6 research outputs found
Techno-economic assessment of solar technologies to meet hospitals energy needs
Hospitals present one of the highest energy consumptions per surface unit, meaning that on-site renewable energy generation and energy efficiency improvements are key to lower hospitals energy demand, external energy dependence and greenhouse gases (GHG)emissions. In this work, the feasibility from the techno-economical point of view of the installation of three solar-based energy generating technologies in hospitals in different climate locations in Europe is addressed. The potential of solar energy technologies to cover the energy needs of the hospitals under study is conducted proposing a novel design and sizing optimization methodology for on-roof installations. The profitability of the different solar-based installations will vary depending on the solar technology output (electrical, thermal or both) and on the type of energy needs of the hospital; but in all cases, profitability is mostly influenced by the price of the current energy source supplying the hospital energy needs. Levelized cost of energy (LCOE)values for on-roof photovoltaic (PV), solar thermal (ST),and photovoltaic-thermal (PV-T) installations obtained are in the range of 0.028-0.056, 0.051-0.096, and 0.053-0.128 €/kWh, respectively; for locations in latitudes from 37 N (Seville) to 60N (Oslo) in Europe. Results from this work aim to serve as reference for similar studies in a wide range of climatesAlba Ramos acknowledges the Universitat Politècnica de Catalunya for her Serra Hunter Professor postPostprint (published version
Estudi de l'evoluciĂł dels avions i dels seus perfils alars
En aquest treball es tracta, en primer lloc, la història de l’aerodinĂ mica, els principals descobriments i avanços cientĂfics al respecte i l’evoluciĂł de la manera que ha tingut l’home d’afrontar el problema d’entendre els conceptes de l’aerod inĂ mica i en Ăşltima instĂ ncia d’aconseguir volar. AixĂ mateix, s’estudiarĂ la mecĂ nica del vol dels avions, les lleis de la fĂsica que governen el seu comportament aixĂ com aquells sistemes d’equacions que permeten calcular el seu moviment i deduir la seva trajectòria en unes circumstĂ ncies donades. TambĂ© s’introduiran alguns conceptes bĂ sics de l’aerodinĂ mica que seran essencials per a una millor comprensiĂł dels altres apartats del treball, aixĂ com per comprendre el funcionament de les diferents parts de l’aviĂł, aixĂ com les raons del seu Ăşs. Posteriorment, s’estudiaran les caracterĂstiques dels avions, centrant - se en les parts que influeixen mĂ©s a l’hora d’ aconseguir que l’aviĂł pugui volar, i els dispositius que milloren les caracterĂstiques aerodinĂ mique s de l’aviĂł. Finalment, es durĂ a terme una anĂ lisi fluidodinĂ mica per tal de comprendre millor el comportament dels perfils alars i la seva evoluciĂł al llarg de la història, aixĂ com per posar en prĂ ctica els coneixements teòrics adquirits durant la reali tzaciĂł del treball i tractats als anteriors apartats d’aques
Analysis of the potential of solar-based energy technologies to meet the energy demand of a hospital
The objective of this thesis is to design a renewable energy system which supplies electrical and/or thermal energy to Hospital de Sant Pau, in Barcelona. This system is based in solar power harnessing technologies. With this purpose, the available technologies in the market are studied and the available data is analyzed: temperature, solar irradiation, weather and the hospital’s energy demand. Knowing these data, three installation alternatives are proposed, based on photovoltaic, thermal or hybrid solar panels, respectively. For each option, the number and distribution of panels is calculated and their energy output throughout the year is determined by using the aforementioned weather data. Since this information is available for every hour of a year, the calculations can be carried out with high detail. The energy output is optimized by adjusting the orientation of the panels and the separation between rows of panels. These energy outputs, emissions savings, costs, payback times and economic revenue of these alternatives have been studied in order to choose the most suitable system amongst them. The three alternatives have proven similar rentability and emissions savings per euro invested and have proven to be viable options. However, the solar thermal option has been chosen due to its slight advantages in economic terms in front of the hybrid option whilst providing an almost equal amount of energy (and thus, of emissions savings). Finally, a Life Cycle Assessment has been carried out for the chosen system. In conclusion, any of the studied solar-based renewable energy production systems is an economically viable option for the hospital, even if they can only cover a small percentage of the building’s vast energy demand. Environmentally speaking, it can be assured that at least the solar thermal project, which has been analyzed more deeply, is also viable, implying an important reduction of greenhouse gases emissions
