A polymer solar collector is developed and its behavior is investigated both experimentally and with computational fluid dynamics (CFD). Solar irradiation as well as convection and heat transfer in the circulating fluid and between the parts of the collector is considered in the model. The...

The use of different materials for the same solar system component (collector, water tank, etc.) affects both the efficiency and the amount of conventional energy substituted by the system and hence the overall environmental impact of a Domestic Solar Hot Water System (DSHWS). The net...

A methodology for the environmental impact evaluation over the life span of a Domestic Solar Hot Water System (DSHWS) is presented. The results are compared to the environmental consequences of the conventional energy form substituted and the total environmental gain is calculated. For the...

The effort to reduce the dependence on imported crude oil in Greece, after the oil crises in the '70s, has resulted, among others, in a total installed area of 3.57millionm2 solar collectors in 2007, making Greece one of the pioneers in the use of domestic solar hot water system (DSHWS) worldwide.

Ambient temperature bin data are used for estimating the energy consumption for heating and cooling of buildings. This well-known method is a steady-state approach and the energy requirements are determined at various outdoor temperatures, in order to account for the effect of outside...

This article presents the implemented policies of the European Union in the broader field of energy and provides a picture of the Union′s strategy on energy related issues. A brief historical background is provided, covering the period from the beginning of the Union′s creation in 1951, when...

The present study provides insights into how the national legislation affected the development of connected to the grid Photovoltaic (PV) systems in Greece from January 2007 to June 2012. It analyses the evolution of PV systems installed capacity in Greece, compared to the targets set, as well...

In this paper, the options of using Renewable Energy Sources (RES) in the power system of Cyprus are examined in order to reduce air pollutant emissions. Power generation is the major contributor to total emissions in Cyprus with a share of 36% in carbon dioxide (CO2), 62% in sulfur dioxide...

In this paper the relationship between ground temperature and ambient air temperature is investigated in Northern Greece. To this end, 10 years records of daily average values of ambient air, bare and grass-covered ground surface, and ground under bare surface temperatures at depths of 0.02,...