Energy


Jun

05

2019
Letter Ingenieros will lead the territorial delegation of Eastern Andalusia and the Balearic Islands of A3e

Letter Ingenieros will lead the territorial delegation of Eastern Andalusia and the Balearic Islands of A3e

On 9 April, the Board of Directors of the Association of Energy Efficiency Companies, A3e, in ordinary session appointed the 12 new territorial delegates.

The role of Letter Ingenieros, represented in this case by our Commercial Director, María Ávila, will be mainly to be the voice of the Association in Almería, Granada, Jaén and Málaga, as well as in the Balearic Islands, from our two offices in both locations.

This year’s proposal comes strong, trying to organize various events / conferences associated with other entities related to the sector, presenting the proposal also to different organizations such as University, Cluster, Associations, etc.. The aim is to present our success stories, share the latest developments in the sector, attract associates and resolve any doubts that may arise in terms of energy efficiency, renewable energies and new ways of achieving the energy transition that is being pursued.


Dec

14

2018
1ºWorkshop H2Smart project at the University of Granada

1ºWorkshop H2Smart project at the University of Granada

H2 Smart – An energy efficiency model for transport fleets

“The renewable hydrogen as an efficient solution in the design of a Smart City and its positive impact on a new model of sustainable mobility with vehicles emission 0” as a conclusion to a WorkShop, in which representatives of city councils, public entities and companies of Granada participated.

 

Iº Workshop on Hydrogen in Granada, organized by Letter Engineers

Within the framework of the H2 Smart Innovation project, led by Letter Ingenieros and supported by the Smart Cities Cluster of Andalusia and the University of Granada, the first H2Smart Workshop has taken place. in order to further advance the development of feasibility study on hydrogen technology as a real market solution to meet the challenge on the storage of energy from renewable sources.

The meeting, which took place on 12 December in the Cloisters Hall of the Faculty of Sciences of Granada, was a success because it raised a common interest among the more than 30 attendees: MAKE OUR CITIES UN HABITAT FREE NOx , EFFICIENT AND SUSTAINABLE.

workshop h2smart presentacion

Image 1. Hall Cloisters, Faculty of Sciences of Granada

The development of the Day.

For the development of the Workshop, Letter engineers opted for an unusual format, organizing attendees in work tables of common interests. The purpose was to reach a final conclusion, elaborated from the different profiles and points of view that were in the room.

In the first place we have the welcome of Mrs. María Carmen Carrión, illustrious Dean of the Faculty of Sciences who showed its sensitivity to renewable energy, research at the university, business involvement and the real possibilities of hydrogen as a totally clean and environmentally friendly alternative in this energy transition. He also thanked the presence of City Councils, Entities and companies.

Subsequently, Dr. Carlos Funes, head of the Open Innovation Unit of the National Hydrogen Center, was responsible for exposing renewable hydrogen technology and the costs of its generation. With this he demonstrated the profitable and ecological application of this technology in fleets of public buses and fleets of garbage trucks. From his speech, two interesting conclusions are drawn for the use of hydrogen in the development and planning of a Smart City:

  1. "The use of renewable energy to produce hydrogen and, in turn, use that hydrogen to the mobility sector can generate a positive business case today"
  2. "The most interesting approach for regions and cities is the production of renewable hydrogen and its consumption in captive fleets of buses and garbage trucks."

Later he spoke D. Juan Carlos García Abril, Director of Innovation and Projects Letter Engineers, who presented the project and its viability Smart H2 for Granada. It is presented as a great solution for the decarbonisation of the city and compliance with restrictive European policies. In addition, Juan Carlos García as a citizen of Granada, highlighted the serious problem of pollution that has Granada and its metropolitan area. Since 2008 the limits in NOx (called the invisible poison) and suspended particles have been exceeded, obtaining values similar to those of Madrid, Barcelona or Bilbao.

workshop granada university

Image 2. D. Juan Carlos García – H2Smart project exhibition

After a 45-minute networking, the workshop attendees were grouped into three working groups, in order to present their ideas, the pros and cons of hydrogen technology as a solution to the problems of our environment.

taller de trabajo sobre hidrogeno

Image 3. Networking

TABLE COUNCILS: Moderated by D. German Luzon González, professor and coordinator of Chemical Engineering at the University of Granada, and composed of representatives of various municipalities in the area of Granada. They aimed to know the reality of our municipalities, their concerns and management tools and financing used in the governance of our cities, in order to fit the viability of the H2 Smart project in the planning of Smart Cities. As a most important conclusion, it should be noted that all the representatives of this table agreed on the difficulty of reaching financing or approval of budgets to carry out projects of this nature, since they work more in the face of the citizen, than for environmental improvement a city or town. In addition, both mayors and technical highlighted the lack of staff or external experts in certain subjects, having an engineer for all, and the need to bring these projects through a common and applicable to all regulations. Finally, also it highlighted the lack of awareness in our citizens, not being aware that more than half a million deaths occur annually caused by pollution problems and air quality.

