Testing and certification of elevator energy effic

2022-08-06
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Analysis of elevator energy efficiency testing and certification under the trend of green energy conservation the latest research data show that building energy consumption accounts for about 40% of the global total energy consumption, which can be said to account for a large proportion. With the continuous growth of the total construction volume, there is a sharp upward trend. Elevator is one of the necessary vertical transportation tools for modern high-rise buildings. Although its energy consumption generally accounts for only about 3% to 8% of the total building energy consumption, elevator energy consumption has a high energy-saving potential and room for improvement. As countries around the world pay more and more attention to environmental issues, energy conservation and emission reduction efforts are bound to be greater and greater. How to reasonably and effectively save and evaluate elevator energy efficiency is gradually put on the agenda by elevator manufacturers and owners. Countries have also begun to study and formulate corresponding elevator energy efficiency evaluation standards and specifications

at present, VDI 4707 part standard developed by the German Association of engineers is widely used internationally to evaluate the energy efficiency of elevators. This standard is based on the test standard comprehensively planned and evaluated by the Swiss energy efficiency agency after the test and evaluation of 33 elevators from eight major elevator manufacturers in Europe in 2005, and was officially promulgated in March 2009. The standard is applicable to the energy efficiency evaluation and classification of new passenger elevators and freight elevators, and also applicable to the confirmation of energy efficiency of existing elevators. According to the energy required for elevator operation and standby, the energy efficiency of the elevator is divided into seven levels, which are marked by seven color labels from a to g. among them, A-level green represents the best energy efficiency of the elevator, and g-level red represents that the energy efficiency of the elevator needs to be improved

the steps of energy efficiency test according to VDI 4707 Part1 standard are shown in figure 588.4, which is divided into six steps. First of all, it is necessary to evaluate the use category (Category 1 to category 5) of the elevator to be tested, which is related to the type of the building where the elevator is located, the purpose and operation frequency of the elevator. At the same time, it can be comprehensively judged by referring to the relevant operation data provided by the elevator manufacturer and the actual operation statistical data of the building. It is very important to evaluate the energy efficiency of elevators that each use category corresponds to a specific daily average running time and daily average standby time, and these two data are also the basis for subsequent calculations. Next, it is necessary to test the energy consumption used by the elevator in standby and operation on site under real operating conditions. Among them, the standby energy consumption needs to be determined by 5 minutes after the end of the last operation. The operation energy consumption usually needs to measure and record the energy consumption value of at least 3 operations as the reference operation value, and then take the average value as the final result. After the relevant calculation of the above data, the required parameters can be obtained and the energy efficiency grade of the elevator can be determined. Finally, the certification authority will issue the elevator energy efficiency certificate. It should be noted here that the energy efficiency evaluation through VDI 4707 Part1 standard is for a single elevator. Even the two elevators with completely related models and configurations have completely different energy efficiency due to different site installation conditions and use frequencies. They need to be tested and issued energy efficiency certificates respectively

TUV Rheinland, as the world's authoritative third-party testing and certification agency, has taken the lead in carrying out elevator energy efficiency testing and certification in Asia since 2008. The tested elevator application fields include landmark buildings, international commercial buildings, high-rise residential buildings, etc. Up to now, nearly 50 elevator energy efficiency certificates have been tested and certified by TUV Rheinland, Germany, even more than the 33 certificates tested and issued by Swiss energy efficiency agency in 2005. In addition, the Industrial Service Department of TUV Rheinland in Germany has also established a diagnostic database of local characteristics of elevator energy efficiency in Greater China, and has accumulated rich practical experience in the field of elevator energy efficiency testing

TUV in Rheinland, Germany can not only provide services for the energy efficiency test of elevators, but also provide 2.1 proprietary and unique computer control system to issue elevator energy efficiency improvement scheme according to the test results. For example, the elevator in a 14 storey residential building once tested by TUV in Rhine, Germany, has a service category of 2. The test results show that the standby energy demand level of the elevator is level D, the operating energy demand level is level B, and the overall energy efficiency level is level C. After carefully analyzing the test record data and combining the operation status of the elevator, TUV Rheinland put forward a solution to improve the energy efficiency of the elevator and made rectification. After the retest, the standby energy demand level of the elevator was increased by two levels to level B, and 67% of the energy consumption was saved; The operation energy demand level is still maintained at level B, but the energy consumption is saved by 10%; As for the final energy, the pre tension will fluctuate greatly. The efficiency level will be raised to level B and 48% of the energy consumption will be saved, that is, the annual power consumption is only 52% of the original. After the rectification, it not only saves considerable power consumption for the elevator owner, but also significantly reduces the carbon dioxide emission of the elevator. If the whole community and city have similar improvement effects, it will bring great contribution to energy conservation and carbon reduction to the whole society

although VDI 4707 Part1 is still a non mandatory standard, it may become a mandatory specification in the future. TUV in Rhine, Germany suggests that elevator manufacturers and building owners who have not paid attention to VDI 4707 standard can pay more attention. (end)

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