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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Related Experiment Video

Updated: Jun 16, 2026

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Absorber for solar power.

|February 6, 2010

Summary

This summary is machine-generated.

This study introduces a new, economical solar absorber with low reradiation losses. It achieves high thermal and conversion efficiencies, making it suitable for terrestrial and space applications.

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Area of Science:

Thermodynamics
Solar Energy Conversion
Materials Science

Background:

Traditional solar absorbers often suffer from significant reradiation losses, limiting their efficiency.
Developing cost-effective absorbers is crucial for widespread solar energy adoption.

Purpose of the Study:

To describe a novel, economical solar absorber design.
To analyze the performance and efficiency of this new absorber technology.

Main Methods:

The study details a new operating principle for a solar absorber.
Performance analysis was conducted for terrestrial and space-based applications.

Main Results:

The absorber demonstrates very low reradiation losses.
Achieved approximately 90% thermal efficiency and 73% conversion efficiency for terrestrial use.
Higher conversion efficiencies are possible in space applications below 300 K.

Conclusions:

The developed solar absorber is both simple and economical.
Its high efficiency and compatibility with low-cost concentrators make it viable for diverse applications.
Space-based applications offer potential for even greater conversion efficiency.