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A Method for Determining Equivalent Heat Transfer Coefficient of Heat Pipe Embedded in Pendulum Plowstock

A technology of equivalent heat transfer coefficient and heat pipe, applied in the field of effective heat transfer coefficient, can solve the problems of low precision, heat pipe thermal resistance does not consider the actual use environment, and data reference is not large.

Active Publication Date: 2021-07-09
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermal resistance method, the calculation process is complicated; formula method, the accuracy is low
More importantly, the thermal resistance of the heat pipe determined by the above two methods does not take into account the specific actual use environment, and the final data obtained are of little reference in actual work

Method used

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  • A Method for Determining Equivalent Heat Transfer Coefficient of Heat Pipe Embedded in Pendulum Plowstock
  • A Method for Determining Equivalent Heat Transfer Coefficient of Heat Pipe Embedded in Pendulum Plowstock
  • A Method for Determining Equivalent Heat Transfer Coefficient of Heat Pipe Embedded in Pendulum Plowstock

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: Equivalent conduction coefficient K of heat pipe under air-cooled conditions eff calculation

[0034] The present invention provides a method for determining the equivalent heat transfer coefficient of a heat pipe embedded in a pendulum plow chest, comprising the following steps:

[0035] S1. Since soil density and water content are the main factors that determine the heat transfer effect of soil, especially related to water content, it is necessary to change the soil properties, and the change of soil properties is mainly realized by adjusting the water content. For example, Table 1 is the soil parameters of Xinjiang, and Table 2 is the soil parameters of Jianghuai. It can be seen that the density of Xinjiang soil and Jianghuai soil is not much different. The main difference is the water content. Therefore, adjusting the water content of Jianghuai soil is the key to simulate Xinjiang soil. Factors, the method of adjustment is: take an appropriate amount ...

Embodiment 2 3 4

[0048] A method for determining the equivalent heat transfer coefficient of a heat pipe embedded in a pendulum plow chest, the steps of which are basically the same as those in Embodiment 1, except for:

[0049] The condensation section of the heat pipe is closely connected to the cooling block for testing. When the cooling block is tested, the temperature acquisition module is respectively connected to the evaporation section of the heat pipe and the cooling block installed on the heat pipe through two K-type thermocouple temperature measuring wires, and repeats step S2 From steps b to c and then to S3, measure the limit P of the heat pipe max value as well as the T of the heat pipe h and T c value, then according to the formula K eff =μ·λ·P in ·L / [(T h -T c ) · A] to obtain the equivalent heat transfer coefficient K of the heat pipe under the condition of the cooling block eff value.

[0050] The cooling block can adopt an iron block, and the iron block is closely con...

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Abstract

The invention discloses a method for determining the equivalent heat transfer coefficient of a heat pipe embedded in a pendulum plow chest, comprising the following steps: S1, adjusting the moisture content of the soil; S2, testing the limit heat power P of the heat pipe max ; S3, test the temperature of the evaporation section and the condensation section under the optimum heat transfer power of the heat pipe; S4, measure and calculate the cross-sectional area A of the heat pipe; S5, according to the formula K eff =μ·λ·P in ·L / [(T h -T c )·A] Calculate the equivalent convective heat transfer coefficient K of the heat pipe in Xinjiang soil eff . The invention utilizes the Jianghuai soil and constructs the Xinjiang soil, aiming to provide a method for determining the equivalent heat transfer coefficient of a plow breast embedded with heat pipes under the soil cultivation conditions in Xinjiang.

Description

technical field [0001] The invention relates to the technical field of agricultural tillage machinery, in particular to a method for determining the equivalent heat transfer coefficient of a heat pipe embedded in a pendulum plow chest. Background technique [0002] The plow chest is an important tillage part of the pendulum plow body, and the shin blade area is the most critical working part of the plow chest. When the pendulum plow is working in the field, the main function of the shin blade is to continue to break and turn the soil moved by the plowshare. At this time, the soil is deformed and broken due to the damage of the original bonding force; The repeated disturbance and chiseling of sand and gravel induces damage to the plow: the formation of plastic deformation impact pits, cold hardening of micro-zones, and peeling of abrasive debris, which have a great impact on the cutting life and performance of the plow body. The researchers selected the sandy clay soil in Xi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D15/02G06F30/20
CPCF28D15/02G06F30/20G06F2119/08
Inventor 朱林张佳雯吴庆明陈朴董思佳
Owner ANHUI AGRICULTURAL UNIVERSITY