• Title/Summary/Keyword: heater

Search Result 1,746, Processing Time 0.036 seconds

Influence of the Parameters of a Heater Array Inducing a Thermo-optic Long-period Grating on its Power Consumption (열광학 장주기 격자를 유도하는 히터 배열의 인자들이 파워 소모에 미치는 영향)

  • Kwon, Min-Suk
    • Korean Journal of Optics and Photonics
    • /
    • v.19 no.4
    • /
    • pp.315-319
    • /
    • 2008

  • We investigate theoretically the power consumption of a notch filter using a thermo-optic long-period grating, which is induced by a heater array consisting of periodic heaters and pads made of metal thin-film. Since the power consumed by the heater array is converted to joule heat that generates the thermo-optic long-period grating, the characteristics of the notch filter are dynamically controlled by adjusting it. The power necessary for appropriate coupling efficiency depends on the parameters of the heater array, which are the width and length of a heater, pad width, and the thickness of the thin-film. We explain an approximate method of analyzing the influence of the parameters on the consumed power. Using the analysis method, we simulate the change of the power depending on the parameters. From the simulation, we suggest a few guidelines on the parameters required to reduce the power.

  • https://doi.org/10.3807/HKH.2008.19.4.315 인용 PDF KSCI

A Study on the Maximum Energy Transfer of a Small Industrial Induction Heater (소형산업용 인덕션 히터의 최대에너지 전달에 관한 연구)

  • Lee, Jeong-Bin;Kim, Tae-Myoung;Kim, Young-Wan
    • Journal of IKEEE
    • /
    • v.25 no.3
    • /
    • pp.534-539
    • /
    • 2021

  • Induction heating method that allows the maximum heating power to be delivered by varying switching frequency in the inductance change of the work coil of induction heater was proposed in this paper. Depending on the type of work piece in the work coil and proximity to the work coil, the resonance frequency of the resonant circuit will be changed. It may be difficult to deliver the maximum power due to the damage of the induced heater element or switching loss depending on the resonance frequency and switching frequency operating relationship. The switching frequency was variable to maintain the maximum power transmission by sensing the heating power due to the change of the resonance frequency. Through the result of the proposed method that can be controlled within the required output change range according to the change of the switching frequency corresponding to the change of the resonance frequency, the induction heater having a variable switching frequency characteristic that can transmit almost constant output power (within 0.43 dB) power efficiency was achieved.

  • https://doi.org/10.7471/ikeee.2021.25.3.534 인용 PDF KSCI

A Study on the Coolant leaks Prevention Design of Heaters for Combat Vehicles (전투차량용 온수히터 냉각수 누수방지 설계에 관한 연구)

  • Park, Dong Min;Kwak, Daehwan;Jang, Jongwan
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.21 no.10
    • /
    • pp.379-385
    • /
    • 2020

  • This paper presents a design for preventing coolant leaks in the core part of a heater mounted in a combat vehicle. The heater is a device that makes heated coolant flow through the heater core in the crew room. A problem with coolant leaks in the heater core area during the operation of a combat vehicle was identified. This problem is caused mainly by high pressure at the junction of the tank and tube due to the vulnerability of this area. To solve this problem, an improved core was made by improving the welding method and changing the end region of the heater core to a structure that can withstand high pressure. When pressure was applied sequentially to the existing core and improved core, a leak occurred at 7.0 kgf/㎠ in the existing core while the improved core maintained its structure up to 17.0 kgf/㎠, highlighting the improvement. Finally, performance tests and environment tests were conducted to demonstrate the suitability of the improved structure. The improved heater will be applied to combat vehicles. This paper is expected to serve as a reference for improving defense capabilities by securing reliability as well as the design and analysis of failures of similar equipment.nse capabilities through securing reliability as well as the design and analysis of failures of similar equipment.

  • https://doi.org/10.5762/KAIS.2020.21.10.379 인용 PDF KSCI

Experimental Study on the Heating Performances of the Air Heater with Diesel for Passenger Cabin Heating of an Electric Vehicle (전기자동차용 승차공간 난방용 디젤 공기 히터의 실차 성능에 관한 연구)

  • Bang, You-Ma;Seo, Jae-Hyeong;Lee, Moo-Yeon
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.16 no.11
    • /
    • pp.7250-7255
    • /
    • 2015

  • The objective of this study is to experimentally investigate the heating performances of the portable air combustion heater using diesel fuel for auxiliary cabin heating of the battery electric vehicle. In order to evaluate the heating performances of the air combustion heater, the heating capacity was calculated by the temperature at inlet and outlet parts of the considered heater and the inner temperature distribution characteristics of the vehicle were measured during 1600 seconds with an interval of 1 second. The theoretical efficiency of the tested heater was calculated by temperature data of the air of supplying and exhausting to the cabin. As the air passed the heat-sink, the air temperature at the end of heat-sink reached to $101.3^{\circ}C$ and the difference of temperature on heat-sink was 67.8%. The average heating capacity of the air combustion heater showed 2.0 kW. After 1800 seconds, the inner temperature of the vehicle cabin was continuously increased. The temperatures of the top side and the bottom side of the car cabin under consideration were increased upto $42.5^{\circ}C$ and $24.3^{\circ}C$, respectively, and the theoretical efficiency of the tested heater was on average 63.7%.

  • https://doi.org/10.5762/KAIS.2015.16.11.7250 인용 PDF KSCI