• 제목/요약/키워드: Vehicle cooling system

검색결과 197건 처리시간 0.023초

A/C 콘덴서를 포함한 차량냉각 성능예측에 관한 연구 (A Study on Prediction Method of Vehicle Cooling Performance with A/C Condenser)

  • 이상호;박정원
    • 한국자동차공학회논문집
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    • 제10권3호
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    • pp.51-60
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    • 2002
  • An analysis method to predict performance of a vehicle cooling system which is composed of radiator, A/C condenser, cooling fan, and etc. is suggested. Air flow through the heat exchanger system and heat rejection rate which dominate the cooling performance are analyzed. Heat transfer with A/C refrigerant phase change is also considered in the analysis. Some predicted results are compared with experimental data for various operating conditions. This evaluation procedure will be useful for the design of optimal vehicle cooling system.

차량 연비 향상을 위한 대형 디젤엔진 차량의 엔진 냉각 및 부대장치 연구 (Vehicle Fuel Economy Improvement by Studies on the Engine Cooling and Ancilliaries System of the Heavy Duty Engine)

  • 류명석
    • 한국자동차공학회논문집
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    • 제15권3호
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    • pp.79-84
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    • 2007
  • Recently it is strongly required to develop the better fuel economy as well as basic power performance based on strict emission legislation. This paper focuses on studies of the engine cooling and ancillaries system among fuel economy factors in the developing stage. Firstly through the analysis of the current specifications, it is assessed whether each components may be designed properly, not overdesigned. Secondly, it is predicted how the fuel economy of each components can be improved. Finally the results are confirmed by vehicle field test equppted with the updatedcomponents. This study found good agreementbetween the prediction and the field test on the vehicle fuel economy improvements of the heavy duty engine vehicle with updated components such as engine cooling and ancilliaries.

물 분사 냉각시스템을 이용한 발사대 화염유도로의 냉각특성 (The Cooling Characteristics of a Gas Deflector Using Water Spray Cooling System in Launch Pad)

  • 이광진;정용갑;조남경;남중원;정일형;라승호
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2011년도 제37회 추계학술대회논문집
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    • pp.756-762
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    • 2011
  • 화염유도로 냉각시스템은 발사체 엔진의 점화 시 발생하는 충격파를 감쇠하는 중요한 역할을 수행한다. 또한 이 시스템은 발사체의 구조와 페이로드를 손상시킬 수 있는 커다란 진동을 감소시키기도 한다. 나로우주센터의 발사대에 설치된 화염유도로 냉각시스템은 발사체 엔진의 화염에 직접 물을 분사시키도록 구축되었으며, 나로호의 비행시험 결과는 화염유도로를 냉각하는 관점에서 이 방법이 기능상 우수함을 보여 주었다.

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자동차 엔진냉각계의 해석 프로그램의 개발 (Development of Simulation Program of Automotive Engine Cooling System)

  • 배석정;이정희;최영기
    • 설비공학논문집
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    • 제15권11호
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    • pp.943-956
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    • 2003
  • A numerical program has been developed for the simulation of automotive engine cooling system. The program determines the mass flow rate of engine coolant circulating the engine cooling system and radiator cooling air when the engine speed is adopted by appropriate empirical correlation. The program used the method of thermal balance at individual element through the model for radiator component in radiator analysis. This study has developed the program that predicts the coolant mass flow rate, inlet and outlet temperatures of each component in the engine cooling system (engine, transmission, radiator and oil cooler) in its state of thermal equilibrium. This study also combined the individual programs and united into the total performance analysis program of the engine cooling system operating at a constant vehicle speed. An air conditioner system is also included in this engine cooling system so that the condenser of the air conditioner faces the radiator. The effect of air conditioner to the cooling performance, e.g., radiator inlet temperature, of the radiator and engine system was examined. This study could make standards of design of radiator capacity using heat rejection with respect to the mass flow rate of cooling air. This study is intended to predict the performance of each component at design step or to simulate the system when specification of the component is modified, and to analyze the performance of the total vehicle engine cooling system.

홀 센서 기반 전자식 엔진냉각제어 시스템 설계 (Design of Hall Sensor based Electronic Engine Cooling System)

  • 고영호;김현희;이경창
    • 한국산업융합학회 논문집
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    • 제20권4호
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    • pp.325-332
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    • 2017
  • The engine cooling system is a device that maintains the temperature in the engine room at an appropriate level by driving a cooling fan when the temperature in the engine room generated during the vehicle operation occurs over a certain temperature. In recent years, the vehicle cooling system has changed to an electronic system. Therefore, in this paper, we design and develop a hall sensor based electronic engine cooling system. In this paper, a hall sensor module and an actuator module for engine cooling control system are designed. In order to verify the performance of the designed module, the magnetic field control was verified through the simulation of the diameter and the head of the coil.

