scholarly journals Influence of the distance from an obstacle to the outlet pipe of the radiator fan case of the automotive engine cooling system on the distribution of air flow

2021 ◽  
Vol 18 (5) ◽  
pp. 143-149
Author(s):  
N. V. Holshev ◽  
◽  
D. N. Konovalov ◽  
S. M. Vedishchev ◽  
A. V. Milovanov ◽  
...  
Keyword(s):  
Cooling System ◽  
Air Flow ◽  
Flow Distribution ◽  
Response Surfaces ◽  
Laboratory Installation ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Outlet Pipe ◽  
Optimal Distance ◽  
Air Flow Velocity

The article presents the methodology and results of the study of the influence of the distance from the obstacle to the cut of the outlet pipe of the fan case of the cooling system of the automobile engine on the nature of the air flow distribution in front of the radiator. The studies were carried out on a specially made laboratory installation that provides measurement of the air flow velocity at fixed points in front of the radiator. As a result of the research, there were obtained response surfaces that describe the distribution of the air flow in front of the radiator at different distances from the obstacle to the outlet of the fan case. On this basis, there was determined the optimal distance from the obstacle, which provides the most uniform radiator blowing.

scholarly journals EXPERIMENTAL DETERMINATION OF THE AIR FLOW VELOCITY DISTRIBUTION IN FRONT OF THE RADIATOR OF A CAR COOLING SYSTEM

2021 ◽  
pp. 81-90
Author(s):  
N.V. Kholshev ◽  
◽  
D.N. Konovalov ◽  
Yu.E. Glazkov ◽  
◽  
...  
Keyword(s):  
Flow Velocity ◽  
Research Methodology ◽  
Internal Combustion Engines ◽  
Supply Voltage ◽  
Cooling System ◽  
Air Flow ◽  
Response Surfaces ◽  
Engine Cooling ◽  
Air Flow Velocity ◽  
Flow Velocities

The growth of environmental and economic requirements for the performance properties of internal combustion engines makes it necessary to constantly improve them. One of the ways to improve the design of engines is to improve the performance of its cooling system, which determines the stability of its thermal regime, on which the engine life and performance indicators directly depend. To increase the efficiency of the cooling system, you can increase the speed of the air flow flowing through the radiator and created by the fan. Flow velocity can be increased by reducing the aerodynamic drag in the air path of the engine cooling system. To do this, you need to know the actual distribution of air flow velocities in front of the radiator at its various points. The purpose of this work was to experimentally determine the air flow rates in front of the radiator at its various points at different values of the supply voltage. In accordance with the developed research methodology, a laboratory installation was developed that allows you to place the radiator assembly with the fan unit and determine the speed of the air flow in front of it with reference to its specific points, measure the speed of rotation of the fan blades and the power consumed by its engine. As a result of experimental studies, approximating response surfaces were constructed that describe the distribution of air flow velocities in front of the radiator at different values of the supply voltage, and the influence of the supply voltage values on the change in the amount of power consumed by the fan motor was established. As a result of the analysis of the data obtained, it was found that a slight decrease in voltage does not reduce the blowing area, but somewhat reduces the air flow rate, which can negatively affect the cooling of the engine itself by the air flow coming out of the fan. The scientific novelty of this work is the experimentally obtained distributions of the values of the air flow velocity in front of the radiator and the research methodology. The research results can be used to improve the efficiency of the fan installation of the engine cooling system. The direction of further research is to study the influence of the resistances at the outlet of the radiator fan casing on the distribution pattern and the air flow velocity.

Air flow distribution measurement of the vehicle cooling system test rig

2019 ◽  
Author(s):  
J. H. Lee ◽  
Z. A. Latiff ◽  
M. R. M. Perang ◽  
M. F. M. Said
Keyword(s):  
Cooling System ◽  
Air Flow ◽  
Flow Distribution ◽  
Test Rig ◽  
Distribution Measurement

scholarly journals The effect of evaporative cooling on climatic parameters in a stable for sows

2014 ◽  
Vol 60 (Special Issue) ◽  
pp. S85-S91 ◽  
Author(s):  
Ľ. Botto ◽  
J. Lendelová ◽  
A. Strmeňová ◽  
T. Reichstädterová
Keyword(s):  
Flow Velocity ◽  
Indoor Air ◽  
Cooling System ◽  
Air Flow ◽  
Evaporative Cooling ◽  
Apparent Temperature ◽  
Climate Index ◽  
Pressure System ◽  
Indoor Air Flow ◽  
Air Flow Velocity