Estudi de l'evoluciĂł dels avions i dels seus perfils alars
En aquest treball es tracta, en primer lloc, la història de l’aerodinĂ mica, els principals descobriments i avanços cientĂfics al respecte i l’evoluciĂł de la manera que ha tingut l’home d’afrontar el problema d’entendre els conceptes de l’aerod inĂ mica i en Ăşltima instĂ ncia d’aconseguir volar. AixĂ mateix, s’estudiarĂ la mecĂ nica del vol dels avions, les lleis de la fĂsica que governen el seu comportament aixĂ com aquells sistemes d’equacions que permeten calcular el seu moviment i deduir la seva trajectòria en unes circumstĂ ncies donades. TambĂ© s’introduiran alguns conceptes bĂ sics de l’aerodinĂ mica que seran essencials per a una millor comprensiĂł dels altres apartats del treball, aixĂ com per comprendre el funcionament de les diferents parts de l’aviĂł, aixĂ com les raons del seu Ăşs. Posteriorment, s’estudiaran les caracterĂstiques dels avions, centrant - se en les parts que influeixen mĂ©s a l’hora d’ aconseguir que l’aviĂł pugui volar, i els dispositius que milloren les caracterĂstiques aerodinĂ mique s de l’aviĂł. Finalment, es durĂ a terme una anĂ lisi fluidodinĂ mica per tal de comprendre millor el comportament dels perfils alars i la seva evoluciĂł al llarg de la història, aixĂ com per posar en prĂ ctica els coneixements teòrics adquirits durant la reali tzaciĂł del treball i tractats als anteriors apartats d’aques
Estudi de l'evoluciĂł dels avions i dels seus perfils alars
En aquest treball es tracta, en primer lloc, la història de l’aerodinĂ mica, els principals descobriments i avanços cientĂfics al respecte i l’evoluciĂł de la manera que ha tingut l’home d’afrontar el problema d’entendre els conceptes de l’aerod inĂ mica i en Ăşltima instĂ ncia d’aconseguir volar. AixĂ mateix, s’estudiarĂ la mecĂ nica del vol dels avions, les lleis de la fĂsica que governen el seu comportament aixĂ com aquells sistemes d’equacions que permeten calcular el seu moviment i deduir la seva trajectòria en unes circumstĂ ncies donades. TambĂ© s’introduiran alguns conceptes bĂ sics de l’aerodinĂ mica que seran essencials per a una millor comprensiĂł dels altres apartats del treball, aixĂ com per comprendre el funcionament de les diferents parts de l’aviĂł, aixĂ com les raons del seu Ăşs. Posteriorment, s’estudiaran les caracterĂstiques dels avions, centrant - se en les parts que influeixen mĂ©s a l’hora d’ aconseguir que l’aviĂł pugui volar, i els dispositius que milloren les caracterĂstiques aerodinĂ mique s de l’aviĂł. Finalment, es durĂ a terme una anĂ lisi fluidodinĂ mica per tal de comprendre millor el comportament dels perfils alars i la seva evoluciĂł al llarg de la història, aixĂ com per posar en prĂ ctica els coneixements teòrics adquirits durant la reali tzaciĂł del treball i tractats als anteriors apartats d’aques
Solar-based energy technologies potential to meet a hospital energy needs
This article analyses the potential of solar-based energy technologies to cover the electrical and thermal energy needs of a hospital. In particular, this work focusses on the case study of the Hospital de Sant Pau, in Barcelona, and it is based on previous work developed in the context of a research master’s project at the UPC. Modular solar-based technologies available in the market are studied, as well as the weather conditions of the location and the hospital’s energy demand. Three different solarbased technologies are identified as feasible to cover a percentage of the hospital energy needs: photovoltaic, thermal and hybrid solar panels. The potential of each one of the aforementioned technologies is studied separately; the number and distribution of each type of panels is calculated and their energy output throughout the year is calculated, by adjusting the orientation of the panels and the separation between the different rows. Once the yearly energy output for each technology is obtained, cost estimations and GHG emission savings calculations are conducted. The three alternatives prove to be economically viable and environmentally sustainable options for the case of study analysed, even if they can only cover a small percentage of the building’s vast energy deman