Table participants: Agenda 21 Local Town Hall of Granada, Armilla City Council, Salar City Council, Padul City Council and Albolote City Council.

h2smart ayuntamientos

Image 4. Town Councils table

TABLE ENTITIES: Moderated by Ms. María Ávila Montoro, Commercial Director of Letter Engineers, and formed by public entities of the Granada area. They aimed to know first-hand about future environmental planning policies and the challenges they face as financial managers. This table talked about the funds of aid that, to date, exist to be able to undertake projects of this type. The 20M € that were still available in the announcement for Intelligent Networks (Andalusian Energy Agency) and the Edusi Funds, which contemplate the execution of projects that improve air quality, were highlighted. In conclusion, it was emphasized that have a common strategic plan would be complicated by the multitude of actors are involved in the development of the (City Councils, Transport Consortium Companies, etc).  In addition, it was also specified that, in smaller municipalities, Sustainable Mobility Plans have been developed more focused on Crosswalk, Bike Rails and parking, instead of others aimed at solving the mobility driven by Diesel / Petrol combustion vehicle.

Table participants: Diputación de Granada, Cluster of Sustainable Construction of Andalusia, Provincial Energy Agency of Granada and Inagra.

h2smart entidades

Image 5. Entities table

COMPANY TABLE: Moderated by Don Juan Carlos García Abril, Director of Innovation and Projects of Letter Engineers, and formed by companies from Granada which represent the energy sector of the province. Its aim was to know the business vision of experts in management and installation of renewable energies, on the H2 Smart project and its viability in the province. During the development of this table, all the participants (who in some way generate energy from renewable energy) saw in the H2Smart project the main solution for the storage of energy in the form of renewable hydrogen. On the other hand, the companies highlighted the competitive advantage of hydrogen as a source of motor power in mobility compared to the electric vehicle. And it is that these vehicles not only have greater autonomy if not also have less charging time. On the other hand, the table entrepreneurs showed very interested in knowing actual data for technical and financial feasibility. This was intended to analyze the return on investment and to answer the question of: Would you be willing to invest in hydrogen vehicles? For this, D. Juan Carlos García, invited them to read the Business Plans which have been developed at the National Hydrogen Center.

Table participants: Grupo Cuerva, Construcciones Otero, Andasol, Windhunter, Iberdrola and A.E. Jérez del Marquesado.

h2smart empresas privadas

Image 6. Business table

End of the day and conclusions:

At 12:20 in the morning it was reached at the end of the workshop with a general conclusion of the three tables:

Renewable hydrogen as a clean energy source and zero-emission cycle, along with other technologies for sustainable mobility is the future in designing strategic plans of our Smart Cities. All this will be possible when a pilot project is developed which demonstrates the technical and financial viability of the great challenge posed by modal changes and air quality


Sep

28

2018
Letter Engineers and Renewable Hydrogen Cell in the Night of the Researchers

Letter Engineers and Renewable Hydrogen Cell in the Night of the Researchers

“If I do not know something, I will investigate it”. Louis Pasteur

What is the European Night of the Researchers?

In its seventh consecutive year, the european night of the researchers is a night in which both men and women do science for you. The main aim is to approach science and researchers to the general public in order to prove, in a practical and playful way, the relationship between research and daily life, and disseminate scientific investigations among young people.

This initiative is a European scientific dissemination project promoted by the European Commission within the Marie Sktodowska-Curie actions of the Horizon 2020 program, which it takes place simultaneously in over 340 European cities since 2005.

Letter Engineers and the experiment for the night of the researchers

In this edition of 2018 Letter Engineers participates together with the University in an experiment in which we will make renowable hydrogen and, subsequently, energy in a fuel cell.

The process can be seen in the following scheme:

  1. The solar module converts sunlight into current
  2. This current is carried to the electrolyser where the water molecule breaks down into hydrogen and oxygen
  3. The gases produced are stored in the test tubes that the electrolyser has
  4. Hydrogen and oxygen are put into the fuel cell where they are converted into electric current
  5. The current produced lights the lamp

We filled the electrolyser with about 50 ml distilled water.

