This study aims to determine the necessity of applying a mirror coating on the side of a truncated solid dielectric CPC (compound parabolic concentrator) since ray tracing analysis has revealed that part of the incoming rays do not undergo total internal reflection, even within the half...

Evacuated tube solar water heater systems are widely used in China due to their high thermal efficiency, simple construction requirements, and low manufacturing costs. CPC evacuated tube solar water heaters with a geometrical concentration ratio <em>C</em> of less than one are rare. A comparison of the...

An innovative direct vapor generation (DVG) power system using cascade steam-organic Rankine cycle (SORC) and two-stage accumulators is proposed. It offers a significantly enlarged storage capacity due to a unique discharge operation mode. Synthetic oil Therminol® VP-1 is used as the heat...

Low-cost and eco-friendly auxiliary energy supply units to power gas sensors are of great significance to various fields. In this work, a gas sensor based on the PANI/NiCo 2 O 4 composite was powered by a gelatin-polyimide based triboelectric nanogenerator (GP-TENG) for the detection of NH 3 at...

We study the effect of secondary markets on equity-linked life insurance contracts with surrender guarantees. The policyholders are assumed to be boundedly rational in giving up their contracts, and a proportion of policyholders will access the secondary markets instead of surrendering the...