ABSTRACT
This study was carried out on the environmental effect, cost and comfort problems of inter-cooler refrigeration on engine performance. An intercooler is an additional component fixed to a turbo charger to improve its performance and efficiency. It is similar to a radiator whereas a radiator cools the engine but a turbo intercooler cools the air which is fed into the engine. As the turbocharger engine running in long range, more hot air is compressed by turbo entered into intercooler. The temperature of intercooler at certain time will increase due to hot air entered, temperature engine and weather condition. Turbo Intercooler Cooling System are design operated automatically to detect the temperature increase at intercooler. When temperatures are increased, motor will trigger and sprinkler will spray water through intercooler. The system generally embedded in front of intercooler and generated by a control panel which are require 12 v power supply can directly attach from battery and tap on the circuit on which it converts to 5v by the circuit before connect to the controller. The system is powered by the Arduino Uno as the main controller on which being program to control automatically. The control panel also can operate in manually which a manual switch is attached to give choices to the user whether to choose auto or manual operating mode.Â
CHAPTER ONE
INTRODUCTION
1.1 Background of the Study
The low-speed two-stroke marine diesel engine comprises of the fixed part, the moving part, the distribution system, the fuel system, the lubrication system, the cooling system, the starting system, the speed regulation device, the reversing arrangement, and the supercharging system. Because of its good power performance, the fuel efficiency and the reliability, the modern merchant ship takes it to directly drive the propeller as a main propulsion system. Its performance has decided the entire ship’s power performance and economic performance. Controlling the intake swirl intensity is the principal means to solve the fuel oil efficiency and the emission question under the diesel engine’s different speed condition.
The invariable intake swirl system is applied in the low-speed diesel engine to study the oil atomization in the cylinder and the combustion process to the intake swirl intensity’s request under the different operating modes in order to realize the reasonable match of the intake swirl intensity with the fuel injection process. On the foundation of the twin inlet structure this report analyzed, the intake swirl control area and its influence to the gas charging efficiency proposed the design scheme for the invariable intake swirl control system. By matching reasonably, the intake, the exhaust, and the injection process of the diesel engine, the combustion process is further optimized to satisfy the target request for the complete machine’s power, fuel oil efficiency and emission. For the marine diesel engine, the fuel economy is one essential index.
Currently, using the electronically controlled fuel injection system with the common rail and the variable intake swirl control system to optimize the cylinder combustion process, the engine achieves the minimum fuel consumption close to 170g/kWh. Improving the cylinder combustion process has no significant potential to reduce the fuel consumption. The power consumption of the engine’s cooling system accounts for about 5% of the overall engine’s power, so improving the whole economy has enormous potential. Controlling the heat dissipation capacity of the cooling process at the different heat conditions to achieve the optimum combustion chamber temperature can not only improve the reliability, but also reduce the heat loss of the burning process and improve the thermal efficiency.
Reducing the water flow of the cooling pump in the partial load can lower the mechanical power loss of the cooling system to improve the whole economy. To achieve the reasonable match of the cooling system with the whole engine, the working process of the low-speed diesel engine is analyzed to determine the optimum heat dissipation required for the different conditions. The cooling system is designed, and the heat dissipation potential of the cooling system is analyzed in the different temperature and flow conditions to match reasonably the cooling system with the whole engine.
