How Does Diesel Generator Cooling System Work
by Starlight Generator dieselgeneratortechThe function of diesel generator cooling system is to keep the engine within the proper temperature range under
all operating conditions. The cooling system must prevent the engine from
overheating and prevent the engine from being too cold in winter. After the
engine is cold-started, the cooling system also ensures that the engine heats
up quickly and reaches the normal operating temperature as quickly as possible.
The cooling system is an important system to maintain the normal temperature of
the engine and ensure the normal operation of the engine.
The water cooling system
of the engine is a forced circulation water cooling system, that is, the pump
is used to increase the pressure of the coolant, and the forced coolant is
circulated in the engine. Such system includes water pump, radiator, cooling
fan, thermostat, water jacket in engine block and cylinder head, and other
attachments.
The forced circulation
type water cooling system uses a water pump to pressurize the cooling liquid of
the system to flow in the water jacket. The cooling water absorbs heat from the
cylinder wall, the temperature rises, the hot water flows upward into the
cylinder head, and then flows out from the cylinder head and into the radiator.
Due to the powerful blowing action of the fan, the air flows through the
radiator at a high speed from front to back, constantly taking away the heat of
the water flowing through the radiator. The cooled water is pumped back into
the jacket from the bottom of the radiator by the water pump. Water circulates
continuously in the cooling system.
The function of the fan
is to blow air through the radiator when the fan rotates, so as to enhance the
heat dissipation capacity of the radiator and accelerate the cooling speed of
the coolant.
The radiator core is the
core part of radiator and plays a major role in heat dissipation. The radiator
core is composed of a heat-dissipating tube, a heat sink, and upper and lower
main pieces. Thanks to its sufficient heat dissipation area, it ensures that
the necessary heat is dissipated from the engine to the surrounding atmosphere.
Moreover, the radiator core is made of a extremely thin metal and alloy with
good thermal conductivity, which enables the radiator core to achieve the
highest heat dissipation effect with the minimum quality and size. There are
many types of radiator cores, such as tube type, tube belt, and tube core type and so on. As shown in the figure, the
most common ones are tube type and tube belt.
The role of the thermostat
is to automatically change the flow rate and circulation route of the coolant
with the engine load and water temperature to ensure that the engine works at a
suitable temperature, reducing fuel consumption and wear of the machine. The
cooling water passes through the water pump-water jacket-thermometer- radiator,
and is also pressed by the water pump into the water jacket. The water flow
route is long and the heat dissipation intensity is large, which is called the
large circulation of the water cooling system. The cooling water passes through
the water pump-water jacket- thermometer without the radiator, but is directly
pressed by the water pump into the circulation of the water jacket. The water
flow route is short and the heat dissipation intensity is small, which is
called a small cycle of the water cooling system.
The thermostat is
generally placed at the water outlet of the engine. It is required that the
amount of leakage of the thermostat is small, and the flow area is large when
fully opened. Increasing the flow area of the thermostat can be achieved by
increasing the lift of the thermostat valve and increasing the diameter of the
valve. More advanced thermostats abroad increase the flow area by increasing
the valve lift, which can reduce the problems caused by increasing the diameter
of the thermostat valve and the tight seal. However, increasing the lift of the
thermostat requires higher technical requirements for the thermostat. Some
engines use two thermostats in parallel to increase the flow area of the
thermostat.
Starlight Power is one of leading diesel generators manufacturers in China, products cover Cummins, Perkins, Volvo, Deutz, Ricardo, Yuchai, Shangchai, Weichai and Wuxi, etc. Power range is from 20KW to 2500KW. If you are interested, contact us by email: sales@dieselgeneratortech.com
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Created on Jun 19th 2019 21:46. Viewed 380 times.