• Title/Summary/Keyword: Industrial Dryer

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A Study on Operating Method to Save Energy from the Adsorption Dryer in the Process of Purifying Compressed Air (고순도 압축공기 제조시스템의 흡착식 Dryer에서 에너지절감을 위한 운전방법에 관한 연구)

  • Kang, Seok-Wan;Chang, Sung-Ho;Kim, Hyeon-Joon;Kim, Sung-Soo;Lee, Yeong-Wook
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.39 no.3
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    • pp.180-191
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    • 2016
  • Optimizing energy usage for maximum efficiency is an essential goal for manufacturing plants in every industrial manufacturing sector. The generation and distribution of purifying compressed air is a large expense incurred in practically all manufacturing processes. Not only is the generation and treatment expensive equipment of compressed air, but frequent maintenance and effective operation is also required. As a plant's compressed air system is often an integral part of the production process, it needs to be reliable, efficient, and easy to be maintain. In this paper, we study to find operating method to save energy from the adsorption dryer in the process of purifying compressed air, which is required for a clean room production site in "A" company. The compressed air passes through a pressure vessel with two "towers" filled with a material such as activated alumina, silica gel, molecular sieve or other desiccant material. This desiccant material attracts the water from the compressed air via adsorption. As the water clings to the desiccant, the desiccant particle becomes saturated. Therefore, Adsorption dryer is an extremely significant facility which removes the moisture in the air $70^{\circ}C$ below the dew point temperature while using a lot of energy. Also, the energy consumption of the adsorption dryer can be varied by various operating conditions (time, pressure, temperature, etc). Therefore, based on existing operating experiments, we have searched operating condition to maximize energy saving by changing operating conditions of the facility. However, due to a short experiment period (from September to October), further research will be focused on considering seasonality.

Analyses of Power Consumption of the Heat Pump Dryer in the Automobile Drying Process by using the Principal Component Analysis and Multiple Regression (주성분 분석과 다중회귀모형을 사용한 자동차 건조 공정의 히트펌프 건조기 소모 전력 분석)

  • Lee, Chang-Yong;Song, Gensoo;Kim, Jinho
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.38 no.1
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    • pp.143-151
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    • 2015
  • In this paper, we investigate how the power consumption of a heat pump dryer depends on various factors in the drying process by analyzing variables that affect the power consumption. Since there are in general many variables that affect the power consumption, for a feasible analysis, we utilize the principal component analysis to reduce the number of variables (or dimensionality) to two or three. We find that the first component is correlated positively to the entrance temperature of various devices such as compressor, expander, evaporator, and the second, negatively to condenser. We then model the power consumption as a multiple regression with two and/or three transformed variables of the selected principal components. We find that fitted value from the multiple regression explains 80~90% of the observed value of the power consumption. This results can be applied to a more elaborate control of the power consumption in the heat pump dryer.

Analysis and Verification of High Temperature Heat Pump Dryer using Waste Heat Recovery Type for R245fa Refrigerant (배기가스 배열을 활용한 R245fa 냉매용 고온 히트펌프 건조기의 해석 및 검증)

  • Bae, Kyung-Jin;Cha, Dong-An;Kwon, Oh-Kyung
    • Journal of Power System Engineering
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    • v.20 no.2
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    • pp.73-78
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    • 2016
  • In this study, the performance characteristics of a high temperature heat pump dryer that is able to raise the air temperature up to $80^{\circ}C$ by using waste heat as heat source were investigated numerically. The main components of the heat pump dryer were modeling as a compressor, condenser, evaporator and expansion device, and R245fa was selected as refrigerant. Experiments were also conducted to validate the numerical data. As a result, when the evaporator air inlet temperature increased from $50^{\circ}C$ to $65^{\circ}C$, the numerical results of the hot air temperature at outlet and heat pump COP were about 8~11% and 5~8% higher than that of experimental ones, respectively.

A Study on the Development of Industrial Dryer using the Superadiabatic Combustion Phenomena (초단열 연소현상을 이용한 산업용 건조기 개발에 관한 연구)

  • Chae, J.O.;Hwang, J.W.;Han, J.H.;Hwang, H.J.;Jun, J.K.;Han, J.O.;Lee, J.S.;You, H.S.;Lee, H.C.
    • Proceedings of the KSME Conference
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    • 2000.04b
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    • pp.168-174
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    • 2000
  • This paper illustrates the validity of reciprocating type superadiabatic combustor as a industrial applicable dryer. After the investigations of inner and surface temperature distributions of combustor various with air-fuel(methane) ratio, mixture flow rate and reciprocating time, this combustor can be applied in industrial dryer at certain operating conditions. The results are as follows. 1) Higher equilivalence ratio emits more radiation heat flux at the censer chamber 2) Higher mixture flow rate makes more uniform temperature distribution. however, due to the heat transfer from censer chamber to porous media, the radiation beat flux is worse. 3) Longer reciprocating time emit more radiation heat flux. however, this case also makes temperature distribution wide

