3 results about "Exchange coefficient" patented technology

The invention discloses a method and device for monitoring ash dirt on a convection heating surface of a boiler. The device comprises a sound wave guide tube, a sound wave receiver, a sound wave generator, a signal conditioner, a junction box, an input and output device, a power amplifier and an industrial personal computer. The method comprises the steps of: firstly, sending a sound wave signal by the industrial personal computer, amplifying with the power amplifier and then sending to the sound generator; secondly emitting sound wave by the wave generator, spreading the sound wave to a hearth of the boiler through the sound wave guide tube, receiving a sound wave return signal of the hearth of the boiler by the sound wave receiver, transmitting the sound wave return signal to the industrial personal computer; thirdly, measuring sound wave crossing time by the industrial personal computer, and solving the smoke side temperature of the boiler; and finally, solving an actual heat exchange coefficient and obtaining an ash dirt coefficient. The invention adopts a non-contact measurement manner, and can be applied to environments with high temperature and much dirt and pollution; and the device is simple in operation, and provides a clear and simple visualization interface.

A vaporization latent heat energy reuse system of a liquefied natural gas boat comprises a spiral gas channel. The spiral gas channel is arranged on the outer wall of a natural gas pressure reducing valve, an outlet of the spiral gas channel is communicated with a device needing cooling, and an inlet of the spiral gas channel is communicated with external air. The reuse system is simple in structure and low in manufacturing cost, the use ratio of latent heat energy of vaporization of liquefied natural gas is high, air resistance is increased by the spiral gas channel on the outer wall of the natural gas pressure reducing valve, gas-solid heat exchange coefficient is improved, the latent heat energy of vaporization of the liquefied natural gas is more efficiently used, so that a cabin is energy-saving and environment-friendly, the cabin temperature can be reduced as low-temperature air is led into the cabin, goods and materials can be kept fresh as the low-temperature air is led into a storage warehouse, energy consumption of a refrigerator carried by the boat is reduced, the low-temperature air is led into the cabin and can assist an air conditioner in cooling in hot weather, and the power and energy consumption of the air conditioner can be reduced.