High-quality micro-lasers are key ingredients in non-linear optics, communication, sensing and low-threshold solar-pumped lasers. However, such micro-lasers exhibit negligible absorption of free-space broadband pump light. Recently, this limitation was lifted by cascade energy transfer, in which the absorption and quality factor are modulated with wavelength, enabling non-resonant pumping of hi...

the use of solar collectors in combination with heat pipes is rapidly growing in recent years.heat pipes, as heat transfer components, have undeniable advantages in comparison with other alternatives. the most important advantage is their high rate of heat transfer at minor temperature differences. although there have been numerous studies on the heat analysis or first thermodynamic analysis of...

Currently, the performances of thin film solar cells are limited by poor light absorption and carrier collection. In this research, large, broadband, and polarization-insensitive light absorption enhancement was realized via integrating with unique metallic nanogratings. Through simulation, three possible mechanisms were identified to be responsible for such an enormous enhancement. A test for ...

A major problem of current silicon thin film solar cells lies in low carrier collection efficiency due to short carrier diffusion length. Instead of improving the collection efficiency in a relatively thick solar cell, increasing light absorption while still keeping the active layer thin is an alternative solution. Absorption enhancement in a thin film Si solar cell by incorporating a two-dimen...

The exploitation of nanofluids is the most noteworthy way to make better rate heat transfer in solar collectors. Moreover, recently utilizing thermoelectric generators are widely studied direct conversion into electricity. objective present study deal with a novel multigeneration system that includes nanofluid-based parabolic trough collector integrated quadruple effect absorption refrigeration...

HVAC systems account for at least 40% of the energy consumption general office buildings. Therefore, reducing use is indispensable. used in public buildings mostly adopt a central air conditioning system. To save system, high-efficiency heat source machines have been adopted, and inverter control pumps has generally introduced. As further measure to energy, an optimal proposed. Model-based main...

Due to finding solutions reduce energy consumption and improve the electricity production efficiency in power cycles, using waste heat of cycles combined generation systems can be a useful approach. Also, by wasted cooling heating demands met. Therefore, this study presents energy, exergy, economic, environmental evaluations new configuration cooling, heating, (CCHP) or tri-generation system wi...