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Application prospect of thermoelectric cooling technology in temperature control of composite materials

In practical application, the thermoelectric modules are often placed inside of devices, and even they can be directly combined with devices needing refrigeration into a whole. For example, in optical application, the thermoelectric module can be a part of a detector or diode; in a semiconductor device, it can become a whole with the ceramic package. This lays the foundation for developing composite materials with temperature control-structure integration or even intelligent temperature control composite materials.

Especially with the further miniaturization of the refrigeration module structure, the adverse effects of internal contact layer resistance, heat conduction and thermal radiation will be more significant. Therefore, the thin film integrated structure with strong compatibility will become the mainstream development direction of microelectronic cooling technology.

Thus, thermoelectric cooler (TEC) with the integrated design and integration technology of aerospace vehicles in the aspects of function and structure satisfies the future development trend of thermoelectric cooling technology, especially in the application of aerospace. Based on composite materials of TEC temperature control and intelligent temperature control, the organic combination of TECs, structural materials and functional materials is a major development direction of future application of thermoelectric cooling technology.

If you have any questions and suggestions about TECs, please feel free to contact us. We will be very happy to receive your feedback.

Our web site is http://www.analogtechnologies.com/

Keywords: TEC, thermoelectric cooler, thermoelectric module

 

0 Comments | Posted in News By Fang Liu

Analysis of LED market prospects

2015年9月14日月曜日 2時13分36秒 America/Los_Angeles

LED is the abbreviation of light emitting diode, which is a solid light emitting device of semiconductor. Using light emitting materials of solid semiconductor chips, carriers in semiconductor will composite, cause photon emission and produce light, when the two ends of LED are with forward voltage. LED can directly emit red, yellow, blue, green, green, orange, purple and white light.

Our country has huge lighting market of LED and also has strong industrial foundation of lighting. With the development of semiconductor lighting technology, performance improvement of LED lighting and the reducing of cost, China's LED lighting market outlook will gradually appear.

(1)   The huge demand of lighting.

In our country, lighting market is very huge because traditional lighting sources have disadvantages of big energy consumption, low brightness and unsafe. LED lighting will replace the traditional light source and lamp.

(2)   A good lighting industrial base.

As lighting industry foundation is very strong, our country is the world's largest producer of lighting sauce and light lamps. According to statistics of China Lighting Electric Appliance Association, in 2010, the outputs of national incandescent lamps are 3.8 billion and fluorescent lamp production are 6.69 billion, of which the yields of fluorescent lamps of straight tube are 1.83 billion, the yields of ring-shaped fluorescent lamps are 1.8 billion and the yields of CFL are 4.43 billion. In 2010, the national production of HID lamp is 174 million, of which high pressure mercury lamp production is 56 million, high pressure sodium lamp production is 54 million, and metal halide lamp production is 63 million. At the same time, China's lighting consumption is mainly provided by the domestic production enterprises, andthe imported products accounted for less than 5% in the domestic consumer market. Nearly 70% of domestic production is for export. A good lighting industrial basewill not only provide a reliable supply of products in domestic market of LED lighting, but also provides a very good support of promoting cost performance of LED through scale effect.

(3)   Government support policies

From a policy perspective, the State supports the LED lighting industry development through establishing the engineering research of national semiconductor lightingand industry alliance, introduce related financial support measures, policies and regulations and other means. Through fiscal subsidy way, the yields of efficient lighting products will be more than 150 million. In order to make the policy benefit more residents in rural areas, it is clearly demanded that the promotion proportion is not less than 30% of the total in this year. In addition, China will also produce hold the LED street lamps, landscape lighting and large billboard projects, which are needed in large-scale activities. These will have a great inspiration for LED industry prospects.

With the development of economy and technology, it is believed that LED will be more and more popular.

0 Comments | Posted in News By Fang Liu

Characteristic analysis of TEC refrigeration cycle (III)

2015年8月31日月曜日 20時32分44秒 America/Los_Angeles

From (3), (13) and (14), it is shown that when Th -Tc>△Tmax, the cooling capacity qc<0. At the same time, TEC cannot cool, but start heating, which is not allowed in practical work. So the working current should be controlled in range of I0IIsat, which can ensure the cooling capacity qc≥0. Although based on the analysis of the cooling capacity qc, the general range of working current can be determined, but in practical work, the refrigeration coefficient is still an important indicator. From (9), when the working current of TEC satisfies the following relations, the TEC can reach the maximum refrigeration coefficient βmax:

 

