Plate type heat exchanging element for evaporation and condensation

Abstract

The invention discloses a plate type heat exchanging element for evaporation and condensation, belonging to the technical field of engineering thermophysics and energy and utilization. The heat exchanging element is characterized in that a specially designed strengthening heat transfer structure is arranged on the heat transfer zone of the element; a structure protruding to the condensation side plays a role of fixing and turbulence and a structure protruding to the evaporation side is in an inward depression configuration so as to form more corning points; a narrow seam with microscale effect, which is designed aiming at working liquid, is arranged between the structure and a flat bar; the height of the structure is an optimized value which is calculated according to characteristic values of detached diameter and capillary length of the working liquid, so as to cause generated bubbles to continuously absorb heat to grow up in the process of sliding between the flat bars after detaching from the coring points, thereby taking more heat away, updating the passed surfaces and accelerating liquid convection. The invention has the effects and benefits that the evaporative condenser consisting of the provided elements is in direct immersion type, and has the advantages of high heat transfer coefficient, convenient unpick and wash, uneasy corrosion and low energy consumption.

Description

technical field [0001] The invention belongs to the technical fields of engineering thermophysics and energy and utilization, and relates to a plate heat exchange element, in particular to a plate heat exchange element for evaporation and condensation, which can be applied to heat exchangers in distillation or refrigeration equipment . Background technique [0002] Phase change heat transfer is the most efficient heat transfer method today. Heat exchange equipment using phase change for heat exchange is widely used in many industrial fields such as refrigeration, air conditioning, petrochemical, electric power, seawater desalination and purification. During work, the high-temperature steam and the low-temperature liquid undergo a phase change process on both sides of the heat exchange element of the phase-change heat transfer device. The liquid evaporates to form steam after receiving heat. This type of equipment is also called an evaporative condenser. [0003] The well-k...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a plate-type heat exchange element that is easy to disassemble, not easy to corrode, low energy consumption, and high heat transfer coefficient, so as to solve the technical problems mentioned above: the main reason is that the heat transfer coefficient is low, the mechanical Poor sealing, difficult cleaning, many solder joints are easy to corrode, energy consumption of liquid conveying equipment and blockage of liquid distributor

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