A study on improved efficiency and cooling LED lighting using a seebeck effect

Park, Jin-Sung; Huh, Chul

doi:10.1109/icpere.2012.6287245

Cited by 9 publications

(2 citation statements)

References 2 publications

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“…V S is the Seebeck voltage. A potential difference will be produced between two dissimilar electrical conductors or semiconductors if there is a temperature gradient across them [25], and this voltage difference is called the Seebeck voltage. l g = 7 µm, w g = 4µm are the length and width of the graphene nanoribbon, respectively.…”

Section: Electrical Characteristics For Slgmentioning

confidence: 99%

Thermoelectric Parameter Modeling of Single-Layer Graphene Considering Carrier Concentration and Mobility With Temperature and Gate Voltage

Wang

Cong

et al. 2019

IEEE Access

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Single-layer graphene (SLG) sheets can exhibit thermoelectric properties under the control of gate voltage. The controlled factors and regulation mechanism of SLG thermoelectric properties have become research hotspots. In this paper, a SLG thermoelectric parameter model considering carrier concentration and mobility with temperature and gate voltage is proposed. Based on the proposed model, the square resistance (R s ) and Seebeck coefficient (S) of the SLG are calculated. The results show that the maximum value of R s decreases from 5.8 K to 3.2 K at the Dirac voltage when the temperature increases from 100 K to 500 K. A large and stable S can be obtained at high voltages and temperatures. The maximum value of S can reach 161.3 µV/K at T = 500 K, exhibiting a more obvious thermoelectric characteristic. Simultaneously, the saturation law of the power factor (Q) with the change of gate voltage and the amplitude regulation of Q by temperature are obtained. This work can provide a theoretical basis for analyzing the thermoelectric characteristics of SLG.

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Section: Electrical Characteristics For Slgmentioning

confidence: 99%

Thermoelectric Parameter Modeling of Single-Layer Graphene Considering Carrier Concentration and Mobility With Temperature and Gate Voltage

Wang

Cong

et al. 2019

IEEE Access

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“…This cooling effect can also increase the efficiency of the LED [8]. Furthermore, the high total harmonic distortion of current (THDi) problem at LED lamps can be improved by using active filter.…”

Section: Introductionmentioning

confidence: 99%

Laboratory experiment of compact fluorescent and compact LED lamp for residential area

Musa

Abdullah

Rahim

et al. 2013

2013 IEEE Student Conference on Research and Developement

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Recent development in lighting system enable the use of Light Emitting Diode (LED) as one of the lighting system instead of fluorescent and others, because of its energy saving characteristic. Lighting system that operates with AC supply produced harmonic. Current solution to improve harmonic is by using active filter. This research revealed new approach to solve the problem where compact LED lamp directly connected to DC supply without using converter. It is relevant to study the performance between compact fluorescent lamps (CFL) and compact LED lamps. Laboratory experimental have been set up for CFLs and compact LED lamps to measure the data during the operation for both of the lamps such as voltage, current, power, power factor, harmonics, temperature and luminance. For compact LED lamps, the experiments are executed for two type of supply which are AC and DC supplies, where compact LED lamps that operates with AC consists of converter while compact LED lamps that operates with DC does not have converter. The analysis focuses more on the efficiencies of the lamps. This research suggests that compact LED lamps is better than CFL, cause it is driven by the cost savings.

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Fabrication of New Thermoelectric Block Floor for Power generator

Inthachaia

Prapaporn

Singsoog

et al. 2019

J. Phys.: Conf. Ser.

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This was the study and designing of the thermoelectric block floor for power generator that are normally used for footpaths, traffic islands, and gardening together with solar radiation heat. Physically, this thermoelectric block is an octagonal block with a size of 19.8 × 19.8 × 6 cm. The block was composed of two layers. The upper layer received the solar radiation and produced the thermoelectric module heat by synthesizing thermoelectric materials and creating 4 thermoelectric modules from Bi2Te3 for one composition set where an aluminum sheet was used for cooling. Additionally, the lower layer was exposed to the ground with low temperature to produce the usable electric power. The efficiency of this electric power was tested with the solar radiation heat of the thermoelectric block floor and by the Thai Industrial Standards (TIS) 827-2531: Interlocking Concrete Paving Blocks. After installing the thermoelectric block floor at the Faculty of Industrial Technology, Sakon Nakhon Rajabhat University, it was found that the block was usable as defined by TIS 827-2531: Interlocking Concrete Paving Blocks; meanwhile, the test on the electric power of the thermoelectric block floor indicated that the maximum electric potential difference was 73.91 mV where the temperature difference was 6.2 K measured from the surface of the block. In addition, the maximum electric power was 88.25 mV where the solar radiation was 1124.5 W m-2. Notably, this electric power of the thermoelectric block floor was directly variable following the solar radiation value. However, if used for power generator or as an alternative energy for engineering activities, the thermoelectric block should be properly designed and developed to produce higher level of electric power and more of them should be created for both series circuit and parallel circuit.

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A study on improved efficiency and cooling LED lighting using a seebeck effect

Cited by 9 publications

References 2 publications

Thermoelectric Parameter Modeling of Single-Layer Graphene Considering Carrier Concentration and Mobility With Temperature and Gate Voltage

Thermoelectric Parameter Modeling of Single-Layer Graphene Considering Carrier Concentration and Mobility With Temperature and Gate Voltage

Laboratory experiment of compact fluorescent and compact LED lamp for residential area

Fabrication of New Thermoelectric Block Floor for Power generator

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