Double flow channel open-type solar heat absorber having porous plate arrangement
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Solution Overview
Problem
The existing tower-type solar heat power generation systems experience heat loss due to inefficient heat transfer at the rear portion of the absorber, where the heat transfer medium re-exchanges heat through the wall surface, leading to reduced efficiency.
Innovation Solution
A dual-passage open-type solar heat absorber with a porous plate array is designed, featuring a three-layered tube structure with inner and outer passages, where the heat transfer medium is preheated in the outer passage and then introduced into the inner passage, minimizing heat loss through the side wall by increasing the heat-exchange surface area with porous plates and baffles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the heat transfer medium passes through a single passage in the absorber, then the structure is simple, but heat loss occurs through the rear portion wall surface due to insufficient heat transfer
Solution Approach 1:
The absorber passage is segmented into multiple passages (first passage and second passage) with different functions. The first passage handles preheating while the second passage handles main heating, allowing heat transfer medium to flow through separate paths and reducing heat loss through wall surfaces by optimizing thermal exposure in each zone.
Solution Approach 2:
The invention introduces a dual-passage configuration that adds spatial dimensionality to the heat transfer path. By creating parallel flow paths with different thermal characteristics, the system optimizes heat exchange efficiency without simply extending the single passage length, thereby reducing heat loss through a different structural approach.
2Productivity
If the contact area with collected sunlight is increased, then heat absorption efficiency is improved, but the device becomes harder to manufacture and install
Solution Approach 1:
The absorber employs a nested tube structure where inner tubes are positioned within outer tubes, creating multiple heat exchange surfaces. This nested configuration increases the effective heat absorption area without requiring a proportionally larger external footprint, making the device more compact and easier to manufacture while maintaining high heat absorption efficiency.
Solution Approach 2:
The absorber incorporates porous plates or porous wall structures that significantly increase the surface area available for heat absorption and heat transfer. These porous materials allow sunlight to penetrate and interact with a much larger internal surface area, enhancing heat absorption efficiency while maintaining a compact external structure that is easier to manufacture and install.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances heat-exchange efficiency by minimizing heat loss and increasing the contact area, allowing for effective absorption and transfer of solar heat, thereby improving the overall performance of the solar heat generation system.
Implementation Method 1
a plurality of porous plates and baffles are installed sequentially and repeatedly in the inner passage, so that the heat-exchange surface area and passage may extend thereby to increase the heat-exchange efficiency
Implementation Method 2
a receiver for absorbing the energy of the collected solar heat to transfer the energy to a heat transfer medium
Data Source
AI summary
The present invention relates to a dual-passage open-type solar heat absorber having a porous plate array, and more particularly, to a dual-passage open-type solar heat absorber which is formed in a form of a rectangular-shaped container in order to increase a contact area with collected sunlight and easily extend in a lateral direction or in a form of a circular-shaped container which is advantageous when a pressure is applied thereto, and which includes a main body formed in a formed of a rectangular or circular-shaped container by using a three-layered tube to form a dual passage therein so that heat is prevented from being lost through an outer wall.