Cooling Water Jacket Design and Fluid-Solid Coupling Heat Transfer Analysis of Oil-Gas Mixed Transmission Twin-Screw Pump Under High Gas Volume Fraction

Li Wang,Xuejing Zhang,JunHu Yang,Chong Ma,Wei Han,Yubing Gong 한국유체기계학회 2023 International journal of fluid machinery and syste Vol.16 No.2

When GVF in the inlet of the oil-gas mixed transmission twin-screw pump is high, the temperature difference between the inlet and outlet of the screw pump will rise significantly, and rotor expansion jam will occur. To prevent the expansion jam caused by the overheating of the screw pump, the cooling water jacket is designed for gas-liquid mixed screw pump with high GVF to continuously cool. Using the theory of fluid-structure interaction heat transfer, the cooling effect of the cooling water jacket of the equal pitch screw pump and the variable pitch screw pump is numerically calculated, and after comparison with the experiment, it finds that the maximum deviation of the outlet temperature of the variable pitch screw pump does not exceed 4K and the average deviation is about 6 %. When GVF is 96%, the calculation of the cooling water cavity shows that the average temperature drop of the liner after the cooling of the equal pitch screw pump and the variable pitch screw pump is about 4K and 3K, respectively. When GVF rises from 90% to 99%, the average temperature drop is about 3.5K. Cooling water jacket has obvious cooling effect on screw pump with high GVF.

Computational Fluid Dynamics를 활용한 점/접착 생산 공정 내 Jacketed Vessel 설계 최적화

주종효 ( Chonghyo Joo ),박현도 ( Hyundo Park ),조형태 ( Hyungtae Cho ),김정환 ( Junghwan Kim ) 한국공업화학회 2020 공업화학 Vol.31 No.6

점/접착제 생산 공정은 배합 과정에서 mineral insulated (MI) cable을 통해 내부 용액을 76 ℃까지 가열 및 혼합 후 제품출하를 위해 30 ℃까지 상온 냉각을 진행한다. MI cable을 이용한 반응기의 경우, 냉각시간이 평균 10 h 소요되어 생산효율이 낮은 문제점이 있지만, jacketed vessel을 설치하면 위의 문제를 효과적으로 해결할 수 있다. 그러나 jacketedvessel의 종류가 다양해 jacket을 설치하기 전, 배합 공정조건에 적합한 종류를 찾아야 한다. 본 연구에서는 생산효율에 영향을 주는 냉각시간을 최소화하기 위해 computational fluid dynamics (CFD)를 이용하여 jacket 종류에 따른 냉각시간을 비교해 공정에 적합한 jacketed vessel 모델을 개발하고, 점/접착제 생산 공정에 최적화된 jacketed vessel을 설계하였다. 연구 결과, jacket의 높이가 같을 때, half-pipe coil jacket보다 plain jacket의 냉각 성능이 32.7% 더 우수하였고, plainjacket에 60% spiral baffle을 설치하여 냉각 공정에 이용할 경우 냉각시간을 80.4%, 작업시간을 25.1% 단축 가능하다. Blending process of adhesive production has a cooling process to cool down the temperature of the solution which was heated up to 76 ℃ with a mineral insulated (MI) cable by 30 ℃ at room temperature. Using a MI cable in the adhesive production process makes the production inefficient because it takes about 10 h for the cooling process. If a jacketed vessel is used instead of the MI cable, it would shorten the cooling downtime without any additional cooling system by using cold water. However, there are various types of jacketed vessels, and thus the most suitable type should be found before set up. In this study, we designed the optimized jacketed vessel for the adhesive production process by calculating the cooling downtime, which impacts production efficiency, as a function of the jacket types using computational fluid dynamics. As a result, the cooling performance of the plain jacket was 32.7% superior to that of the half-pipe coil jacket with the same height. In addition, the plain jacket with 60% spiral baffle reduced the cooling downtime and operating time by 80.4% and 25.1%, respectively.

28℃냉방 실내에서 얼음부착 자연형냉각재킷의 열쾌적 특성

정근주(Jung, Gun-Joo) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.4

For the building energy saving, Korean Prime Minister recommended that the room temperature keep above 28℃ during cooling season in the public facilities. If the facility manager would keep the room’s temperature to the extent, Predicted mean vote(PMV), Percentage of predicted dissatisfied(PPD) with ISO-7730 in the room were approximately 1.2(“slightly warm”), 35%, respectively. The previous research developed the passive cooling jacket(PCJ) with reflection louver and ventilation clothes, and it attached ice packs on the PCJ of which name is ICEPCJ for the human body cooling. The purpose of this research is to improve the thermal comfort with ICEPCJ in the room controlled within 28℃ through the experiment with subjects who are wearing clothes. The research measured MST(Mean skin temperature) and thermal environment parameters, and it asked ASHRAE TSV(Thermal sensation vote 7scale) and DISC(Thermal discomfort 11scale) for the 6 voluntary subjects who are each subject wearing ICPCJ, PCJ, TTJ(Traditional textile jacket) in due sequence. Factors are measured in the experiment room where the controlled conditions were DBT 28(℃), RH 65%, air velocity 0.05(m/sec). In this experiment, TSVs and DISCs of subjects who were wearing ICEPCJ were approximately 0.67 lower than who are wearing PCJ, and 1.83 lower than when wearing TTJ. MST of subjects when wearing ICEPCJ were approximately 0.45℃ lower than when wearing PCJ, and 0.64℃ lower than when wearing TTJ. In conclusion, the ICEPCJ in this research can improve the thermal comfort in the room temperature controlled with 28℃ .

