Cristina Camus - Academia.edu (original) (raw)

Papers by Cristina Camus

2022 18th International Conference on the European Energy Market (EEM)

2018 International Young Engineers Forum (YEF-ECE), 2018

Nowadays, it is imperative to use renewable energy as a source for electricity generation. Energy... more Nowadays, it is imperative to use renewable energy as a source for electricity generation. Energy production by self-consumption and lower costs photovoltaic (PV) panels has created a market for an increase in distributed PV generation. A self-consumption unit may waste almost all-day production if it doesn't match consumption and if there are no batteries in the system. In this case, most part of the energy generated is sold to the public grid. To avoid this situation, these panels should be installed, not in habitation houses, but in people's workplace, that is, public buildings, where photovoltaic production coincides with the load diagram peak of the building, reducing the amount of energy sold to the public grid. In addition, electricity generation decentralization avoids energy losses during transportation and distribution and reduces the number of large electrical plants, significantly contributing to the success of Paris Conference targets that are intended to slow down climate change. In summary, the main objective of this work is to study and evaluate the economic and energy impacts of photovoltaic panels installed in public buildings. Specifically, profitability study of a facility, which is very positive with an IRR of 14, % and an 8-year pay-back.

2016 13th International Conference on the European Energy Market (EEM), 2016

Due to the demise of FiT, PV grid connected systems focused towards self-consumption. A residenti... more Due to the demise of FiT, PV grid connected systems focused towards self-consumption. A residential customer installing a grid-connected PV system, usually called a "prosumer", is paid for the exported electricity less than 5 c€/kWh (or nothing) by the electricity provider while charged about 16/17c€/kWh for the same kWh. At this exchange rate it is more economical to consume than to export. Residential consumption does not coincide with PV production and the majority of the energy produced will be exported to the grid instead of self-consumed. NPV maximizes at a 95% of selfconsumption in the best case studies which usually is attained with small percentage of self-sufficiency and low power installed. With further increase of retail electricity prices and decrease of PV costs the business case for storage becomes economically viable for residential customers with the advantage of increasing self-sufficiency and energy efficiency (energy is generated locally).

2008 5th International Conference on the European Electricity Market, 2008

... To benefit from the special tariff, a solar thermal collector of 2 m2 area, need also to be i... more ... To benefit from the special tariff, a solar thermal collector of 2 m2 area, need also to be installed. D. Evaluation of a micro wind system A same analysis can be done for the investment in a 1 kWmicro wind turbine adequate for installation in the roof of a building or a house. ...

New Generation of Electric Vehicles, 2012

2011 8th International Conference on the European Energy Market, EEM 11, 2011

9th International Conference on the European Energy Market, EEM 12, 2012

ABSTRACT Electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), which obtain their... more ABSTRACT Electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), which obtain their fuel from the grid by charging a battery, are set to be introduced into the mass market and expected to contribute to oil consumption reduction. This research is concerned with studying the potential impacts on the electric utilities of large-scale adoption of plug-in electric vehicles from the perspective of electricity demand, fossil fuels use, CO2 emissions and energy costs. Simulations were applied to the Portuguese case study in order to analyze what would be the optimal recharge profile and EV penetration in an energy-oriented, an emissions-oriented and a cost-oriented objective. The objectives considered were: The leveling of load profiles, minimization of daily emissions and minimization of daily wholesale costs. Almost all solutions point to an off-peak recharge and a 50% reduction in daily wholesale costs can be verified from a peak recharge scenario to an off-peak recharge for a 2 million EVs in 2020. A 15% improvement in the daily total wholesale costs can be verified in the costs minimization objective when compared with the off-peak scenario result.

POWERENG 2009 - 2nd International Conference on Power Engineering, Energy and Electrical Drives Proceedings, 2009

... of Utility System Impacts and Benefits of Optimally Dispatched Plug-In Hybrid Electric Vehicl... more ... of Utility System Impacts and Benefits of Optimally Dispatched Plug-In Hybrid Electric Vehicles, Technical Report NREL/TP-620-40293, October 2006 [7] K. Parks, P. Denholm, T. Markel, Costs and Emissions Associated with Plug-in Hybrid Electric Vehicle Charging in the Xcel ...

Electric Vehicles â€“ The Benefits and Barriers, 2011

Energy Policy, 2012

Most of small islands around the world today, are dependent on imported fossil fuels for the majo... more Most of small islands around the world today, are dependent on imported fossil fuels for the majority of their energy needs especially for transport activities and electricity production. The use of locally renewable energy resources and the implementation of energy efficiency measures could make a significant contribution to their economic development by reducing fossil fuel imports. An electrification of vehicles has been suggested as a way to both reduce pollutant emissions and increase security of supply of the transportation sector by reducing the dependence on oil products imports and facilitate the accommodation of renewable electricity generation, such as wind and, in the case of volcanic islands like São Miguel (Azores) of the geothermal energy whose penetration has been limited by the valley electricity consumption level. In this research, three scenarios of EV penetration were studied and it was verified that, for a 15% LD fleet replacement by EVs with 90% of all energy needs occurring during the night, the accommodation of 10 MW of new geothermal capacity becomes viable. Under this scenario, reductions of 8% in electricity costs, 14% in energy, 23% in fossil fuels use and CO 2 emissions for the transportation and electricity production sectors could be expected.

Energy Policy, 2011

Electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), which obtain their fuel fro... more Electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), which obtain their fuel from the grid by charging a battery, are set to be introduced into the mass market and expected to contribute to oil consumption reduction. In this research, scenarios for 2020 EVs penetration and charging profiles are studied integrated with different hypotheses for electricity production mix. The impacts in load profiles, spot electricity prices and emissions are obtained for the Portuguese case study. Simulations for year 2020, in a scenario of low hydro production and high prices, resulted in energy costs for EVs recharge of 20 cents/kWh, with 2 million EVs charging mainly at evening peak hours. On the other hand, in an off-peak recharge, a high hydro production and low wholesale prices' scenario, recharge costs could be reduced to 5.6 cents/kWh. In these extreme cases, EV's energy prices were between 0.9h to 3.2h per 100 km. Reductions in primary energy consumption, fossil fuels use and CO 2 emissions of up to 3%, 14% and 10%, respectively, were verified (for a 2 million EVs' penetration and a dry year's off-peak recharge scenario) from the transportation and electricity sectors together when compared with a BAU scenario without EVs.