Where, Iopt is the working current in the condition of meeting the optimal refrigeration coefficient; Z is the figure of merit, ;.The relationship among current I, cooling capacity qc and β is shown in the figure 3. When Ish<I<0 and W<0, TEC is in the power generation mode. When I<Ish、0<I<I0 and I>Isat, the cooling capacity of TEC qc<0 and it will heat the cold load, which should be avoided as far as possible in practical work. When 0<I<Isat, the amount of heating load is small because there exists the Peltier effect reducing the impact of heat resistance in the cold end. Only when the current meetsI0<I<Isat, TEC can work normally in the cooling mode; when I=I0 or I=Isat, it cannot cool. The cooling capacity qc is a quadratic function about current I, so qc is symmetric in the two interval, I0<I<Isat and Imax<I<Isat. However, when considering that the refrigeration coefficient β increases with the current increasing in the range of I0<I<Iopt and decreases with the current increasing in the range of Iopt<I<Isat, so he refrigeration coefficient should be considered at the same time with improving cooling capacity and the working current in Imax<I<Isat is not selected in general. Obviously, TEC has two extreme ways of working, the maximum refrigeration coefficient operation mode and the maximum cooling capacity operation mode. The former is the operation mode of variable voltage and variable operating current; the latter is the operation mode of constant working voltage and working current. But in the actual work, the hot and cold end temperature of thermoelectric cooler is changing, and it generally works between the maximum refrigeration coefficient and the maximum refrigeration capacity, so the current needs to be regulatedaccording to the actual situation.

If you want to know more, please click here http://www.analogtechnologies.com/

Keywords: TEC, thermoelectric cooler

0 Comments | Posted in News By Fang Liu

TECへの入門

2015年3月9日月曜日 20時00分10秒 America/Los_Angeles

最初ペルティエにより1834年に発見された熱電気のクーラー(TEC)は、 基礎として半導体素材であり、それは小さいヒートポンプの電子部品として使われうる。TECの両方の終わりに低いDC電圧をロードすることによって、追跡は要素の一面から他に進展する。この時、TECの一面の温度は減らされて、他の側温度は上がる。電流の方向が変更される限り、熱の方向が変更されて、熱が他の終わりに伝えられることに注意することは値する。従って、TECは冷蔵と加熱の2つの機能を同時に実現できる。さらに、TECは、また、温度を正確にコントロールするために使用できる。

 

私達は例として典型的な単段TECを取る。そして、私達はTECをラジエーターに置き、それを室温に保持する。それの後に、私達は適切な電流またはDC電源供給において、それをリンクし、TECの粘土塊側温度は約-40度に低下する。ちょうど、TECは相対的な熱平衡州に到着し、TECの両面の温度違いは最高点(DTmax)に達することができる。もし常に冷たいが入力するならば、その温度は徐々に増大し、それは、熱く、冷たい側の温度が同じであるまで、増大するのをやめる。今頃までには、冷蔵庫は最大の冷却能力(Qmax)に達する。

0 Comments | Posted in News By Fang Liu

TECコントローラ

2015年1月27日火曜日 21時46分40秒 America/Los_Angeles

TECコントロールという原則はペルチエ効果と呼ばれる。それは1834年にジャン・シャルル・アタナーズ・ペルティエにより発見された。簡単に話すことによって、それは明らかにする that 電流がカップルを通過し、熱電対の2つの側の間で温度違いが作成される時の事実 。TEC(サーモ電気のクーラー、またはペルティエクーラー)は、冷却するか、またはTECの2つのターミナルを通して現在の行きの方向に依存している熱のロードの温度を熱することができる半導体機器である。TECコントローラを使うことによって、熱のロード温度は、TECを通して現在の行きの方向とマグニチュードをコントロールすることによって正確に調節できる。TECA1-XV-XV-DシリーズTECコントローラ機能高効率、高い安定性、高信頼性、およびコンパクトなサイズ。最大の電流は2.5A.それらである レーザーシステムの温度をコントロールするためにしばしば使われる 。これらのTECコントローラの多くは、私達のTECモジュール、サーミスター、および熱的伝導性エポキシ樹脂によってよく働く。あなたは、いつも、最上品を、効率的なアナログ技術Inc.から費用効果が高いおよび長い続きを提供されるTECコントローラと気付くかもしれない。適正価格のTECコントローラのアナログ技術申し出良好品質。私は、あなたが私達の製品からたくさんに役立っているかもしれないと信じる。TECコントローラの多くは、選ぶので、あなたがより多くの選択を持つように入手可能である。

0 Comments | Posted in News By Fang Liu