감압냉각장치를 이용한 다이캐스팅 금형의 냉각성능평가 (Evaluation of Diecasting Mold Cooling Ability by Decompression Cooling System)

  • 김억수;박주열;김용현;손기만;이광학
    • 한국주조공학회지
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    • 제29권5호
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    • pp.238-243
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    • 2009
  • This study has been carried out to investigate the cooling ability improvement of diecasting mold by decompression cooling system. The decompression cooling system was applied to the new/used oil pump cover molds. The temperature of the surface mold applied the decompression cooling system fell to 15 degrees, especially in case of the used mold. The defect ratio of the oil pump cover manufactured by decompression cooling system has decreased from 2.8 percent to 0.2 percent. According to the results of the cooling ability improvement of diecasting mold by decompression cooling system, the decompression degree and supply pressure were set up the control item to apply the decompression cooling system to the diecasting mold in the industry field.

수소충전용 직접 및 간접 냉각시스템 비교 평가 연구 (The Study of Comparison of Cooling System for H2 Discharge Station)

  • 이현찬;이종열;배찬효;허정호;전재영
    • 한국수소및신에너지학회논문집
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    • 제30권2호
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    • pp.163-169
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    • 2019
  • This study is a research to compare efficiency of new cooling system (chiller, pre-cooler) to that of the conventional system at the hydrogen refueling station (HRS). This study includes contents for thermodynamic comparison of cooling system for HRS and comparison of pros and cons of its components. So It is to establish design concept of cooling system of HRS supplying with fuel cell electric vehicle (FCEV). HRS is charging high pressure H2 (700 bar) to FCEV. However cooling system is need to prevent temperature rise in tank. This cooling system consists of pre-cooler and chiller system.

가솔린 엔진에서의 냉각수로의 전열량에 대한 연구 (A Study on the Heat Rejection to Coolant in a Gasoline Engine)

  • 류택용;신승용;이은현;최재권
    • 한국자동차공학회논문집
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    • 제5권6호
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    • pp.77-88
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    • 1997
  • The heat rejection to coolant is a dominant factor for building vehicle cooling system such as radiator and cooling fan. Since the vehicle cooling system also has effects on fuel consumption and noise, the study of heat rejection to coolant has been emphasized. However, the study on heat rejection to coolant has been mainly focused on the field that related to the characteristics of combustion and localized heat loss. It is no much of use in design for the entire cooling system because it is focused on such a specific point. In this work, the heat rejection rate to coolant for four different engines are obtained to derive a simple heat transfer empirical formula that can be applied to the engine cooling system design, and it is compared with the other studies. Also, to observe effects of engine operation factors and heat transfer factors on coolant, we measured the metal temperature and the heat rejection rate. The heat rejection to coolant does not depend significantly upon the coolant flowrate, but mainly upon the amount of air fuel mixture and the air fuel ratio as long as the composition of coolant does not change. The reduction of heat rejection to coolant did not effectively improve the fuel consumption, but was mostly converted to raise the exhaust gas temperature and the oil temperature.

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알루미늄 냉각 판을 이용한 하이브리드/전기차용 배터리 냉각시스템의 수치적 연구 (Thermal Analysis of a Battery Cooling System with Aluminum Cooling Plates for Hybrid Electric Vehicles and Electric Vehicles)

  • 백승기;박성진
    • 한국자동차공학회논문집
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    • 제22권3호
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    • pp.60-67
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    • 2014
  • The battery cells in lithium-ion battery pack assembled with high-capacity and high-power pouch cells, are commonly cooled with thin aluminum cooling plates in contact with the cells. For HEV/EV lithium-ion battery systems assembled with high-capacity, high-power pouch cells, the cells are commonly cooled with thin aluminum cooling plates in contact with the cells. Thin aluminum cooling plates are cooled by cold plate with coolant flow paths. In this study, the effect of the battery cooling system design including aluminum cooling plate thickness and various position of cold plate on the cooling performance are investigated by using finite element methods (FEM). Optimal cooling plate and cold plate design are proposed for improving the uniformity in temperature distributions as well as lowering average temperature for the cells with large capacities based on the simulation results.

Thermal Flow Analysis of Vehicle Engine Cooling System

  • Park, Kyoung-Suk;Won, Jong-Phil;Heo, Hyung-Seok
    • Journal of Mechanical Science and Technology
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    • 제16권7호
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    • pp.975-985
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    • 2002
  • This paper deals with theoretical model developed for analyzing the heat transfer of automotive cooling systems. The model has a modular structure which links various cooling system submodels. From the model, heat transfer rate of automotive cooling systems can be predicted, providing useful information at the early stages of the design and development. The aim of the study is to develop a simulation program for automotive cooling system analysis and a performance analysis program for analyzing heat exchanger. Heat release rate from combustion gas to coolant through the cylinder wall in engine cylinder was analysed by using an engine cycle simulation program. In this paper, details of each submodel are described together with the overall structure of the vehicle model.