This paper aims to investigate the development of a floating artificial sustainable energy island at a conceptual design level that would enhance the energy independence of islands focusing on a case study on the island of Crete. This paper provides a baseline assessment showing the immense potential of wind and solar energy in and around Crete integrating the third significant renewable energy source (RES) of ocean waves into the energy island. The selection of the best location for the floating offshore platforms that compose the energy island is addressed through exploiting the great potential of the above-mentioned RES, taking into consideration criteria with regard to several significant human activities. To this end, the concept of an innovative floating modular energy island (FMEI) that integrates different renewable energy resources is proposed; in addition, a case study that focuses on the energy independency of a big island illustrates the concept referring to the substitution of the local thermal power plants that are currently in operation in Crete with sustainable energy power. Although focused on the renewable energy resources around Crete, the work of this paper provides a basis for a systematic offshore renewable energy assessment as it proposes a new methodology that could be used anywhere around the globe.

The main reason for applying microclimate control in greenhouses is to achieve optimal growing environment. Because of its complexity, excessive control in greenhouses can adversely affect the growing crops. Moreover, we need an optimal ambiental control to accomplish these complicated objectives, including low emissions and reduced production costs. This paper describes one practical approach to the real-time control system in a greenhouse. Control system considers internal and external ambient factors related to the regulation process. Control system cyclically reads the data from the sensors and implements appropriate response on the actuator, based on required greenhouse conditions. Most challenging was the design of the control algorithm for this kind of process, due to a complexity of influential greenhouse variables.

The environmental benefits of green roofs have been widely recognized. In recent years, increasing attention has been paid to moisture management in the green roof systems. The moisture in the green roof has an influence on its thermal and hydrological performances. An accurate measurement of water content in green roof substrate is important for irrigation monitoring, optimal irrigation management, and plant growth. Knowing the performance and characteristics of the sensor for the chosen substrate layer in a green roof system is essential. This paper presents laboratory calibration of the capacitive moisture sensor in two types of the green roof substrate layer. The volumetric water content of several mineral wool and soil samples, with the water content from low until saturated, were measured using the gravimetric method and related to frequency obtained by the sensor. The results have shown that the capacitive moisture sensor has a good response to water content variation.

External Thermal Insulation Composite Systems (ETICS) are widely utilized to increase the energy efficiency of buildings by minimizing heat loss through exterior walls. However, when improperly installed, thermal bridges are formed, significantly decreasing the overall thermal performance of the façade system. This study aims to identify installation defects in ETICS facades by characterizing thermal bridges and their impact on energy performance. The selection of infrared thermography as the primary technique for detecting thermal bridges was based on its ability to reveal surface temperature variations quickly. In-situ thermographic examinations were performed on a case study edifice to discern prevalent installation deficiencies. This inquiry offers a methodical framework for identifying and scrutinizing ETICS installation shortcomings through thermographic imaging, thereby providing valuable insights for enhancing insulation methodologies. The investigation disclosed that thermal bridges predominantly manifested at the junctures of walls and floors, around window apertures, and at points of external element attachment, culminating in increased thermal losses, condensation issues, and risks of mold proliferation. The evaluation of the recognized deficiencies underscored a pressing necessity for elevating installation quality control measures and rigorous compliance with established protocols. The research outcomes underscore a fundamental imperative for amalgamating inspection strategies with preventive measures to bolster the energy efficiency and longevity of ETICS facades. Prospective research endeavors should concentrate on the advancement of detection methodologies.