Experimental Analysis and Evaluation of Thermostat Effects on Engine Cooling System  

作　　者：GHASEMI ZAVARAGH Hadi KALELI Alirlza SOLMUS Ismail AFSHARI Faraz 

机构地区：[1]Department of Mechanical Engineering,Faculty of Al-ghadir,Zanjan Branch,Technical and Vocational University(TVU),Tehran 14357,Iran [2]Department of Electrical and Electronic Engineering,Engineering Faculty,Samsun University,Samsun 55080,Turkey [3]Department of Mechanical Engineering,Ataturk University,Erzurum 25240,Turkey [4]Department of Mechanical Engineering,Erzurum Technical University,Erzurum 25240,Turkey

出　　处：《Journal of Thermal Science》2021年第2期540-550,共11页热科学学报（英文版）

基　　金：This work was supported by The Scientific and Technological Research Council of Turkey(TUBITAK,project no 315M260)。

摘　　要：Thermostat as a part of engine cooling system has a significant role in the shortening warm-up time and regulating the engine in proper temperature to approach optimal performance.Whereas,there is not adequate research on this part of the cooling system and its responsibility.Considering this gap and also being used in large scale,this study is intended to evaluate performance and reflex of the wax type thermostat in different engine working conditions.In this regard,performance of engine cooling system was investigated in various engine speeds and loads to reveal positive and negative influences of thermostat on engine cooling efficiency and engine performance.According to observed results,warm-up period and fuel consumption decrease by using a thermostat.On the other hand,however,the temperature oscillation of coolant fluid passing through engine increases sharply,which causes a disruption in the regulating engine temperature and also a possibility of the fluid boiling rises in some regions of the engine that increases the risk of damage in the engine parts.Engine temperature,fuel consumption,warm-up duration and emissions were provided and compared in two operation modes,with and without thermostat.

关 键 词：engine cooling system wax type thermostat WARM-UP RADIATOR EMISSIONS fuel consumption 

分 类 号：TK403[动力工程及工程热物理—动力机械及工程]