Search results for "ELECTRICITY"

Direct electricity production from Avgas UL91 fuel

2016

As fuel for fuel cells can be used various substances, but generally fuel cells are powered by hydrogen. However, problems with the storage of hydrogen are the reason for the search of new fuels for fuel cells. The paper presents the possibility of using Avgas fuel as fuel for fuel cell. The Avgas does not have the feature of electrical conductivity, for this reason a detergent (nonionic surfactant) was used for dissolving fuel in an electrolyte. The work shows possible electrooxidation of Avgas fuel emulsion prepared on the basis of a nonionic surfactant on a platinum electrode in an aqueous solution of H2SO4. As non-ionic surfactant was used the detergent Syntanol DS-10. The emulsion was …

Możliwość bezpośredniego zasilania ogniwa paliwowego biopaliwem

2017

Praca przedstawia analizę możliwości zasilania ogniw paliwowych biopaliwami. Analizy dokonano na podstawie rozpoznania pozycji literaturowych oraz badań własnych. Przeanalizowano wykorzystanie biogazu, wodoru pozyskanego metodami biologicznymi, wykorzystanie alkoholu metylowego oraz olejów roślinnych. Wykazano, że w przypadku metanolu istotnym jest poszukiwanie katalizatorów nie zawierających metali szlachetnych, natomiast w przypadku olejów roślinnych uzyskiwane wartości gęstości prądu nie pozwalają obecnie na zbudowanie ogniwa paliwowego o dużej wydajności. Wykazano, że jednak istnieje możliwość zasilania ogniw paliwowych biopaliwami, jednak konieczne są jednak, prace zmierzające do podwy…

Fuzzy logic controller and game theory based distributed energy resources allocation

2020

Energy management and demand control through conventional energy generation sources are challenging for energy providers. Distributed energy resources (DERs) allocation near load centers may provide a suitable solution. The main contribution of the paper improves the voltage profile and reduce the active and reactive power losses in the distribution network. DERs are integrated with IEEE 33 bus system using fuzzy logic controller (FLC) and game theory for two different cases with unity and 0.9 power factor (PF) and compares with conventional methods of integration (i.e., modified novel method, power loss sensitivity method, voltage sensitivity analysis method). The capacity of DERs is optim…

Electricity load forecasting for Urban area using weather forecast information

2016

The global demand for energy is increasing daily with the expansion of energy infrastructure and the addition of new appliances. Efficient Energy Management System (EMS) is the need of the day. All residential and commercial buildings can achieve better energy efficiency and consumption with the use of EMS. Load forecasting is one of the methods to enable EMS to work efficiently. The accuracy of load forecast depends on many factors. The load forecast model must consider the weather forecast for the region in developing an accurate forecast. This paper develops Artificial Neural Network (ANN) and Bagged Regression Trees to generate and predicted load forecast in Urban area using Meteorologi…

Geophysical investigations in the Flumendosa River Delta, Sardinia (Italy) — Seismic reflection imaging

2006

A geophysical investigation that included seismic-reflection surveying and time-domain electromagnetics (EM) was carried out in the Flumendosa River Delta plain in southeastern Sardinia, Italy. The objective was to improve knowledge of geologic and hydrogeologic controls on a highly productive aquifer hosted in thick Quaternary deposits and known to be affected by an extensive saltwater intrusion. The seismic reflection survey, whose results are reported here, aimed to image the Paleozoic bedrock topography and to obtain detailed structural and stratigraphic information on the sequence of largely fluvial sediments extending from the surface down to bedrock. The survey consisted of two inli…

Edukacyjne aspekty energetycznej globalizacji

2018

Wokół handlu energią i surowcami do jej produkcji skupiają się wszystkie klasyczne problemy związane z procesem globalizacji. Problemy ekologiczne wynikające z produkcji energii elektrycznej przekraczają granice polityczne, a realizacja celów pakietu klimatycznego oraz wdrażanie zasad zrównoważonego rozwoju napotyka na liczne bariery i jest szeroko kontestowane przez niektóre grupy społeczne. W związku z tym tworzy się przestrzeń do pogłębionych działań edukacyjnych i promocyjnych na ich rzecz. W prezentowanej pracy skupiono się na edukacyjnych aspektach związanych z tą problematyką oraz na wykorzystaniu w edukacji nieformalnej serwisów społecznościowych przy promowaniu zasad zrównoważonego…

Green electricity products in the United Kingdom, Germany and Finland

2014

In liberalized electricity markets, suppliers are offering several kinds of voluntary green electricity products marketed as environmentally friendly. This paper focuses on the development of these voluntary markets at household level in the UK, Germany and Finland. Since there are already existing renewable energy policies regulating and encouraging the use of renewable energy, it is important to consider whether voluntary products offer real additional benefits above these policies. Problems such as double counting or re-marketing hydropower produced in existing plants are identified. According to our study, the demand varies between countries: in Germany the number of green electricity c…

Requirements for Energy Efficient Edge Computing: A Survey

2018

Internet of Things is evolving heavily in these times. One of the major obstacle is energy consumption in the IoT devices (sensor nodes and wireless gateways). The IoT devices are often battery powered wireless devices and thus reducing the energy consumption in these devices is essential to lengthen the lifetime of the device without battery change. It is possible to lengthen battery lifetime by efficient but lightweight sensor data analysis in close proximity of the sensor. Performing part of the sensor data analysis in the end device can reduce the amount of data needed to transmit wirelessly. Transmitting data wirelessly is very energy consuming task. At the same time, the privacy and s…

Resource, environmental and economic considerations in the development of a Reverse Electrodialysis Heat Engine

The RED Heat Engine operates as a closed-loop RED system, where limited amounts of artificial saline solutions are used as working fluids. The solutions exiting from the RED unit are regenerated by means of a separation step, which uses low-temperature heat as its energy source. Essentially the system converts low-grade heat to electricity. There are two main alternative regeneration strategies: (i) extract solvent from the high salinity solution and move it to the low salinity solution or (ii) extract salt from the low salinity solution and move it to the high salinity solution. In this thesis are considered the Multi-effect distillation (MED) and the Membrane Distillation (MD) under the s…

Pricing of electricity futures based on locational price differences : empirical evidence from Finland

2016

Tietyn maantieteellisen alueen kilpailullisilla sähkömarkkinoilla on yleensä viitespot-hinta, joka kuvastaa yleistä hintatasoa tukkumarkkinalla, ja jota käytetään johdannaisten viitehintana. Paikallisten markkinoiden hinnat saattavat kuitenkin poiketa tästä viitehinnasta siirtoyhteyksien rajallisuuden takia. Pohjoismaisilla sähkömarkkinoilla ns. systeemi- ja tarjousalueen aluehinnan väliseltä basis-riskiltä suojaudutaan ns. aluehintaero-johdannaisilla (eng. Electricity Price Area Differential, EPAD). Tutkin tässä pro gradu- työssä Suomen tarjousalueen EPAD-tuotteiden ja vastaavan aluehintaeron yhteyttä. Koska sähkö ei ole varastoitavissa, yleisen näkemyksen mukaan sopiva sähköfutuurien hinn…