bubble columns are gas- liquid contactors that are widely used in chemical and bio- chemical industries. high mixing that result in high heat and mass transfer rates are amongst their advantages. heat transfer in a bubble column having a bundle of heaters investigated and the variation of heat transfer coefficient with variation in heaters pitch to diameter ratios in a bundle of heaters reporte...

System cost reductions and development of standardised plug-and-function systems are some of the most important goals for solar heating technology development. Retrofitting hot water boilers in single-family houses when installing solar collectors has the potential to significantly reduce both material and installation costs. In this study, the TRNSYS simulation models of the retrofitting solar...

In this paper double flow packed bed solar air heater has been investigated theoretically. The effect of air mass flow rate, porosity and different depth ratios at study state conditions on the thermal performance of a double flow packed bed solar air heater is found by using the alternative simulation system. Comparisons between the measured thermal and effective thermal efficiency of the doub...

Current solar to thermal energy conversion technologies, including concentrated solar power (CSP) and solar water heaters (SWH) utilize absorber surfaces that collect incident solar radiation. However, these absorber surfaces emit thermal energy (at their temperature) in the infrared (IR) spectrum, resulting in decreased overall efficiency for solar-to-thermal conversion. Selective absorber sur...

Energy consumption in India is massive, and even the quantity used for household tasks substantial. The majority of requirement satisfied by using fossil fuels, which are traditional methods. Heating water most frequent home application. Accordingly, this article examines studies from previous ten years. information demonstrates that renewable energy greatest way to cut back on both use fuels c...

This paper discusses the application of Fresnel Lens Concentrator for Solar Water Heater which is a case study in Indonesia. The purpose this was to find an empirical equation relationship between Direct Normal Irradiance (Ib) and focal point temperature (Tf). research location Latitude: 7.9553 °S Longitude: 112.6145°E. SM-206 solar power meteris used.The lenses are made PMMA material. Its spec...

The level of income the inhabitants in a township has an impact on potential to have adequate access electricity. bulk domestic energy sources needed residential buildings is derived from electrical energy. In South Africa, base load electricity coal thermal power plants. However, environmental associated with combustion plants cause for concern. This study was designed identify common mode san...

Due to the reduction of fossil resources, replacement renewable energy sources such as solar has become mandatory. Solar does not contain pollution and widely available in all parts world, especially warm regions. Our country (IRAN) is geographically located a hot dry region, with more than 280 sunny days per year, one nonpower applications heating space water consumption building using thermal...

Legionnaires’ disease is often acquired by inhalation of legionellae from a contaminated environmental source. In recent years, Singapore has seen an increase in the use of aerosol-generating fixtures such as mist fans and spa pools. Poorly maintained and designed water fixtures could pose a public health threat to the community. In this study, we provided an update on the prevalence of Legione...