[Source: LED Engineering magazine's "good LED products," May issue of text / Xiong Hui Hao Hao Ping Shilong] LED fluorescent tube because of its advantages of high efficiency, long life, is widely used for office lighting, commercial lighting, garage lighting In other occasions, it is the representative of the application of L ED lighting products. At present, the replacement of fluorescent tubes with LED tubes has become an irresistible trend.
However, the price of LED tubes is still inferior compared to traditional fluorescent tubes. Many customers are interested in switching to LED products, but they are often hindered by higher procurement costs. In this case, a new business model emerged, namely the Energy Management Contract (EMC) model.
In this model, the supplier and the owner agree on the energy-saving indicators of the energy-saving project in the form of a contract. The supplier provides the necessary products and services to the owner to achieve the energy-saving goal, and the owner pays the supplier with energy-saving benefits until the payment expires, and the payment is made. The amount should cover the previous capital investment and reasonable profit of the supplier.
At present, the design of LED fluorescent tubes is still dominated by the one-time cost control idea, in order to give full play to the illuminance value of the lamp, and use a smaller number of light sources to achieve a given illuminance value. However, in the EMC model, the energy saving benefits are directly related to the energy saving ratio of the lamps, the higher the energy saving ratio of the lamps, and the longer the payback period, the more obvious the energy saving benefits, and the more profit the owners and suppliers receive.
Therefore, LED lamp design for EMC mode should shift from one-time cost control to long-term cost control to give full play to the main design concept of lamp light efficiency. Reduce the power consumption of the luminaire under the premise of satisfying the same illuminance, and finally find a balance between the material cost of the luminaire and the energy saving benefit, and maximize the value for the owner, fully reflecting the advantages of energy saving of the LED luminaire.
Based on this idea, this paper establishes a design model of energy-saving LED fluorescent tubes according to the characteristics of LED lamp beads. By comparing material cost and energy saving ratio, the best optical and electrical design schemes for EMC mode are calculated, and the details of the scheme are given according to the length of the payback period. According to this model, the LED tube can maximize the net energy saving. While further reducing the electricity bill for customers, it can increase the energy saving of suppliers and shorten the capital recovery period, which is conducive to the demonstration and promotion of the EMC model.
Modeling basis
The luminous efficiency h of the LED light source is a variable with respect to the input power P. When P is large, the total luminous flux F is higher, but h is lower; when P is smaller, the total luminous flux F is lower, but h is higher. Considering the actual lighting effect of the luminaire, the whole luminous flux is required to be greater than or equal to a rated value. In order to compress the material cost, the luminous flux of a single light source is usually close to or even greater than its rated value, thereby reducing the number of light sources and saving the cost of the luminaire.
With the promotion of LED lighting products, in addition to the traditional one-time purchase, sales models have also emerged, such as the energy management contract (EMC). In this way, since the distribution of revenue depends on the energy saving effect, the higher the luminous efficiency of the LED luminaire, the lower the power required to meet the rated illuminance, the more obvious the energy saving benefit, and the profit that can be brought to customers and suppliers. The more abundant it is.
At the same time, considering the capital investment of the suppliers in the early stage, the cost of the lamps needs to be well controlled, and finally the optimal balance between energy saving benefits and lamp material costs is achieved.
Generally, based on the characteristics of the semiconductor PN junction, the LED chip increases the probability of non-radiative recombination due to the rising junction temperature of the chip under large implantation conditions, and the internal quantum efficiency decreases, resulting in a decrease in light efficiency, and between the output luminous flux and the input power. Meet the following empirical function relationships:
F=AekP+B (1)
At present, LED fluorescent tubes generally use 3528 lamp beads, which are measured by the measured value of our 3528 lamp beads (samples are provided by Anhui Zhan Blu-ray, using Sanan photoelectric chip to measure the luminous flux and light effect with input power). The results are shown in Figure 1. The red cross star is the luminous flux measurement data, the red dashed line is the luminous flux empirical function fitting result, the blue cross star is the luminous effect measurement data, and the blue solid line is the fitting result. It can be seen that the luminous flux of the lamp is positively correlated with the input power, and the light effect is inversely related.