The solar module should be tilted towards the highest radiation to generate between 150 and 350 mA at a voltage of 2.4V. This can be seen with the ammeter.

At about 10 minutes we will see the water bubble and, on each side of the electrolyser, we will collect both gases. We will be producing about 3 ml of hydrogen.

Do you want to see how this renewable hydrogen battery works?

We are waiting for you this afternoon at 18:00 in the STAND 8_UGR.

10, Square of the Humilladero, Paseo del Salón

Granada, 18005


Sep

17

2018
Streetlights history: from Catalan Society of Gas to Barcelona Energy

Streetlights history: from Catalan Society of Gas to Barcelona Energy

We have all seen in movies those oil lamps or candles lighting the streets of cities, but when is street lighting modernized in Spain? What was the first public tender to manage this facility? In Letter Engineers we recently arrived at Barcelona City Council and we have found very interesting data.

We must go back to the nineteenth century, namely the year 1826, so that in Barcelona lights as street lighting system the first gas lamp. According to historians, it is the first time that the streets are lit enough to not feel unprotected.

The City Council of Barcelona convened in 1841 a public lighting contest won by a French industrial engineer. This one founded two years later the company Catalan Society for gas lighting. We currently know it as Naturgy or, the most backward, by Gas Natural Fenosa. As a curiosity, to comment that the street lighting service comes to Barcelona before running water to homes.

During the twentieth century, with the discovery of electric light, began the decline of gas lights since this new system was much cheaper, comfortable and durable. The gas discharge lamps arrive in which, through electricity, the luminescence phenomenon is achieved. One of the first gases used is mercury vapor which, for those who do not know, emits with a wave in which the ultraviolet predominates. Later improves efficiency in street lighting with the arrival of sodium vapor and its characteristic orange color. A few years ago, and it entered the new century, break into the LED technology in street lighting.

Because of the energy transition we live currently marketing energy undergoes radical changes daily. For more than 20 years, the electricity sector in Spain has been liberalized and, nevertheless, it has not been an effective Law as such. Therefore new models to appear Energy Barcelona have emerged. The council manages the generation and marketing in their own facilities. To generate uses different renewable sources such as photovoltaic and wind. However, it is methane from garbage which it gets its greatest green energy.

In Letter Engineers committed to new energy management models for municipal street lighting. We believe that these new models have a lot to say and here we will be to help them in this difficult way.


Aug

17

2018
Vehículos Eléctricos en punto de Recarga

Experts in Exterior Electricity Projects – Recharge Points

One of the great challenges of this society is to achieve the change of the current energy model for another more sustainable, more efficient, more environmentally friendly and, of course, to ensure an improved social and economic world

That is why, and the unsustainability of the current energy model based on the consumption of fossil fuels that has so many harmful effects for all of us (when I say of harmful,  I not only am referring to climate change), that the Electric Vehicle is being introduced in society as a GREAT alternative to our system of public and private mobility.

While it is true, we still have many who have doubts and especially when we think: where do I plug it if I go on a trip? … since, in many territories, there is not yet a recharge network that gives us peace of mind when we move our electric vehicle. To do this, there are a number of existing aid to carry out investments in charging equipment for electric vehicles.

Aids to encourage the use of the Electric Vehicle

In Andalusia, within the Intelligent Networks area of the Program for the Sustainable Energy Development of Andalusia we find very interesting incentive lines that have the following aims:

PROMOTE THE TRANSFORMATION OF OUR COUNTRY TOWARDS A SMART CITY MODEL, THROUGH A SUSTAINABLE ENERGY DEVELOPMENT THAT IS RESPECTFUL TO THE ENVIRONMENT

With this aid: what is encouraged?

The purpose of this line of aid is the development of infrastructures that facilitate the use of electricity, or the use of gas or hydrogen in the transport of people or goods, with actions such as:

CHARGING FACILITIES FOR SINGLE USE

RECHARGE FACILITIES PUBLICLY AVAILABLE

O RECHARGE ADVANCED FACILITIES

and for municipalities with fewer than 20.000 habitants, the percentage of aid can reach up to 70% of the fundable costs.

How can Letter Engineers help you?

Letter Engineers experts in efficient energy management systems, has a technical office formed by experts from various branches of engineering and environment, who are responsible for advising our clients and potential clients on fundable projects, such as those related to the Electric Vehicle

In addition, in our engineering department LETTER ING we have experts electrical engineers in ELECTRICITY OUTSIDE and relaxed experience in technical assistance for project development, preliminary and tender documents, design and project development, licensing, environmental impact studies and management of projects of this type.

