Fuel Injection Nozzle Cooling Module for Diesel Engine Power Plant




Fuel injection nozzle cooling module used to provide continuous nozzle cooling water flow in HFO power plant used to cool down fuel Injection nozzle. It is very important to cool down the nozzle to reduce wear down of nozzle due to fuel combustion. Different components such as pump, water reservoir, expansion vessel, heat exchanger etc. installed in this module.

Fuel injection nozzle cooling unit-ELWA-DKW 3 L2
Fuel injection nozzle cooling unit-ELWA-DKW 3 L2
Description of the components:
Main components of nozzle cooling water module
Main components of nozzle cooling water module
  • Centrifugal Pump

  • Water Reservoir

  • Pressure Expansion Vessel

  • Heat Exchanger

  • Control Panel

  • Thermostat Valve

  • Inspection Glass

  • Inspection and Measuring Instruments

  • Venting Float Valve

  • Different Types of Valve

>>VIEW ALL COMPONENTS PICTURE<<

Description of Nozzle cooling unit:



There are two types of coolant media circuit. One is nozzle cooling circuit, another engine coolant circuit (to cool down nozzle cooling coolant).

Nozzle cooling water circuit
Nozzle cooling water circuit

Water reservoir preserves the cooling water from there a centrifugal pump draw coolant and pumped to the system. Centrifugal pump pumps the coolant through temperature control valve (thermostat valve) and heat exchanger.

Nozzle cooling unit-Heat exchanger & Engine coolent
Nozzle cooling unit-Heat exchanger & Engine coolent

The operation of the temperature control valve and the heat exchanger depends upon the temperature of the coolant returned from the engine. If the temperature is higher than the allowable limit for engine inlet, temperature control valve allows more coolant flow through the heat exchanger.

Fuel injection nozzle cooling unit
Fuel injection nozzle cooling unit



A pressure expansion vessel used to deal with thermal expansion of water as it heats up in fuel injection valve. This prevents water pressure from getting too high and maintain a stable pressure. A pressure relief valve also installed on the pressure vessel.

Fuel injection nozzle cooling unit-Pressure vessel
Fuel injection nozzle cooling unit-Pressure vessel

There is an inspection glass installed in the engine return pipeline. If the fuel mixed with the coolant, it will be visible in the sight glass.

Nozzle cooling unit for MAN B&W Engine
Nozzle cooling unit for MAN B&W Engine

Different types of valve installed in this unit to control the coolant flow. Different types of valves are nozzle cooling inlet and outlet shut off valve. Engine coolant (LT Water) inlet and outlet valve from heat exchanger, Filling and drain line valve etc.

In this module different inspection and measurement equipment’s installed. Pressure and temperature gauge (Thermometer), pressure transmitter etc.

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