UDM Tip Temperature Control Using Thermosyphon Effect 2020-28-0040
In today’s automobile industry where BS6 emission is posing a high challenge for aggregate development, cost control and with limited timeline. The main target is to provide the cooling system to have less impact on the in terms of cost, weight and to meet the challenging engineering requirement. Thus, the frugal engineering comes into the picture. This paper shows the application of thermosyphon principle for UDM injector cooling thereby reducing the rotation parts and power consumption such as an electric pump.
Thermosyphon is a method of passive heat exchange and is based on natural convection, which circulates a fluid without the necessity of a mechanical or electric pump. The natural convection of the liquid commences when heat transfer to the liquid gives rise to a temperature difference from one side of the loop to the other.
The Flow through the UDM is maintained by changing Temperature (hence density) of the fluid at one end using the forced convection and hence facilitates for effective thermosyphon. The main objective of the UDM cooling is to keep the injector tip temperature under control (i.e. <120 °C ) during all RWUP running condition with regeneration and service regeneration followed by hot-shutoff .