Thermoelectric self-cooling for power electronics: Increasing the cooling power

Thermoelectrics for Cooling Power Electronics

To increase the efficiency and reduce emissions, the hybrid electric vehicle (HEV), fuel cell vehicle (FCV), and electric vehicle (EV) types were developed. All these vehicle types rely on power electronics (PEs) to function. Yet, the reliability and performance of PEs are directly related to the operating temperature. Therefore, cooling is considered an option to reduce the operating temperatu...

Embedded Thermoelectric Devices for On-chip Cooling and Power Generation

The Cooling Power of the Pigeon Head

Resting pigeons preheated to a stable core temperature of 43.2 °C, which is within the range of body temperatures recorded during flight, were able to cool their body at high rates if their head and upper neck were exposed to an air stream at 23.5 °C. The heat dissipation capacity of the head and neck, estimated from measurements made at a wind speed (100 km h-1) corresponding to fast f...

The Cooling Power of Pigeon Legs

The rate of heat loss from legs and feet (HLEG) w a s studied in resting pigeons preheated to a body temperature (43-l°C) close to those recorded during flight. The experimental system was designed to allow the calculation of HLEG from whole-body cooling rates following exposure of the legs and feet to various combinations of wind speed (0-75 km h") and air temperature (5-25 °C). The pigeons re...

Reliability Model of Power Transformer with ONAN Cooling

Reliability of a power system is considerably influenced by its equipments. Power transformers are one of the most critical and expensive equipments of a power system and their proper functions are vital for the substations and utilities. Therefore, reliability model of power transformer is very important in the risk assessment of the engineering systems. This model shows the characteristic...