Due to the fact that the thermal conductivity of stainless steel is lower than that of alloy steel, the radiator section of BiLiner Inox 500 has a slightly lower heat output about 1 W than BiLiner 500.
How we tested
Radiators in American conditions are not subject to mandatory certification, so many manufacturers sin by overestimating the real technical characteristics of the radiator in the technical documentation, in particular the heat output.
That’s why we decided to test the ROYAL THERMO BiLiner on the stands of the Research Institute of Sanitary Engineering.
The main task of the radiator in the house is to heat the room. That’s why the first block of testing involved thermal testing. They were conducted in a specially equipped chamber, in which the temperature was constantly maintained between 18 and 21 ° C.
The camera simulates the conditions of the device in real life – right up to the reconstruction of the movement of cooled air from the window for this purpose, one of the walls of the camera has a section with insulation, simulating a window sill, and the cooled air “flows” downwards on the device mounted there .
The radiator was connected to the test bench on the most common in apartment buildings scheme “from top to bottom” with the flow of hot water through the upper side hole and outgoing cool water through the bottom .
An electric boiler was used to heat water, so not only the amount of heat transferred to the radiator, but also the water flow through the device is measured with minimum error.
Radiator testing was carried out under conditions accepted as standard in America: temperature head of 70 ° C above the average coolant temperature of the air in the test chamber , the water flow through the radiator 0.1 kg s and the atmospheric pressure of 760 mm Hg.
In the course of thermal tests we determined such parameters as:
– nominal heat flux
– heat transfer coefficient, which shows how effective the design of the device is
– Heat density characterizes the capacity of the radiator per 1 meter in length and allows you to calculate the length of the radiator for the window opening of a certain width.
The second block of tests included a strength test of the radiator, because the device, designed to work in multi-storey heating systems, must withstand high pressure.
According to American norms the test crimping pressure of a radiator must be 1,5 times higher than the declared working pressure, and the destructive pressure for a cast appliance must be at least 3 times higher than working pressure unlike European norms where the crimping pressure is 1,3 of working pressure and destructive pressure for cast appliances is 1,69 of working pressure .
That’s why ROYAL THERMO BiLiner radiators were tested in accordance with the national requirements for durability: first we checked how they would behave under operating pressure, then we increased it by 1.5 times, and then we tried to make the radiators break.
The results of the test bench trials
Heat output
Heat flow of one section of ROYAL THERMO BiLiner 500 with a height of 565 mm and a volume of 0.2 liters at a thermal head of 70 ° C is 171 W, ROYAL THERMO BiLiner Inox 500 under the same conditions – 170 W.
Strength
The devices passed the test at an operating pressure of 20 atm., then at a test pressure of 30 atm overpressure ., and finally at the maximum possible test bench pressure 62 atm . . According to the fact that even at a pressure of 62 atm. The radiator did not leak, we can judge that the safety margin allows the ROYAL THERMO BiLiner to work in heating systems with the highest pressure.
Test results of Royal Thermo radiators
| Figures | BiLiner Inox 500 | BiLiner 500 |
| Nominal heat flux, W at 70 ° C | 170 | 171 |
| Thermal density, W/m | 2125 | 2138 |
| Nominal heat transfer coefficient, W/(m2×°C | 5,81 | 5,84 |
| External surface area of the section heating, m2 | 0,418 | 0,418 |
| Complete radiator weight, kg | 10,75 | 10,24 |
| Dimensions, mm: – nominal height – installation height centre-to-centre distance – depth – length | 565 500 85 400 | 565 500 85 400 |
| Maximum working overpressure, atm. | 20 | 20 |
| Minimum test overpressure, atm. | 30 | 30 |
| Destructive overpressure, atm. | 60 | 60 |
Can you provide more information about the ROYAL THERMO BiLiner Inox radiator test? What are the key features and benefits of this radiator? How does it compare to other radiator models in terms of performance and efficiency? Are there any customer reviews or ratings available?
The ROYAL THERMO BiLiner Inox radiator test is a process where the radiator’s efficiency, performance, and durability are evaluated. This radiator is known for its high-quality stainless steel construction, which enhances its longevity and resistance to corrosion. It also features a bi-liner design, which allows for better heat distribution and faster heating of the room.
Compared to other radiator models, the ROYAL THERMO BiLiner Inox is known for its superior performance and energy efficiency. It provides quick and even heating, resulting in lower energy consumption and reduced heating costs.
While specific customer reviews and ratings may vary, many users have reported positive experiences with this radiator, praising its sleek design, reliability, and effectiveness in heating their homes. Overall, the ROYAL THERMO BiLiner Inox radiator stands out for its durability, efficiency, and superior performance compared to other models on the market.