전동기 End-winding 및 내부 권선에 관한 Water jacket의 열전달 및 냉각 성능에 관한 연구

최재훈(Jaehun Choi),박희성(Heesung Park) 한국유체기계학회 2023 한국유체기계학회 학술대회 논문집 Vol.2023 No.12

냉각재킷의 설계인자에 따른 열전냉각장치의 성능에 관한 연구

박상희(Sang Hee Park),이정은(Jeong Eun Lee),김경진(Kyoungjin Kim),김동주(Dongjoo Kim) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.3

A small-scale thermoelectric cooling system was built in an effort to enhance the performance of the refrigeration system by utilizing the water-cooled jacket which was attached to the hot side of the thermoelectric module. Considered design parameters for the water-cooled jacket were the geometry of the flow passage inside the jacket and the flow rate of cooling water. The higher flow rate of cooling water in the jacket resulted in a better performance of the refrigeration system. The increase in the number of channels for water flow passage inside the cooling jacket also showed significant improvement on the performance of the thermoelectric cooling system such as the cooling capacity and the COP of the refrigeration system.

열전소자 냉각 자켓의 설계인자가 열전냉각 시스템의 성능에 미치는 효과에 대한 실험적 연구

이정은(J. E. Lee),박상희(S. H. Park),김경진(K. Kim),김동주(D. Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5

A small-scale thermoelectric cooling system was built in an effort to enhance the performance of the refrigeration system by utilizing the water-cooled jacket which was attached on the hot side of the thermoelectric module. Considered design parameters for the water-cooled jacket included the geometry of the flow passage inside the jacket and the flow rate of cooling water. The higher flow rate of cooling water in the jacket resulted in a better performance of the refrigeration system. The introduction of geometrical complexity of the cooling water flow passage to the cooling jacket also showed significant improvement on the performance of the thermoelectric refrigeration system such as the cooling capacity and the COP of the refrigeration system.

Thermal Analysis of IPMSM with Water Cooling Jacket for Railway Vehicles

Chan-Bae Park 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.3

In this paper, the water cooling method among the forced coolant cooling methods is considered to be applied to the 110kW-class IPMSM for railway vehicles. First, basic thermal property analysis of the IPMSM is conducted using the three-dimensional thermal equivalent network method. Then, based on the results of the basic thermal property analysis, some design requirements for the water cooling jacket are deduced and a basic design of the water cooling jacket is carried out. Finally, thermal equivalent circuit of the water cooling jacket is attached to the IPMSM’s 3D thermal equivalent network and then, the basic thermal and effectiveness analysis are conducted for the case of applying the water cooling jacket to the IPMSM. In the future, the thermal variation trends inside the IPMSM by the application of the water cooling jacket is expected to be quickly and easily predicted even at the design step of the railway traction motor.

Thermal Analysis of IPMSM with Water Cooling Jacket for Railway Vehicles

Park, Chan-Bae The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.3

In this paper, the water cooling method among the forced coolant cooling methods is considered to be applied to the 110kW-class IPMSM for railway vehicles. First, basic thermal property analysis of the IPMSM is conducted using the three-dimensional thermal equivalent network method. Then, based on the results of the basic thermal property analysis, some design requirements for the water cooling jacket are deduced and a basic design of the water cooling jacket is carried out. Finally, thermal equivalent circuit of the water cooling jacket is attached to the IPMSM's 3D thermal equivalent network and then, the basic thermal and effectiveness analysis are conducted for the case of applying the water cooling jacket to the IPMSM. In the future, the thermal variation trends inside the IPMSM by the application of the water cooling jacket is expected to be quickly and easily predicted even at the design step of the railway traction motor.

Thermal Analysis of IPMSM with Water Cooling Jacket for Railway Vehicles

박찬배 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.3

In this paper, the water cooling method among the forced coolant cooling methods isconsidered to be applied to the 110kW-class IPMSM for railway vehicles. First, basic thermal propertyanalysis of the IPMSM is conducted using the three-dimensional thermal equivalent network method. Then, based on the results of the basic thermal property analysis, some design requirements for thewater cooling jacket are deduced and a basic design of the water cooling jacket is carried out. Finally,thermal equivalent circuit of the water cooling jacket is attached to the IPMSM’s 3D thermalequivalent network and then, the basic thermal and effectiveness analysis are conducted for the case ofapplying the water cooling jacket to the IPMSM. In the future, the thermal variation trends inside theIPMSM by the application of the water cooling jacket is expected to be quickly and easily predictedeven at the design step of the railway traction motor.

철도차량용 IPMSM의 Water-cooling Jacket 설계 연구

박찬배(Chan-Bae Park),이준호(Jun-Ho Lee),이병송(Byung-Song Lee) 대한전기학회 2013 전기학회논문지 Vol.62 No.10

In this paper, the basic design study of a water-cooling jacket, which have reported no cases for applying to railway traction motors so far, were conducted for applying to Interior Permanent Magnet Synchronous Motor (IPMSM) for railway vehicles. The basic thermal characteristics analysis of the 110kW-class IPMSM was performed by using 3-dimentional thermal equivalent network method. The necessary design requirements of the water-cooling jacket were derived by analyzing the results of the basic thermal properties. Next, the thermal characteristics analysis technique was established by using the equivalent model of the solenoid-typed pipe to be installed on the inside of the water-cooling jacket for 110kW-class IPMSM. Finally, a design model of 6kW-class water-cooling jacket was derived through the analysis of various design parameters.