The aim of this study was to find out the effect of indirect evaporative cooling on microclimatic parameters in a stable for sows. A high-pressure system was used for cooling, the nozzles sprayed water into the outside air before its entering into the building. Temperature-humidity index during cooling was higher by 0.9 than in the section without cooling (P < 0.001). Due to low indoor air flow velocity (below 0.18 m/s), a change in apparent temperature by the Comprehensive Climate Index (CCI) was only 1.94°C. It would be possible to provide markedly better cooling effectiveness by increasing the air velocity up to 2 m/s, which may improve the CCI by 19.8% and thus to achieve better environmental conditions for housed sows. The efficiency of evaluated evaporative cooling system was moderate because the nozzles were placed outdoors and only part of humidified and cooled air was drawn into the building through inlet openings, and also because the indoor air-flow velocity was low.

scholarly journals A review of evaporative cooling system concepts for engine thermal management in motor vehicles

2016 ◽  
Vol 231 (8) ◽  
pp. 1126-1143 ◽  
Author(s):  
Soheil Jafari ◽  
Julian F Dunne ◽  
Mostafa Langari ◽  
Zhiyin Yang ◽  
Jean-Pierre Pirault ◽  
...  
Keyword(s):  
Thermal Management ◽  
Carbon Dioxide Emissions ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Motor Vehicles ◽  
Past Century ◽  
Cooling Systems ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Evaporative Cooling System

The evaporative cooling system concepts proposed over the past century for engine thermal management in automotive applications are examined and critically reviewed. The purposes of this review are to establish the evident system shortcomings and to identify the remaining research questions that need to be addressed to enable this important technology to be adopted by vehicle manufacturers. Initially, the benefits of the evaporative cooling systems are restated in terms of the improved engine efficiency, the reduced carbon dioxide emissions and the improved fuel economy. This is followed by a historical coverage of the proposed concepts dating back to 1918. Possible evaporative cooling concepts are then classified into four distinct classes and critically reviewed. This culminates in an assessment of the available evidence to establish the reasons why no system has yet been approved for serial production commercially. Then, by systematic examination of the critical areas in evaporative cooling systems for application to automotive engine cooling, the remaining research challenges are identified.

A Methodology of an Automotive Engine Cooling Using a Phase Change Material

2009 ◽  
Author(s):  
Kibum Kim ◽  
Kyung-wook Choi ◽  
Ki-hyung Lee ◽  
Kwan-soo Lee
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Heat Load ◽  
Cooling System ◽  
Heat Accumulator ◽  
Full Size ◽  
Automotive Engine ◽  
Excessive Heat ◽  
Engine Cooling ◽  
Change Material

The size of a cooling inventory is generally designed based on which size can endure the excessive heat load situations that occur sporadically. As a result, cooling systems are often too large for most normal driving modes. There have been numerous efforts to downsize the automotive engine cooling system using novel concepts and strategies (e.g. THEMIS cooling system, CoolMaster, UltimateCooling). However, in terms of the system design, preserving the passive cooling strategy may be simpler and more practical than implementing any major changes. Vetrovec (2008) proposed the use of a heat accumulator that has a phase change material (PCM) within the automotive cooling system. Excessive heat generated during severe operating conditions is stored in the heat accumulator, and it is dissipated during periods of low heat load. The heat dissipation capacity of the radiator and the amount of coolant in the cooling system are normally designed such that the system can sustain itself at peak heat load during acceleration and hill ascents in hot summer periods. Therefore, the unnecessarily large cooling inventory creates an overloaded vehicle which increases the fuel consumption rate. A heat accumulator which averages out the peak heat loads can reduce the entire cooling system remarkably in terms of both its volume and weight. Effective cooling in automobiles is beneficial in reducing harmful emissions as well as improving fuel economy. A simulation was conducted to validate the feasibility of using a novel cooling strategy that utilized the heat load averaging capabilities of a phase change material (PCM). Three prototypes were designed: full size, down sized, and a down sized prototype with a heat accumulator containing the PCM inside. When the full size of the cooling inventory was downsized by 30%, this smaller design failed to dissipate the peak heat load and consequently led to a significant increase in the coolant temperature, around 25 °C greater than that in the full size system. However, the peak heat load was successfully averaged out in the downsized system with a heat accumulator. Experimental study is also on-going to validate the simulation results and find more suitable PCM for the application.

scholarly journals The investigation of the air flow distribution swirling by the rotating suction cylinder

2018 ◽  
pp. 56-60
Author(s):  
A. B. Gol'tsov ◽  
K. I. Logachev ◽  
O. A. Averkova ◽  
V. A. Tkachenko ◽  
I. V. Khodakov
Keyword(s):  
Velocity Distribution ◽  
Flow Velocity ◽  
Air Flow ◽  
Electrical Power ◽  
Flow Distribution ◽  
Rotation Frequency ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation ◽  
Aspiration System ◽  
Air Flow Velocity

The improvement of the local exhaust ventilation consists in the emission and pollution agents' concentration at the electrical power minimum expenses. The using of the rotating exhaust cylinder in the aspiration hoods can result in the reduction of both the dust loss into the aspiration system and the dust aerosol transportation costs in the air transfer ducts. We investigated the air flow velocity distribution near the rotating exhaust cylinder depending on the rotation frequency and vented air consumption. The obtained results can be applied when the local closed exhaust hoods designing, that is the designing of the aspiration hoods with the dust-collecting chambers.

