Effect of cooling water temperature and space between cooling pipes of post-cooling system on temperature and thermal stress in mass concrete

2019 ◽  
Vol 24 ◽  
pp. 100731 ◽  
Author(s):  
Adek Tasri ◽  
Anita Susilawati
Keyword(s):  
Thermal Stress ◽  
Water Temperature ◽  
Cooling System ◽  
Cooling Water ◽  
Mass Concrete ◽  
Cooling Water Temperature ◽  
Cooling Pipes

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%.

Influence of the temperature of the cooling water on the deaeration capacity in the KСS-200-2 condenser

2020 ◽  
pp. 7-18
Author(s):  
A.D. Vodeniktov ◽  
◽  
N.D. Chihirova ◽  
Keyword(s):  
Dissolved Oxygen ◽  
Water Temperature ◽  
Steam Turbine ◽  
Cooling System ◽  
Cooling Water ◽  
Vacuum System ◽  
Water Cooling ◽  
Cooling Water Temperature ◽  
Surface Condenser ◽  
Steam Turbine Condenser

In this paper, the results of the steam turbine condenser tests showing the dependence of the dissolved oxygen concentration and the water cooling temperature are presented. The steam surface condenser with the water cooling system is considered as the first stage of deaeration in the feedwater system of a steam turbine. The aim of this work is trying to investigate and describe the influence of regime factors on the deaeration effect of the steam surface condenser. Regimes with the nominal flow of the steam in the surface condenser were chosen for the estimation. The tests were continuing for 6 months in the range of the temperature of cooling water from 1 to 25 оС. The vacuum system of the steam turbine had a high level of air leakages that decreasing the efficiency of the feedwater dearation. The results show the negative correlation between dissolved oxygen in feedwater and the cooling water temperature. The surge of the concentration of dissolved oxygen was found in the water temperature about 11оС.

scholarly journals Analysis of a New Dissipation System for a Solar Cooling Installation

2010 ◽  
Vol 2010 ◽  
pp. 1-6
Author(s):  
Carlos Monné Bailo ◽  
Sergio Alonso Garcés ◽  
Fernando Palacín Arizón
Keyword(s):  
Water Temperature ◽  
Cooling System ◽  
Cooling Water ◽  
Absorption Chiller ◽  
Geothermal Heat ◽  
Solar Absorption ◽  
Cooling Water Temperature ◽  
Solar Cooling ◽  
Flat Plate Collector ◽  
The University

This paper describes a solar absorption cooling installation located at the University of Zaragoza (Spain). The installation is based on the performance of an absorption chiller. The solar cooling system consists of 37,5 m2 of flat plate collector, a 4.5 kW, single-effect LiBr-H2O absorption chiller, and a dry cooling tower. The installation provides cooling to a gymnasium belonging to the sports center of the university. To carry out the installation analysis, the system was continuously monitored. In 2007, 2008 and 2009, several studies have been performed in order to analyze the full system operation. The measured data showed the strong influence of the cooling water temperature and the generator driving temperature on the COP. Due to the experimental evidence of the influence of the cooling water temperature, a new heat rejection system based on a geothermal heat sink has been installed and studied.

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.

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.

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