Transposition of the European Directive on the energy performance of buildings (EPBD) in Greece was enacted in 2008 by a national law. A follow-up regulation on the energy performance in the building sector—KENAK released in 2010, outlines the overall approach in accordance to European...

School buildings (238) in Hellas were audited for construction, heating, cooling, lighting, and mechanical and electrical systems. The annual average total energy consumption is 93 kWh/m2, of which approximately 72% is consumed for space heating. The assessment of various energy-conservation...

The use of buried pipes reduces the energy consumption for heating of agricultural greenhouses by increasing the air temperature and also improves indoor conditions by reducing temperature fluctuations during the day. A parametric analysis has been performed for a typical glass greenhouse to...

A new analytical expression for the broadband transmission function corresponding to atmospheric Rayleigh scattering has been developed. This expression is based on the latest known spectral data on Rayleigh scattering as well as on the Neckel and Labs model, incorporating the most recent...

A new analytical expression for the integral transmission function corresponding to the uniformly mixed atmospheric gases (CO2, CO, N2O, CH4 and O2) is proposed for use in solar radiation models. This expression is based on the latest spectral absorption data of the uniformly mixed gases, as...

This paper presents calculations of the social cost of electricity generation from fossil fuels in Greece. The interest of these calculations is that they allow a more realistic comparison between the actual price of electricity and the electricity produced by renewable energy sources, mainly...

Calculations of the spectral transmittance of the atmospheric aerosol, using Mie theory, for wavelengths between 0 and 40 μm is presented. The chemical composition of the aerosol particles has been modelled in order to correspond to the atmospheric conditions of medium and large coastal or near...

DNI (direct normal irradiance) can be calculated from global and diffuse horizontal irradiance measurements. However, the diffuse irradiance values need to be corrected because the pyranometer's shadowband does not obstruct only the solar disk but also a larger part of the sky vault. In this...