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The paper deals with analysis of temperature rise in a fuel cell module using the CFD numerical model. The module is based on a low-temperature fuel cell with polymer electrolytic membrane. There is a simulation of stable condition, when the cell supplies constant output and the system generates waste heat exhausted through the cooling fins. The aim of analysis was to find potential problematic spots...
This paper presents a detailed cooling approach for traction motors which are mounted in hybrid electric vehicle (HEV) or battery electric vehicle (BEV). There are specific guidelines for the design of a traction motor in hybrid drives, such as the small and restricted packing area and on the other side, the need for a high power — and torque — density. For this vehicle powertrain application the...
This paper presents new cooling methods for permanent magnet synchronous machines (PMSM) with flux barriers. For a vehicle powertrain application the permanent magnet synchronous machines is a very popular choice, because of high power density, a high efficiency and the small package. However, this machine is susceptible to suffer insulations failures of coils and demagnetization of magnets under...
This paper presents a new cooling approach for traction motors which are mounted in hybrid electric vehicle (HEV) or battery electric vehicle (BEV). For this vehicle powertrain application the permanent magnet synchronous machines (PMSM) is a very popular choice, because of high power density, a high efficiency and the small package. However, this machine is susceptible to suffer insulations failures...
We present a simplified model for predicting key data-center temperatures, such as those of rack inlets and cooler returns. If the primary airflow streams into and out of all racks and coolers are known, these airflow values can be combined with the assumption of a well-mixed room ambient volume to create a simplified, but energy-balanced, set of temperature equations. Since the temperature estimates...
Advances in server technology have resulted in the cost of acquiring server equipment trending down, while economies of scale in data centers have significantly reduced the cost of labor. This leaves the cost of the energy as the next target for optimization. Energy costs are driven by operating the IT equipment, the switchgear that provides uninterrupted power to the equipment, and in cooling the...
A Polymer Electrolyte Membrane (PEM) fuel cell is an electrical power generator utilizing a hydrogen-based fuel reactant and oxygen in a reversed electrolysis reaction, with byproducts of water and heat. The application is sensitive to temperature; more power is generated at elevated operating temperatures, but excessive cell temperature causes dehydration to the membrane electrolyte and subsequent...
The purpose of this paper is to numerically analyze the three-dimensional fluid motion and temperature distribution in built-in motorized high-speed spindle housing having axial water cooling channel with rectangular crossection. A three dimensional finite element model of high speed spindle housing is developed and simulated using computational fluid dynamics software to determine the temperature...
Modern AC traction locomotives, are characteristic of miniaturization, increasing switching frequency and increasing packaging densities, require increased current handling capability of packaged devices in applications related to power conversion. These ever-increasing demands pushed the efficiency of silicon semiconductor power-device to the limit. The heat dissipation in the power system must be...
The power density as well as the absolute power consumption in telecommunication equipment keep on increasing continuously. In new generation platforms like ATCA (advanced telecommunications computing architecture) up to 16 boards with up to 300 W heat dissipation each can be used in a 19" rack. A typical cooling for such an equipment uses fan trays with the fans forcing the air flow through...
Liquid cooling is currently one of the best and most immediate options for non uniform heat sources, high performance CPU/GPU. One of the main drawbacks of this alternative is that many customers may not be very enthusiastic to install a device that could some how leak into their computers. This project intends to develop a new generation liquid cooling system that is leakage-free. This paper presents...
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