Experimental Evaluation of System Performance for a Machine Tool Cooler Using Inverter Driven Control

2011 ◽  
Vol 189-193 ◽  
pp. 4073-4076
Author(s):  
Fu Jen Wang ◽  
Kuei I Tsai ◽  
Tong Bou Chang ◽  
Hao Chuan Lee ◽  
Yu Jun Lin
Keyword(s):  
Machine Tool ◽  
Capillary Tube ◽  
Cooling Water ◽  
Cost Effective ◽  
Coolant Temperature ◽  
Cooling Water Temperature ◽  
Control Scheme ◽  
Expansion Valve ◽  
Tool Cooling ◽  
Dramatic Variation

Highly accurate manufacture in machining industry cannot be achieved without precise temperature control of the cooling water. However, the machine tool coolers are facing the control hunting of coolant temperature and the dramatic variation of heat load in high-accuracy machining. In this study, experimental investigation on inverter driven compressor for capacity control has been proposed. Effects of using capillary tube and thermostatic expansion valve along with inverter driven control scheme have been investigated comprehensively. Cooling performance and power consumption of the cooler system have been measured at different frequency (hertz) of inverter under specific cooling water temperature. The experimental results reveal that the inverter driven cooler is cost-effective and energy-efficient for high-precision machine tool cooling.

Research and Application of the Auto-Control Cooling System for the Diesel Engine

2013 ◽  
Vol 805-806 ◽  
pp. 1970-1974
Author(s):  
Hong Lei Pang ◽  
Cai Yun Zhu ◽  
Zhi Bin Ni ◽  
Yao Hua Wei
Keyword(s):  
Diesel Engine ◽  
Water Temperature ◽  
Cooling System ◽  
Cooling Water ◽  
Coolant Temperature ◽  
Saving Rate ◽  
Fuel Saving ◽  
Single Chip ◽  
Cooling Water Temperature ◽  
Operation Conditions

In order to solve the problem that the traditional cooling system cannot adjust the cooling water temperature to the different operation conditions of diesel engine, the auto-control cooling system is designed. Using it, the coolant temperature can be adjusted automatically by the single-chip which controls the transducer-controlled pump and the electronic dividing valve which replaces the thermostat. We use the thermal equilibrium bench to verify the figures, and the result is show that using the exhaust of generator heats the cooling water can shorten 13 minutes in starting process and the cooling water temperature adjusted automatically to the changing operation conditions of iesel can decrease the fuel consumption remarkably, the highest fuel saving rate reached 5.4%, the averagely fuel saving rate reached 3.6%.

scholarly journals Kaji teoritis EMS (Engine Management System) dengan variasi temperatur air pendingin dan beban kerja pada kondisi stasioner pada kendaraan Toyota Avanza

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Angga Wahyu Pramayudha ◽  
Gunarko Gunarko ◽  
Ardyanto Darmanto ◽  
F A Widiharsa
Keyword(s):  
Water Temperature ◽  
Cooling Water ◽  
Engine Performance ◽  
Engine Management System ◽  
Coolant Temperature ◽  
Air Conditioner ◽  
Idle Speed ◽  
Gasoline Consumption ◽  
Cooling Water Temperature ◽  
Power Steering

EMS is a control system on the engine to regulate the proper mixing of air and fuel, accurate ignition timing, and control of other systems on the engine, according to the conditions and workload of the vehicle. The EMS component consists of sensors, ECU, and actuator. Engine control is fully regulated by the ECU. After getting data from the sensor, the ECU sensor will signal the actuator to control the engine, so that the work of the engine can be controlled according to the conditions of the engine. The effect of the cooling water temperature sensor is very large at stationary (Idle Speed Control/ISC). This research method is carried out by varying the temperature of cooling water (Engine Coolant Temperature/ECT) to get the mass of gasoline, air mass, air fuel ratio, engine speed, ignition angle, and gasoline consumption at each ISC load. The results of the research and data processing show that gasoline consumption will decrease every time the cooling water temperature increases. The AC (Air Conditioner) load ranges from 1,123 x 10-2 to 2,164 x 10-2 kg/hour, the power steering load ranges from 6,311 x 10-3 to 9,482 x 10-3 kg/hour, the electrical load ranges from 6,608 x 10-3 to 7,876 x 10-3 kg/hour and without load ranges from 6,024 x 10-3 to 7,920 x 10-3kg/hour. From these data it can be concluded that the effect of the ECT sensor is very large on engine performance at stationary rotation (ISC).Keywords: Sensor, ECU, Actuator.

scholarly journals Reduction of CO2 Emissions in Steelmaking by Means of Utilization of Steel Plant Waste Heat to Stabilize Seasonal Cooling Water Temperature

2021 ◽  
Vol 13 (11) ◽  
pp. 5957
Author(s):  
Tomas Mauder ◽  
Michal Brezina
Keyword(s):  
Continuous Casting ◽  
Water Temperature ◽  
Co2 Emissions ◽  
Waste Heat ◽  
Cooling Water ◽  
Main Idea ◽  
Casting Process ◽  
Spray Cooling ◽  
Steel Plant ◽  
Cooling Water Temperature

