Publication Detail

Dynamic Assessment and Co-Simulation of Thermal Management Strategies aboard Naval Surface Ships

Thomas M. Kiehne
2011
26 pp.

The US Navy has committed to development of an all-electric ship (AES) that will incorporate significant advances in the areas of power management, advanced sensors and weaponry, reconfigurability, and survivability. Quantifying the close relationship between ship-board thermal, mechanical, and electrical sub-systems is of fundamental importance to understanding the nature of a large, integrated system like the AES.
Research efforts in support of this development have focused on physics-based, dynamic models of thermal components and subsystems that approximate, at the system-level, the notional architecture of an AES. This research has resulted in the development of a general purpose thermal management tool coded in C++ and known as the Dynamic Thermal Modelling and Simulation (DTMS) framework. The DTMS simulation environment provides the ability to model thermal systems and subsystems relevant to the AES. The summary presented here describes the modelling approach used in DTMS and provides several examples of its use in large, complex, system-level, dynamic simulations. These examples include:
• the thermal aspects of an integrated electric power system with component models for gas turbine engines, synchronous generators, motor converters, propulsion motors, and fixed-pitch propellers.
• a dynamic model for a 200-ton, vapour-compression, marine chiller incorporating two-phase flow and heat transfer that is coupled to thermal loads representing shipboard compartment thus allowing investigation of system response during full-load and part-load operation.
• a dynamic, co-simulation that links a thermally dependent electrical power distribution network, and its consequent transient heat loads, with a thermal resistive heat flow network that connects these loads to the thermal management network at the system-level.
Thus, a thermally dependent electrical network has been integrated into a thermal management simulation environment with the intent of replacing what are traditionally modelled as steady-state heat loads with dynamic, thermally dependent, electrical loads.

type: Technical reports

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