Possibility of Using Fuel Cells and Hybrid Energy Systems for Energy Generation in Venizelio Hospital in Crete, Greece | Chapter 6 | Geography, Earth Science and Environment: Research Highlights Vol. 7

Hospitals operate continuously all over the year and their specific energy consumption is high compared with other types of buildings. They mainly use fossil fuels and grid electricity while the use of renewable energy sources is limited so far. The possibility of using a) fuel cell and b) a hybrid energy system consisting of a fuel cell and solar photovoltaic modules to meet the heat and power demand in Venizelio Hospital located in Crete, Greece has been studied. The energy consumption in several sectors in Venizelio Hospital has been used in estimations. Our results indicated that a fuel cell with a capacity of 1,397 KW can meet the heat and power demand in the hospital producing excess heat at 2,451 MWh_th per year. In the case of the hybrid energy system, a fuel cell with a capacity of 697.5 KW and a solar photovoltaic system with a nominal capacity of 1,629 KW_p can meet the heat and power demand in the hospital. The total installation cost of the hybrid energy system, at 3,726,500 €, was lower than the installation cost of the fuel cell at 4,191,000 €. Our work indicates that the use of sustainable energy systems can replace the use of fossil fuels in hospitals reducing their carbon emissions and increasing their energy resilience. The results could be useful to policymakers, hospitals’ authorities and energy companies which design and install sustainable energy systems.

 

Author (s) Details

 

John Vourdoubas
Hellenic Mediterranean University, Crete, Greece.

 

Please see the book here:- https://doi.org/10.9734/bpi/geserh/v7/4650

Estimation of the Required Bio-Fuels Substituting Petroleum-Based Fuels in Road-Transportation in the Island of Crete, Greece and Their Climate Change Impacts | Chapter 4 | Contemporary Perspective on Science, Technology and Research Vol. 4

Climate change consists of the most important global environmental problem in our era and its mitigation requires the elimination of the fossil fuels use in all sectors. Transportation consumes large amounts of fossil fuels and has a high share in carbon emissions. According to the current EU policies the conventional vehicles using petrol-based fuels should substitute by 2030 at least 14% of their fuels with bio-fuels including bio-ethanol and bio-diesel. The vehicles in the island of Crete, Greece currently use conventional fuels. The present study investigates the feasibility of substituting 14% of their petrol-based fuels with bio-fuels that could be produced locally. The consumption of gasoline and diesel oil during 2021 in Crete was estimated at 309,766 tons while their carbon emissions at 1,005,182 tnCO2. The required bio-ethanol substituting 14% of the gasoline currently used is estimated at 33,475 tons/year while the bio-diesel substituting the diesel oil at 28,260 tons/year. The annual carbon emission savings due to substitution of conventional fuels with bio-fuels are calculated in the range of 57,207 tnCO2 to 68,105 tnCO2. The land required for the cultivation of the crops producing the abovementioned quantities of bio-fuels corresponds at 4.33% of the total island’s area. The cultivation of energy crops in Crete for bio-fuels production is not foreseen in the future and the required bio-fuels to meet the EU quota should be imported from other territories. It is foreseen that the future de-carbonization in vehicles’ transportation in Crete should be achieved with the electrification of the transportation sector using green electricity generated locally by the abundant solar and wind energy resources.

Author(s) Details:

John Vourdoubas,
107B El. Venizelou Str., 73132, Chania, Crete, Greece.

Please see the link here: https://stm.bookpi.org/CPSTR-V4/article/view/13137

Solar Electricity Generation from Floating Photovoltaics Installed in Water Dams: A Case Study from the Island of Crete, Greece | Chapter 5 | Research Highlights in Science and Technology Vol. 5

 This affiliate investigate the likelihood of installing floating photovoltaics in the existent water reservoirs in the island of Crete, Greece. Solar energy is very main for heat and power generation in the current generation of climate change and the worldwide efforts for allure mitigation. Deployment of solar photovoltaics for power generation evolves rapidly completely countries. Installation of floating cosmic photovoltaics in water bodies resides of a new and promising technology. Floating cosmic photovoltaics can be equipped in existing hydro-energetic plants transforming them to composite energy schemes generating two together hydro and solar electricity. Data on existent water dams in Crete were used and the theoretical power of floating photovoltaics in addition to their potential for electricity creation were evaluated. It has existed estimated that the nominal capacity of floating photovoltaics that maybe installed in these water dams, accompanying coverage ratio at 0.1 to 0.3, changes between 55.76 MWp to 167.3 MWp while the annual power generation from the floating photovoltaics changes between 78.3 GWh to 234.9 GWh. The results are main since they signify that deployment of FPVs as an alternative electronics to terrestrial PVs now used in Crete has many benefits combining cosmic electricity creation with water funds and less use of valuable land. The annual electricity generation from the abovementioned buoyant panels corresponds at 2.57% to 7.72% of the annual power consumption in Crete in 2018. According to our research, it is attainable to put floating cosmic photovoltaics in Crete's existing water dams, bearing large amounts of green electricity accompanying a variety of supplementary environmental benefits. Policymakers, local and territorial authorities, energy firms, and proprietor of the island's water dams manage all benefit from the current study.

Author(s) Details:

John Vourdoubas,
107B El. Venizelou str., 73132, Chania, Crete, Greece.

Please see the link here: https://stm.bookpi.org/RHST-V5/article/view/11144

Feasibility of De-carbonization of Air-transportation to and from the Island of Crete, Greece | Chapter 3 | Current Advances in Geography, Environment and Earth Science Vol. 1

 Clean energy transition is a critical and pressing issue in European islands that are contributing to the global effort to mitigate climate change. The Greek island of Crete is a famous tourist destination, with the majority of visitors arriving and departing by plane. The tourism industry dominates the Cretan economy, accounting for over half of all regional revenue. The current study's goal is to look at the possibilities of decarbonizing air travel to and from Crete. While other studies have predicted greater levels, air transportation accounts for 10.62 percent of total carbon emissions on the island. This is more than the expected share of carbon emissions from aviation, which accounts for 2-3 percent of global carbon emissions. Improvements in aircraft standards, usage of sustainable aviation fuels, offsetting carbon emissions, and adopting new rules limiting frequent use of air travel are all discussed as technological and non-technology means to decarbonizing aviation. The practicality and consequences of various strategies are discussed, implying that decarbonization will be difficult in the short and medium term. It seems unlikely that sustainable aviation fuels, such as biofuels and electrofuels, will be produced in sufficient quantities and at competitive rates anytime soon. New rules that raise the cost of flying and promote alternative, sustainable modes of transportation will have negative consequences for the island's tourism economy. On the other hand, decarbonization in other socio-economic sectors in Crete, such as power generation, heat and cooling production, and intra-island transportation, is easier than in air transportation.

Author(S) Details

John Vourdoubas
Consultant Engineer, 107B, El. Venizelou str., 73132, Chania, Crete, Greece.

View Book:- https://stm.bookpi.org/CAGEES-V1/article/view/5184