Effect of Fan Speed on Air Flow Through a Green Wall Module

2018 ◽  
Author(s):  
Peter Abdo ◽  
B. P. Huynh ◽  
Vahik Avakian
Keyword(s):  
Cooling System ◽  
Air Flow ◽  
Flow Distribution ◽  
Active Systems ◽  
System A ◽  
Particulate Pollutants ◽  
Back Face ◽  
Flow Through ◽  
Fan Speed ◽  
Wall System

Green or living walls are active bio-filters developed to enhance air quality. Often, these walls form the base from which plants are grown; and the plant-wall system helps to remove both gaseous and particulate air pollutants. They can be classified as passive or active systems. The active systems are designed with ventilators which force air through the substrate and plant rooting system, therefore the air is purified and filtered through a bio-filtration process which also acts as a natural cooling system. A fan positioned at a central opening on the module’s back face drives air through the medium-plant-roots mix and then onward through the plants’ canopy; and these would help to remove both gaseous and particulate pollutants from the air. Pressure drop across the module, air flow distribution through it as well as the total flow rate have been obtained. The effect of different fan speeds on the total air flow and on its distribution through the module is investigated in this study in order to optimize the energy consumption of the fans whilst maintaining the modules biofiltration efficiency.

scholarly journals Experimental and Numerical Analysis of Air Flow, Heat Transfer and Thermal Comfort in Buildings with Different Heating Systems

2016 ◽  
Vol 53 (2) ◽  
pp. 20-30 ◽  
Author(s):  
A. Sabanskis ◽  
J. Virbulis
Keyword(s):  
Heat Transfer ◽  
Thermal Comfort ◽  
Heat Pump ◽  
Air Flow ◽  
Flow Distribution ◽  
Electric Heater ◽  
Heating Systems ◽  
Flow And Heat Transfer ◽  
Flow Heat ◽  
Air Flow Velocity

Abstract Monitoring of temperature, humidity and air flow velocity is performed in 5 experimental buildings with the inner size of 3×3×3 m3 located in Riga, Latvia. The buildings are equipped with different heating systems, such as an air-air heat pump, air-water heat pump, capillary heating mat on the ceiling and electric heater. Numerical simulation of air flow and heat transfer by convection, conduction and radiation is carried out using OpenFOAM software and compared with experimental data. Results are analysed regarding the temperature and air flow distribution as well as thermal comfort.

PERFORMANCE OF A WATER PUMP IN AN AUTOMOTIVE ENGINE COOLING SYSTEM

2016 ◽  
Vol 78 (10-2) ◽  
Author(s):  
Mohamad Lazim Mohamed Tasuni ◽  
Zulkarnain Abdul Latiff ◽  
Henry Nasution ◽  
Mohd Rozi Mohd Perang ◽  
Hishammudin Mohd Jamil ◽  
...  
Keyword(s):  
Cooling System ◽  
Maximum Power ◽  
Coolant Temperature ◽  
Electric Pump ◽  
Water Pump ◽  
Test Rig ◽  
Engine Operation ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Simulator Test

A cooling system employed in an automobile is to maintain the desired coolant temperature thus ensuring for optimum engine operation. Forced convection obtained by means of a water pump will enhance the cooling effect. Thus it is necessary to understand the system’s pump operation and be able to provide for the ultimate cooling of the engine. The objective of this laboratory investigation is to study the water pump characteristics of an engine cooling system. The crucial water pump parameters are the head, power, and its efficiency. In order to investigate the water pump characteristic a dedicated automotive cooling simulator test rig was designed and developed. All of the data obtained are important towards designing for a more efficient water pump such as electric pump that is independent of the power from the engine. In addition to this fact, the simulator test rig can also be used to investigate for any other parameters and products such as radiator performance and electric pump before installation in the actual engine cooling system. From the experiment conducted to simulate for the performance of a cooling system of a Proton Wira (4G15), the maximum power equals to 37 W which indicates the efficiency of the pump is relatively too low as compared to the typical power consume by the pump from the engine which are about 1 to 2 kW. Whereas the maximum power and efficiency obtained from the simulator test rig simulator is equals to 42 W and 15% respectively.

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