Unfinished , please refer to the May issue of Gaogong LED 's " LED Good Products" magazine.
However, the price of LED tubes is still inferior compared to traditional fluorescent tubes. Many customers are interested in switching to LED products, but they are often hindered by higher procurement costs. In this case, a new business model emerged, namely the Energy Management Contract (EMC) model.
In this model, the supplier and the owner agree on the energy-saving indicators of the energy-saving project in the form of a contract. The supplier provides the necessary products and services to the owner to achieve the energy-saving goal, and the owner pays the supplier with energy-saving benefits until the payment expires, and the payment is made. The amount should cover the previous capital investment and reasonable profit of the supplier.
At present, the design of LED fluorescent tubes is still dominated by the one-time cost control idea, in order to give full play to the illuminance value of the lamp, and use a smaller number of light sources to achieve a given illuminance value. However, in the EMC model, the energy saving benefits are directly related to the energy saving ratio of the lamps, the higher the energy saving ratio of the lamps, and the longer the payback period, the more obvious the energy saving benefits, and the more profit the owners and suppliers receive.
Therefore, LED lamp design for EMC mode should shift from one-time cost control to long-term cost control to give full play to the main design concept of lamp light efficiency. Reduce the power consumption of the luminaire under the premise of satisfying the same illuminance, and finally find a balance between the material cost of the luminaire and the energy saving benefit, and maximize the value for the owner, fully reflecting the advantages of energy saving of the LED luminaire.
Based on this idea, this paper establishes a design model of energy-saving LED fluorescent tubes according to the characteristics of LED lamp beads. By comparing material cost and energy saving ratio, the best optical and electrical design schemes for EMC mode are calculated, and the details of the scheme are given according to the length of the payback period. According to this model, the LED tube can maximize the net energy saving. While further reducing the electricity bill for customers, it can increase the energy saving of suppliers and shorten the capital recovery period, which is conducive to the demonstration and promotion of the EMC model.
Modeling basis
The luminous efficiency h of the LED light source is a variable with respect to the input power P. When P is large, the total luminous flux F is higher, but h is lower; when P is smaller, the total luminous flux F is lower, but h is higher. Considering the actual lighting effect of the luminaire, the whole luminous flux is required to be greater than or equal to a rated value. In order to compress the material cost, the luminous flux of a single light source is usually close to or even greater than its rated value, thereby reducing the number of light sources and saving the cost of the luminaire.
With the promotion of LED lighting products, in addition to the traditional one-time purchase, sales models have also emerged, such as the energy management contract (EMC). In this way, since the distribution of revenue depends on the energy saving effect, the higher the luminous efficiency of the LED luminaire, the lower the power required to meet the rated illuminance, the more obvious the energy saving benefit, and the profit that can be brought to customers and suppliers. The more abundant it is.
At the same time, considering the capital investment of the suppliers in the early stage, the cost of the lamps needs to be well controlled, and finally the optimal balance between energy saving benefits and lamp material costs is achieved.
Generally, based on the characteristics of the semiconductor PN junction, the LED chip increases the probability of non-radiative recombination due to the rising junction temperature of the chip under large implantation conditions, and the internal quantum efficiency decreases, resulting in a decrease in light efficiency, and between the output luminous flux and the input power. Meet the following empirical function relationships:
F=AekP+B (1)
At present, LED fluorescent tubes generally use 3528 lamp beads, which are measured by the measured value of our 3528 lamp beads (samples are provided by Anhui Zhan Blu-ray, using Sanan photoelectric chip to measure the luminous flux and light effect with input power). The results are shown in Figure 1. The red cross star is the luminous flux measurement data, the red dashed line is the luminous flux empirical function fitting result, the blue cross star is the luminous effect measurement data, and the blue solid line is the fitting result. It can be seen that the luminous flux of the lamp is positively correlated with the input power, and the light effect is inversely related.
Unfinished , please refer to the May issue of Gaogong LED 's " LED Good Products" magazine.
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