Abstract: A method to measure the transient thermal diffusivity performance of a heat dissipation module by selecting two measurement points on the surface of the heat dissipation module, and locating the two measurement points at the same side of the thermal center point but different distances, and measuring the temperature of the two measurement points separately and using first equation which is the analytical solution of the energy equation. After calculating the first equation, second and third equations are used to find M. The distance X1 between M and the first measurement point and temperature T1 at a moment of transient state are also inserted into the first equation to obtain the value of the thermal diffusivity coefficient ?, which represents the transient thermal diffusivity performance for the heat dissipation module.

Abstract: A liquid-vapor composite heat dissipation system includes a heat exchange device filled with a working fluid, a number of liquid-vapor composite heat dissipation units that are positioned higher than the heat exchange device, each of the liquid-vapor composite heat sink units having a housing with an internal capillary occupying the interior of the housing and partially separating a spatially disconnected inlet chamber and an outlet chamber. The bottom of the housing is attached to a heat source. A liquid supply tube is connected to the heat exchange device at one end, and at the other end to a liquid inlet of each of the liquid-vapor composite heat sink units through each of the liquid supply pipes. A liquid return tube is connected to the heat exchange device at one end, and to each of the liquid-vapor composite heat sink units at the other end through each of the return pipes.

Abstract: A liquid-in and vapor-out composite liquid-vapor phase conversion heat dissipation device that includes a housing with a chamber connected to an inlet and outlet; a capillary structure in the chamber for maintaining a predetermined distance from the inlet and outlet, and separating the chamber into an liquid inlet chamber and a vapor outlet chamber. The liquid inlet chamber is spatially connected to the inlet, and the vapor outlet chamber is spatially connected to the outlet. A drainage structure located at the top surface of the bottom of the housing is affixed to the bottom of the capillary structure for diverting liquid from the liquid inlet chamber to the underside of the capillary structure. The bottom surface of the bottom of the housing is affixed to a heat source, and when the heat source is attached, the drainage structure is located above the heat source.

Abstract: A fan logic evaluation device and method thereof for improving the logic evaluation of a fan. Specifically, a fan logic evaluation device is provided by first installing a fan, which corresponds to a set of parameters, in a wind tunnel device. A computer then performs a logic evaluation to convert the set of parameters into an evaluated pressure-flow curve and a measured pressure-flow curve by measuring the fan's operating conditions with the wind tunnel device. The computer further performs a logic modification to correct the logic evaluation to obtain a logic evaluation modification. The logic evaluation is then replaced by the logic evaluation modification. Finally, the above process is repeated with the same fan or a different fan.

Abstract: A method to measure the transient thermal diffusivity performance of a heat dissipation module by selecting two measurement points on the surface of the heat dissipation module, and locating the two measurement points at the same side of the thermal center point but different distances, and measuring the temperature of the two measurement points separately and using first equation which is the analytical solution of the energy equation. After calculating the first equation, second and third equations are used to find M. The distance X1 between M and the first measurement point and temperature T1 at a moment of transient state are also inserted into the first equation to obtain the value of the thermal diffusivity coefficient ?, which represents the transient thermal diffusivity performance for the heat dissipation module.

Abstract: A thermal diffusivity performance measurement system is configured to measure a temperature of a pillar. The thermal diffusivity performance measurement system has a temperature sensor and a calculation unit. The temperature sensor is disposed at the pillar and configured to measure the temperature of the pillar. The calculation unit is configured to calculate a ratio of heat conduction to convection intensity per unit conduction intensity and a dimensionless time based on the measuring results of the temperature sensor.

Abstract: A thermal diffusivity performance measurement system is configured to measure a temperature of a pillar. The thermal diffusivity performance measurement system has a heater, a temperature sensor and a calculation unit. The heater is configured to heat the pillar. The temperature sensor is disposed at the pillar and configured to measure the temperature of the pillar. The calculation unit is connected to temperature sensor. The calculation unit is configured to calculate a ratio of heat conduction to convection intensity per unit conduction intensity and a dimensionless time based on the measuring results of the temperature sensor.

Abstract: A vehicle occupant protection system in one embodiment includes a control device disposed in a front portion of a vehicle body; a plurality of first sensors mounted in the front portion of the vehicle body; two first actuators each mounted under a front seat equipped with a first seat belt; and a second actuator mounted under a rear seat equipped with a plurality of second seat belts; wherein each of the first sensors is adapted to detect a vehicle crash and send an activation signal to the control device when it occurs, and the activated control device is adapted to activate the first and second actuators to pivot the front and rear seats upward a predetermined angle to push seated vehicle occupants rearward.

Abstract: A vehicle occupant protection system in one embodiment includes a control device disposed in a front portion of a vehicle body; a plurality of first sensors mounted in the front portion of the vehicle body; two first actuators each mounted under a front seat equipped with a first seat belt; and a second actuator mounted under a rear seat equipped with a plurality of second seat belts; wherein each of the first sensors is adapted to detect a vehicle crash and send an activation signal to the control device when it occurs, and the activated control device is adapted to activate the first and second actuators to pivot the front and rear seats upward a predetermined angle to push seated vehicle occupants rearward.