automated flat plate collector welding line, an enamel inner tank sintering furnace, and a foaming production line. Key components are produced independently, ensuring controllable quality and stable delivery schedules. 

3. R&D capabilities: Collaborate with universities to establish a thermal performance laboratory, which enables the optimization of collector designs based on different latitudes and climatic conditions. 

4. Customized Services: Supports full-dimensional customization of collector size, water tank volume, exterior color, control logic, etc., to meet the special requirements of engineering projects. 

5. After-sales Guarantee: Offer a 5-year whole machine warranty, a 24-hour technical hotline, and installation training for distributors. 

VI. List of Accessories

Flat plate collectors (various sets, configured as needed) 

Intelligent temperature difference controller (with sensor) 

Circulation pump (with stainless steel pump body) 

Pipeline connection (several groups, configured as needed) 

Installation brackets (hot-dip galvanized/aluminum alloy) 

VII. Installation Precautions

1. Orientation and Angle: The collector should face due south or 15° west of south. The inclination angle should be ±10° from the local latitude. Avoid obstructions such as buildings and trees. 

2. Pipeline Design: Multiple sets of collectors are connected in parallel in the same flow path to ensure flow balance. The circulation pipeline needs to be insulated, with a thickness of ≥ 25mm. An electric heating tape is installed on the outdoor pipeline to prevent freezing. 

3. Water tank placement: The water tank should be placed indoors or in the equipment room. The ground load capacity must be able to support the full load weight (approximately 350kg for a 300L water tank). A drainage floor drain should be reserved. 

4. Antifreeze addition: In cold regions, special antifreeze must be added. The concentration should be adjusted according to the local minimum temperature. Regularly check the liquid level and pH value after the system is running. 

5. Electrical Safety: The power supply for the controller and the water pump should be routed separately. Install an earth leakage protection switch and ensure reliable grounding. 

6. Pressure Test: After installation, a 1.2 MPa water pressure test shall be conducted. The system must remain under pressure for 30 minutes without any leakage before it can be put into operation. 

VIII. Application Cases

1. Villa: Installed 6m² flat plate collectors + 300L enamel inner tank water tank, meeting the daily bathing and kitchen hot water needs for a family of 5. Annual electricity savings are approximately 2,200 yuan. The system has been running for 4 years without any faults. 

2. Hotel: Utilizing 20 sets of flat plate collectors and two 500L water tanks connected in parallel, it provides constant pressure hot water for 16 guest rooms. In summer, it is completely free of charge. In winter, it is combined with air-source heat pumps, saving approximately 60,000 yuan in energy costs annually. 

3. Dormitory: Installed a 40m² solar collector array and 3 300L water tanks, which can meet the shower needs of 120 employees. The investment payback period is only 1.8 years. 

4. Swimming Pool: Equipped with 8 sets of flat plate collectors for a 50m³ private swimming pool. The swimming season is extended by 3 months, and the water temperature remains consistently between 26-30℃. 

IX. Development Trends

1. Flat-panel technology replacing vacuum tubes: Flat-panel solar collectors, due to their advantages such as safety, aesthetics, ease of maintenance, and resistance to hail, have been steadily increasing their share in new residential and commercial projects. 

2. Intelligence and Internet of Things: Functions such as remote monitoring, fault diagnosis, and electricity price linkage are gradually integrated. Users can manage the hot water system through their mobile phones. 

3. Multi-functional Integration System: The "light-storage-heat" integrated system combining solar energy, heat pumps, and energy storage has become the core solution for achieving zero-carbon energy in future households. 

4. Integrated building photovoltaic/thermal energy: The flat plate collectors are deeply integrated with photovoltaic modules and building facades, shifting from an "add-on" approach to a "constructive" one. 

Summary: The Flat Plate Solar Collector System, with its highly efficient flat solar collectors, corrosion-resistant enamel inner tanks, pressure-bearing constant-temperature water supply, and intelligent control features, has become the best choice for modern buildings and industrial enterprises to achieve energy-saving hot water. We sincerely invite all distributors and engineers across the country to join hands and work together to promote the application of green energy! 

Contact us immediately to obtain the system solution and cooperation policies!