Modern lifestyle, industrialization and economy thrive on energy which is getting expensive overtime. Thermosyphon based systems are getting attraction for their promising heat transfer efficiency and zero energy utilization. Refrigerants having ozone depletion potential (ODP) and high Global Warming Potential (GWP) have been banned or under time bared permission under Montreal (1987) and Kyoto...

Evacuated tube solar water heaters are gaining more attention in the present market scenario as compared to conventional collectors. Such collectors versatile because no tracking is required and operating temperature range also broad. Comparatively, it cost-effective may attain higher thermal efficiency. However, like other collectors, continuous energy supply sometimes hampered by intermittent...

a mixed solar dryer with a specific mechanism to vary the tilted angle of collector, is utilized to fulfill all tests. the efficiency of the dryers is low because of various reasons such as heat loss of air in an open flow circuit. getting air back toward the air inlet of dryer can increase the efficiency of dryer and decrease drying process period. a new mechanism considered for dryer which co...

The hybrid nanofluid is formed when more than one type of nanoparticle used in the preparation process. study nanofluids most recent trend, as they have potential to improve greener energy production. Solar thermal systems still require further research before can be widely used. As a result, current uses mono CuO and + Cu/water working fluid explore performance an evacuated tube solar collecto...

Solar thermal collectors, such as flat plate and evacuated tube are used for maximum of 60–80 °C temperature parabolic trough collectors 700–900 ranges. It is needed to develop analyze solar compound (CPC) which can operate in an intermediate range from 50–300 industrial domestic applications. However, optical performance CPC strongly influenced by concentration ratio. The current study present...

We report results of frequency stability measurements of an extended cavity diode laser (ECDL) whose frequency is stabilized by a non-evacuated scanning transfer cavity. The transfer cavity is locked to a commercial frequency stabilized helium-neon laser. Frequency stability is measured by use of an optical frequency comb. The environmental perturbations (variations of temperature, air pressure...