Intermittent renewable energy sources (RES) are increasingly used in many energy systems. The higher capacity of intermittent RES increases the importance of introducing flexible generation units into the electricity system balancing. Distributed district heating plants with combined heat and...

An experimental research with a solar photovoltaic thermal (PVT) micro grid feeding a reversible air–water, 6kW heating capacity heat pump, has been carried out from December 2012 to April 2013. Its purpose is to heat a laboratory that is used as a house prototype for the study of...

The study employs three-dimensional computer modeling for visualizing the solar access and shading in the traditional housing cluster of Sana'a historical city. It investigates the geometrical relationships among the building form and the sun location, and motion, in the critical times of the...

A new type of residence with solar heating, earth cooling and air circulation(the SEA House) has been proposed by the authors. In winter, the house is heated by solar energy. Thermal insulation, heat storage and air circulation are used to maintain the room temperature at a comfortable level and...

The thermal performance of a passively heated zone is predicted by calculating the transient temperature variation of each node in the system using a finite-difference model. The sensitivity of the zone air temperature to the change in some of the zone features is examined. Some of these...

This article analyses the energy statistics of 15 European Union countries (EU-15), giving special emphasis to the installed solar photovoltaic and thermal collector capacity. The installed capacities per capita are analysed in relation to the solar radiation income of respective countries with...

Integrated solar absorption cooling and heating (SACH) systems, which use solar energy to provide space heating, space cooling, and water heating, represent a promising substitute to reduce the earth's carbon emissions. SACH systems currently are designed based on engineering experience for the...

Most solar thermal hot water heating systems utilize a pump for circulation of the working fluid. An elegant approach to powering the pump is via solar energy. A “solar pump” employs a photovoltaic module, electric motor, and pump to collect and convert solar energy to circulate the working...

Soil temperature under plastic cover is a function of incoming radiation and thermal characteristics of the mulching material and the soil. A field experiment was conducted at Fudhiliyah Agrometeorological research station to investigate how soil temperature is influenced by different soil...

This paper presents a performance analysis of four types of air heating flat plate solar collectors: a finned collector with an angle of 75°, a finned collector with an angle of 70°, a collector with tubes, and a base collector. In this study, the first and second laws of efficiencies were...