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Drying Characteristics of 25 kW Class Industrial Dryer Adopting Mat Type Premixed Catalytic Burner (매트 형태의 예혼합 촉매 버너를 활용한 25 kW급 건조기의 성능 특성)

  • Ahn, Joon;Kim, Hyouck-Ju;Song, Kwang-Sup;Choi, Kyu-Sung;Song, Dae-Seok
    • Proceedings of the KSME Conference
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    • 2008.11b
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    • pp.2856-2861
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    • 2008
  • A catalytic burner has been developed to utilize thermal energy from the fossil fuel without nitrogen oxides (NOx) emission. The burner is shaped into a mat to maximize the heating surface. Premixed combustion has been developed to be used in a closed chamber, such as a radiation type industrial dryer. The burner yields the thermal energy in the form of thermal radiation in the infrared regime, which is proved to be effective to dry organic substances for low moisture condition. Thermal efficiency including the sensible heat is better correlated to the moisture compared to the dry rate.

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Drying Characteristics of a Radiative Industrial Dryer Adopting a Mat-Type Premixed Catalytic Burner (매트 형태의 예혼합 촉매 버너에 의한 복사 건조 특성)

  • Kim, Hyouck-Ju;Ahn, Joon;Song, Kwang-Sup
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.35 no.7
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    • pp.735-742
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    • 2011
  • A catalytic burner that utilizes the thermal energy from fossil fuels without the emission of nitrogen oxides ($NO_x$) has been developed. For this purpose, the newly developed burner has two features: firstly, it is in the shape of a flat mat so as to maximize its heating surface, and secondly, it adopts premixed combustion so that it can be used in a closed space. In the present study, the burner was used in a radiation-type industrial dryer. This dryer yields thermal energy in the form of thermal radiation in the infrared regime, which has been proved to be effective for drying organic substances under low-moisture conditions. Analysis of the experimental data has proved that the thermal efficiency of the dryer is better correlated to the moisture than to the dry rate

Study on Design Technology of Heat Pump Cycle for High Temperature Performance (고온 생산용 열펌프 사이클 설계)

  • Kim, Jong-Ryul;Kim, Seok-Young;Kim, Yong-Min;Lee, Kong-Hoon;Kim, Ook-Joong;Yi, Sung-Chul;Jung, Chi-Young;Kim, Jong-Ryeol
    • Journal of Energy Engineering
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    • v.19 no.4
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    • pp.228-233
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    • 2010
  • About 55% of total energy is consumed in the industrial division. The industrial heat pump application will show magnificent energy saving effect as well as higher cost efficiency because of larger energy consuming volume of each facility and longer operation hour and higher stability against seasonal temperature change. Over 90% of dryer for industrial usage has hot wind heat source and hot wind dryer is the representative type covering 68.7% while its 30 ~ 50% lower heat efficiency causes lots of energy loss by exhaust air. Re-usage of exhaust air can improve energy efficiency of dryer because 68% heat energy or 78% of hot air lose in exhaust air. Therefore, high temperature heat pump dryer can be the best alternative. Comparing to the existing dryer with 30% ~ 50% energy efficiency, newly developing high temperature heat pump dryer will enhance energy efficiency up to 60% ~ 80% efficiency. In this paper, heat pump system for high temperature was designed, constructed and tested. The results have shown that system COPh is estimated as 3.3.

Development of a Rice Circulating Concurrent-flow Dryer (I) - Performance Test of Pilot Scale Dryer - (순환식 병류형 곡물건조기 개발 (I) -시작기의 성능시험 -)

  • Han J.W.;Keum D.H.;Han J.G.;Kim H.;Hong S.J.
    • Journal of Biosystems Engineering
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    • v.31 no.4 s.117
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    • pp.349-354
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    • 2006
  • This study was performed to evaluate the performances for a concurrent flow rice dryer of pilot scale with devices for circulating rice. The pilot scale dryer with the capacity of 700 kg was developed to obtain design informations for the development of actual scale dryer of holding capacity of 10 tons. Three drying tests were conducted at two temperature levels of $100^{\circ}C\;and\;120^{\circ}C$, and two air flow rates levels of $28.5cmm/m^2\;and\;57.1cmm/m^2$. Drying conditions for Test-1, Test-2 and Test-3 were $100^{\circ}C\;-28.5cmm/m^2,\;120^{\circ}C-28.5cmm/m^2\;and\;120^{\circ}-57.1cmm/m^2}$ respectively. Drying rates were 0.73%(w.b./h) for Test-1, 0.90%(w.b./h) for Test-2 and 1.46%(w.b./h) for Test-3. The crack ratios of brown rice after drying ranged from 2.4% to 8.4%, and increased with the increase of drying rate and airflow rate. The energy consumptions were from 6,225 kJ/kg to 6,993 kJ/kg which was higher than that of conventional cross-flow rice circulating type dryer used in Korea. This results were due to the lower ambient air temperatures of $4.5^{\circ}C\;to\;13.4^{\circ}C$ during drying tests.