Solar air heaters (SAHs) are the most widely used and inexpensive solar energy systems. As absorbing plate collects radiation transfers heat to passing air, many effective experimental analytical studies have been conducted on SAH roughness by a number of researchers. The artificial elements that break down laminar sub-layer at surface absorber detailed in this work order optimize transfer abso...

Electric load profiles of tropical islands in developed countries are characterised by morning, midday and evening peaks arising from all year round high power demand in the commercial and residential sectors, due mostly to air conditioning appliances and bad thermal conception of the building. The work presented in this paper has led to the conception of a global quality standards obtained thr...

In recent years, the growing global interest in the conservation of environment has provided a fresh impetus for research in the area of solar energy utilization. Already, installation of solar energy extraction devices such as solar panels, solar water heaters, solar cookers etc. is becoming popular in urban buildings. Most of these devices consist of a solar receptor that is kept facing the s...

In this paper, a mathematical model is formulated to quantify the social impact an individual has on his/her community when he/she performs any energy efficiency project and transmits that information to his/her neighbours. This model is called the expected power savings model; it combines direct and indirect expected power savings of the energy efficiency project for each individual within the...

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...

Packed bed is generally recommended for attaching with solar air heater in order to store thermal energy of hot air. For designing such a system under the given system and operating parameters, it is required to predict performance of the system by using mathematical models. In the present paper an attempt has been made to discuss mathematical models reported in the literature for predicting th...

The lack of readily available sterilization processes for medicine and dentistry practices in the developing world is a major risk factor for the propagation of disease. Modern medical facilities in the developed world often use autoclave systems to sterilize medical instruments and equipment and process waste that could contain harmful contagions. Here, we show the use of broadband light-absor...

Background Claretian Associates, a non-profit community development organization, and South Chicago Workforce, a non-profit builder and contractor, have teamed to create 26 efficient, healthy, sustainable, affordable homes in South Chicago, IL. These homes are constructed with structural insulated panels (SIPs), are heated with condensing furnaces, utilize sealedcombustion water heaters, and co...