Simulation evaluation and optimization design method for integrated convex pressure-stabilizing and flow-distributing automobile condenser

Abstract

The invention discloses a simulation evaluation and optimization design method for an integrated convex pressure stabilizing and flow distributing automobile condenser, which comprises the following steps of: controlling the depth of a radiating flat pipe inserted into a first flow collecting pipe, wherein the insertion depth of the radiating flat pipe in the first flow collecting pipe is changedin a convex curve manner, the decline amount of the insertion depth of the heat dissipation flat pipe is in exponential function distribution of a natural constant e, and a plurality of groups of different convex curves are designed; establishing a condenser drainage basin simulation model in which the insertion depths of a plurality of groups of N heat dissipation flat pipes are distributed according to different convex curves, carrying out grid division on the simulation drainage basin, setting a fluid medium as gaseous water, controlling the flow velocity of a drainage basin inlet section flow field according to requirements, and carrying out CFD simulation to obtain flow field flow velocity distribution data of all parts of the condenser drainage basin; collecting the flow field flow velocity of the outlet of the heat dissipation flat pipe to obtain the flow field flow velocity distribution standard deviation of the whole outlet of all heat dissipation flat pipes of the condenser;comparing the flow field flow velocity distribution standard deviations at the outlets of the heat dissipation flat pipes of all simulation models, and selecting a design scheme with the minimum flowvelocity distribution standard deviation.

Description

technical field [0001] The invention relates to the technical field of automobile condensers, in particular to a simulation evaluation and optimal design method for an integrated convex-type stabilized voltage distribution automobile condenser. Background technique [0002] Automobile condenser is an important part of automobile air conditioning system, mainly used to condense high temperature and high pressure refrigerant. After the refrigerant enters the first header of the condenser, the flow field velocity at the inlet of the heat dissipation flat tube near the air intake hole is relatively high, and more gaseous refrigerant passes through, while the high temperature gaseous refrigerant passing through the heat dissipation flat tube far away from the air intake hole Less, resulting in inconsistent work of the heat dissipation flat tubes of the entire condenser, and the loss of the heat dissipation flat tubes near the air intake hole is relatively serious, and the car con...

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Problems solved by technology

[0003] At present, the structural form of domestic automobile condensers is mainly a parallel flow heat dissipation structure. The insertion depth of the flat tubes is consistent. The amount of solvent is less, resulting in inconsistent working degree of heat dissipation flat tubes in the parts of the automobile condenser, and the working efficiency of the condenser cannot be maximized

[0004] CN202304131U provides a compact parallel-flow condenser with high heat transfer performance. Under the same windward area, the heat transfer performance is improved by more than 40% compared with the existing condenser, but no substantial changes have been made from the essential structure of the condenser. Performance improvement, for condensers without windward area limitation, the improvement effect is not obvious; for example, CN110285608A provides an external condenser for a new energy vehicle heat pump system, which improves the working efficiency of the condenser by changing the flow of condensate, However, there are still inconsistencies in the velocity of the flow field in the local cooling pipes, and the phenomenon of uneven usage of the cooling pipes

This invention changes the way of the traditional condenser from top to bottom to top to bottom, and replaces it with a drainage tube to make the distribution of the refrigerant flow more even. However, there are still inconsistent flow velocities in the local heat dissipation pipes and uneven use of heat dissipation pipes. Phenomenon

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