Energy efficiency and renewable energy sources. Common international terminology

The article is devoted to the issues of the functioning and development of energy in each country, caused mainly by the economic expediency of renewable energy and the requirements of energy independence. Also, the article examines the importance of replacing traditional fuels with alternative energy sources. The international experience of the countries in the field of efficient use of available natural resources of the fuel and energy complex and enhancement of the potential of the energy sector have been analyzed. A number of common characteristics and directions of energy efficiency improvement for European countries are highlighted. Alternative types of energy and measures necessary for their implementation have been offered. The potential resources of renewable energy sources have been analyzed. The article is devoted to the use of economical and ecological type of fuel - biofuel for Ukraine. On the basis of the analysis of the situation on the energy market, renewable energy is examine, which plays a compensatory role in global energy consumption in the conditions of growing exhaustion of non-renewable sources.

Download Full-text

Energy Efficiency – Indoor Air Quality Dilemma in Educational Buildings: A Possible Solution

Environmental and Climate Technologies ◽

10.2478/rtuect-2020-0020 ◽

2020 ◽

Vol 24 (1) ◽

pp. 357-367

Author(s):

Liva Asere ◽

Andra Blumberga

Keyword(s):

Energy Efficiency ◽

Renewable Energy ◽

Air Quality ◽

Indoor Air Quality ◽

Indoor Air ◽

Renewable Energy Sources ◽

Energy Sources ◽

Pv System ◽

Educational Buildings ◽

Electricity Tariff

AbstractThe energy efficiency – indoor air quality dilemma is well known and the main drawback to operate the mechanical ventilation is electricity costs as concluded from previous studies. Educational buildings are one of the places where future taxpayers spend a lot of time. This paper aims to study an alternative solution on how to reduce energy efficiency – indoor air quality dilemma in educational buildings by adopting systems that use renewable energy sources. A typical education building in Latvia is taken as a case study by changing it from a consumer to prosumer. This building type has a specific electricity usage profile that makes the choice of photovoltaics (PV) power quite challenging so the various power options have been analysed and used for an electricity solution. Also, the more decentralised preference is chosen – disconnect from a public heating provider and using a local system with a pellet boiler. Educational buildings using PV can reduce the electricity tariff, but the payback periods are still not very satisfactory without subsidies. The average electricity tariff per month varies between scenarios and the best one is for the scenario with 30 kW installed power. The educational building partly using 16 kW PV system reduces not only its bill for electricity but also reduces CO2 emissions by around 36 tons. The education buildings as energy prosumers using renewable energy sources are reducing GHG emissions by having high indoor air quality.

Download Full-text

Energy benchmarking in educational buildings in the city of Kragujevac - possibilities for energy efficiency improvement

Serbian Journal of Electrical Engineering ◽

10.2298/sjee2101095r ◽

2021 ◽

Vol 18 (1) ◽

pp. 95-114

Author(s):

Ana Radojevic ◽

Danijela Nikolic ◽

Jasna Radulovic ◽

Jasmina Skerlic

Keyword(s):

Energy Efficiency ◽

Renewable Energy ◽

Energy Consumption ◽

Co2 Emissions ◽

Renewable Energy Sources ◽

Electricity Consumption ◽

Energy Sources ◽

Efficiency Improvement ◽

Energy Efficiency Improvement ◽

Energy Benchmarking

The implementation of energy efficiency measures and use of renewable energy sources in educational buildings can significantly contribute to reducing energy consumption, but also to CO2 emissions in the entire public sector. The paper shows the comparison of energy consumption indicators for 61 elementary school buildings which have previously been divided in 12 groups, according to the period of construction and size, based on the national typology called TABULA, as the first step of further study on how to use the renewable energy sources. The aim of this paper is to use the energy benchmarking process to select representative facilities which are suitable for applying renewable energy sources, for their further energy efficiency improvement. Indicators of annual specific electricity consumption and CO2 emissions per unit area [kWh/m2] and per user [kWh/user] were calculated. After that, from two groups (in which the highest electricity consumption and CO2 emissions are 68.37% and 74.53% of the total consumption/ emissions), one representative facility was selected.

Download Full-text

Refurbishment of a house in a historical building: energy saving, electrification and flexibility

E3S Web of Conferences ◽

10.1051/e3sconf/202019702010 ◽

2020 ◽

Vol 197 ◽

pp. 02010

Author(s):

Giada Romano ◽

Elisa Pennacchia ◽

Sofia Agostinelli

Keyword(s):

Energy Efficiency ◽

Renewable Energy ◽

Energy Saving ◽

Renewable Energy Sources ◽

Energy Performance ◽

Building Envelope ◽

Energy Sources ◽

Automation Systems ◽

Architectural Constraints ◽

Current Energy

Buildings with architectural constraints and recognized historical values require a careful design process, aiming to combine the needs of conservation and the adaptation of the buildings to the modern use and its accessibility. The feasible interventions consist in improving the energy performance of the building envelope, in inserting efficient technological systems and using renewable energy sources where possible. The compatibility between the architectural constraints of the building and its more sustainable future use represents a crucial challenge. This work presents the interventions designed and realized on a small villa located in the Prati district, in Rome. Starting from the requests of the client, the primary objective was to create a comfortable house both in the winter and in the summer season, with widespread use of automation systems for managing the utilities. In line with the current energy scenario, the interventions were oriented to energy efficiency, the reduction of polluting emissions, the electrification of utilities and the use of renewable energy sources. The proposed solutions showed high gains in terms of energy saving even if the changes to the building envelope were limited by the desire to preserve the values of the cultural heritage. Therefore, a virtuous refurbishment can effectively respond to current energy efficiency goals.

Download Full-text

Energy and Energy Efficiency

Technologies for Electrical Power Conversion, Efficiency, and Distribution ◽

10.4018/978-1-61520-647-6.ch001 ◽

2010 ◽

pp. 1-9

Keyword(s):

Energy Efficiency ◽

Renewable Energy ◽

Nuclear Waste ◽

Nuclear Power ◽

Fossil Fuels ◽

18Th Century ◽

Renewable Energy Sources ◽

Nuclear Power Engineering ◽

Energy Sources ◽

The World

Originally, coal was the main source of energy. It remains so throughout the 18th century during the period of the rapid industry development. Later on, oil and naphtha began to be used as energy sources and their usage expanded especially in 19th century. A special feature of the above mentioned fossil fuels is their long creation period – requiring millennia. They are a result of rotting of different plant and animal kinds. In comparison to the period of their formation, the period of their utilization is far shorter. In accordance with a number of existing statistics about 2050 year it may be talked about a depletion of the liquid fossil fuels, also, the world coal supplies are considered to last within the next 200 years. Therefore, the development of nuclear power engineering is considered to be one of the alternatives to generate energy. Recently, the nuclear power energy generation has been denied in many countries because of the risks associated with its generation and because these risks have been confirmed by serious accidents throughout the World. The storage of worked nuclear waste is also a problem and risky. The renewable energy sources are another possibility to generate energy.

Download Full-text