Production of overall CO2 emissions has exhibited a significant reduction in almost every industry in the last decades. The steelmaking industry is still one of the most significant producers of CO2 emissions worldwide. The processes and facilities used at steel plants, such as the blast furnace and the electric arc furnace, generate a large amount of waste heat, which can be recovered and meaningfully used. Another way to reduce CO2 emissions is to reduce the number of low-quality steel products which, due to poor final quality, need to be scrapped. Steel product quality is strongly dependent on the continuous casting process where the molten steel is converted into solid semifinished products such as slabs, blooms, or billets. It was observed that the crack formation can be affected by the water cooling temperature used for spray cooling which varies during the year. Therefore, a proper determination of the cooling water temperature can prevent the occurrence of steel defects. The main idea is based on the utilization of the waste heat inside the steel plant for preheating the cooling water used for spray cooling in the Continuous Casting (CC) process in terms of water temperature stabilization. This approach can improve the quality of steel and contribute to the reduction of greenhouse gas emissions. The results show that, in the case of billet casting, a reduction in the cooling water consumption can be also reached. The presented tools for achieving these goals are based on laboratory experiments and on advanced numerical simulations of the casting process.

Optimize Mixing Process Parameters of Synchronous Rotor Mixer Based on Orthogonal Method

2012 ◽  
Vol 501 ◽  
pp. 442-447
Author(s):  
Ping Fu ◽  
Feng Bao Bai ◽  
Chuan Sheng Wang ◽  
Shan Hu Li
Keyword(s):  
Physical Properties ◽  
Process Parameters ◽  
Fill Factor ◽  
Cooling Water ◽  
Mixing Process ◽  
Rotor Speed ◽  
Orthogonal Method ◽  
Cooling Water Temperature ◽  
Vulcanized Rubber ◽  
The Relationship

In this paper adopting the orthogonal method, self-developed compound formulation had tested, and the relationship between the physical properties of vulcanized rubber and rectangular synchronous rotor mixer parameters had researched. The results showed that when the fill factor was 0.6, the rotor speed was 70r/min, cooling water temperature was 45 °C, pressure on the top bolt was 0.8Mpa, the physical properties of the vulcanized rubber was best.

Effect of Water Temperature on Spray Cooling Heat Transfer on Hot Steel Plate

2010 ◽  
Author(s):  
Jungho Lee ◽  
Cheong-Hwan Yu ◽  
Sang-Jin Park
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Water Temperature ◽  
Steel Plate ◽  
Cooling Water ◽  
Local Heat ◽  
Spray Cooling ◽  
Transfer Coefficients ◽  
Cooling Water Temperature ◽  
Local Heat Flux

Water spray cooling is an important technology which has been used in a variety of engineering applications for cooling of materials from high-temperature nominally up to 900°C, especially in steelmaking processes and heat treatment in hot metals. The effects of cooling water temperature on spray cooling are significant for hot steel plate cooling applications. The local heat flux measurements are introduced by a novel experimental technique in which test block assemblies with cartridge heaters and thermocouples are used to measure the heat flux distribution on the surface of hot steel plate as a function of heat flux gauge. The spray is produced from a fullcone nozzle and experiments are performed at fixed water impact density of G and fixed nozzle-to-target spacing. The results show that effects of water temperature on forced boiling heat transfer characteristics are presented for five different water temperatures between 5 to 45°C. The local heat flux curves and heat transfer coefficients are also provided to a benchmark data for the actual spray cooling of hot steel plate cooling applications.

scholarly journals Impact of the Engine Tuning on its Technical Condition Assessment Based on Limited Number of Available Parameters

2018 ◽  
Vol 1 (1) ◽  
pp. 721-728
Author(s):  
Marek Łutowicz
Keyword(s):  
Fuel Injection ◽  
Cooling Water ◽  
Technical Condition ◽  
Technical State ◽  
Injection Timing ◽  
Injection Equipment ◽  
Cooling Water Temperature ◽  
Exhaust Temperature ◽  
Marine Diesel ◽  
Engine Components

Abstract Due to the limited scope of the diagnostic equipment on the ship, the technical condition of the engine is based on the measurement of pressure and temperature at the available measuring points. Usually it is the exhaust temperature at the outlet of individual cylinders, supercharging pressure, oil temperature and cooling water temperature. Sometimes the bearing temperature and turbocharger speed are also measured. Normally, if the engine is adapted to this, the maximum combustion pressure is measured periodically although distorted through the channels with the indicator valves. The paper presents examples of the exploitation of marine diesel engines, where there is a discrepancy between the actual technical state of the engine and the technical state of the engine based on the traditional diagnostic method based on a limited set of available parameters. These discrepancies resulted, inter alia, from the regular fuel injection timing and fuel dose adjustment, so that the measured parameters were adequate to the actual load of the engine. This adjustment is justified, but leads to masking engine components wear symptoms. In this situation, it can only be stated that the state of the fuel injection equipment is suitable for the current technical state of the some engine components and does not provide a sufficient basis for the extension of the repair interval.

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