Emulsion Spectrum Fluid Filter for Solar Panel Heat Reduction
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Solution Overview
Problem
Current solar panels, particularly those using single crystal silicon solar cells, do not effectively utilize the entire wavelength of sunlight, leading to increased temperature and reduced photovoltaic efficiency.
Innovation Solution
An emulsion spectrum fluid filter is developed, comprising a transparent channel with an emulsion of oil and surfactant that absorbs light wavelengths outside the effective range for photoelectric effect, thereby controlling light wavelength absorption and maintaining thermal conductivity similar to water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single crystal silicon solar cell is used, then the solar cell can produce electricity using wavelengths of 730 nm to 1130 nm, but the remaining wavelengths are not utilized and cause temperature increase, reducing photovoltaic efficiency
Solution Approach 1:
The solar spectrum is segmented into effective wavelengths (730-1130 nm) and non-effective wavelengths. The emulsion filter selectively absorbs the non-effective wavelengths while allowing effective wavelengths to pass through to the solar cell, thereby segmenting the spectral utilization and preventing heat generation from unused wavelengths.
Solution Approach 2:
An emulsion filter composed of oil and surfactant is introduced as an intermediary substance between the sunlight and the solar cell. This intermediary selectively absorbs harmful non-effective wavelengths and transmits effective wavelengths, mediating the interaction between sunlight and the solar cell to improve efficiency and reduce temperature.
2Illumination intensity
If oil is added to the emulsion to absorb short wavelength light, then light absorption control is improved, but thermal conductivity may differ significantly from water
Solution Approach 1:
The concentration of oil in the emulsion is precisely controlled at low levels (0.01-5 wt%) to achieve the desired light absorption characteristics while maintaining thermal conductivity close to that of water. This parameter optimization resolves the contradiction between light absorption effectiveness and thermal conductivity stability.
Solution Approach 2:
The emulsion is formulated as a composite material consisting of oil, surfactant, and water. The surfactant acts as an emulsifier to create a stable dispersion of oil droplets in water, combining the light absorption properties of oil with the high thermal conductivity of water, thus achieving both effective wavelength filtering and maintained thermal performance.
3Productivity
If emulsion is used as a cooling fluid, then non-effective light wavelengths can be absorbed, but chemical stability and precipitation risk must be managed
Solution Approach 1:
The harmful non-effective wavelengths are extracted or removed from the spectrum that reaches the solar cell through selective absorption by the emulsion. This extraction of harmful radiation allows the emulsion to protect the solar cell while maintaining chemical stability through proper formulation.
Solution Approach 2:
The surfactant acts as an intermediary substance that stabilizes the emulsion by reducing surface tension between oil and water phases. This intermediary prevents precipitation and maintains chemical stability, allowing the emulsion to function reliably as a cooling and filtering fluid over extended periods.
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
The emulsion spectrum fluid filter effectively absorbs non-effective light wavelengths, reducing solar panel temperature and maintaining efficiency, while being chemically stable and free from significant thermal conductivity differences.
Implementation Method 1
an emulsion which effectively absorbs light of a short wavelength range and water which effectively absorbs light of a long wavelength range
Implementation Method 2
Solar power generation produces electricity through semiconductors when a light source is supplied thereto using a photoelectric effect
Implementation Method 3
the remaining wavelength except for 730 nm to 1130 nm is not involved in electricity production and plays a role in raising a temperature of an entirety of the solar panel
Data Source
AI summary
An emulsion spectrum fluid filter capable of controlling light wavelength absorption includes a transparent channel formed as a tube of a 90 degrees-rotated U shape, and an emulsion received in the transparent channel, wherein the emulsion may include dispersed oil and surfactant. Further, a method for preparing the emulsion is disclosed.