Do not hesitate and contact our experts, a sustainable future is possible if we all take part.


Aug

10

2018
Estación de recarga TESLA de vehículos eléctricos.

The electric vehicle, how does it work?

Because of the major environmental problems, congestion in cities, their high levels of pollution, and the new energy framework of Spain, the electric vehicle is taking a special role in our daily conversations.

How does an electric car work?

From Letter Engineers, we will try to explain in a clear and simple way how an electric car works. For this, we will focus on its two fundamental parts: the electric motor and the battery.

Basic concepts

The first thing we have to understand is the concept of current as well as the two types of current that we have, continuous (DC) and alternate (AC). The current is basically the flow of electrons through a conductive medium such as a cable. Depending on the amount of flow we have more or less amperes (A), which is how the intensity or electric current is measured. For the electrons to move, a potential differential (Volts) is necessary, just as a river needs a height difference for the water to run.

If the flow of electrons is more or less constant and in one direction, from one pole to another, we are talking about direct current. On the other hand, if the flow changes every certain time (cycle), we will have alternating current. In Spain these cycles are 50 Hz, meaning the direction changes 50 times per second.

Normally we will use direct current for small electronic devices to about 24V. We use the alternating current for more voltage, for example at home we get 230V in single phase (one phase) and 400V if we had a supply in three phase (three phases). We use alternating current because unlike the continuous one it can be increased or decreased its voltage easily in transformers. If we want to move electrical energy at a great distance we will increase its voltage at the cost of decreasing its intensity so that we will have less losses (Ohm’s Law). The great advantage of direct current is that we can store it, chemically, for example in a battery, then we will see how. This is how our mobile works.

The device that converts alternating current into continuous is called a power supply, while the device that converts the continuous current into alternating current is called an inverter.

The product of the current (A) by the voltage (V) gives us the power that is measured in Watts (W); Well, this is not entirely true, but we can do for now. Do not confuse the power in W with the energy that is measured in Wh. Energy is the product of power by time.

We have summarized the most to make it clear and simple, however, if you have questions on these concepts you can contact us so that we expand these fundamentals.

Traction Battery

It is one of the most important parts of an electric car. Not to be confused with the service battery that is 12 or 24V we currently have and that feeds the lights, radio, etc.

The traction battery is a set of cells that store continuous electrical energy in a chemical way. Electric power is obtained from an external plug (at home or on public roads where we already know that it is alternating energy), but the battery has to arrive in continuous mode so we use a power source (known as a charger).

The BMS monitors the loading and unloading status of each cell, let’s say it is the one that controls the battery. It is very useful to manage, for example, fast loading. Here what we do is take each cell up to 80-90% of its capacity leaving the rest free. In a battery which is the longest completely filled cell and fast charging it makes use of this topic.

Electric motor vs combustion

Due to Nikola Tesla in 1893, today we have AC motors, a simple way to convert electrical energy into mechanical. Due to mechanical energy we can move the wheels of a car passing previously by the transmission shaft.

An electric motor is nothing more than an enclosure where you have a stator (fixed part) and a rotor (moving part). Depending on the engine type we have some magnets which have a power to create a electromagnetic fields that move the rotor. The good thing about this is that investing in the engine cycle can act as a generator and spend mechanical energy into electricity. This is used to store energy in the battery taking advantage of braking and lowering.

Most electric cars are powered by a three-phase AC motor. From the battery, where we know that we have continuous power, we need an inverter to pass it to AC. Depending on the energy that passes through the engine we have more or less revolutions (RPM) and therefore power. Out of curiosity comment that we can reach 15,000 or 20,000 RPM. The maximum power in an electric is obtained from the initial moment since we have the maximum torque.

A combustion engine (those of a lifetime) instead of electricity works by combustion of a fuel (gasoline, diesel, gas …) in an explosion-compression engine in pistons. The main problem is that as a byproduct of the reaction, gases are generated that, depending on the fuel, are more or less polluting.

An electric motor is much smaller than a combustion engine and with many fewer parts. We also have much less friction parts and therefore less maintenance. The power curve in an electric motor is linear and we have all the power available at the start, however, in combustion we have little power at low revolutions. This causes that in an electric we do not need a gearbox.

Electric car charging point


Jul

20

2018
Nuevo Panorama Energético Español

Energy Transition in Spain. We explain it to you

“The most difficult thing is to leave from a model where there is a series of investments and positions created, towards another much more plural, diverse and positive energy model”

“It’s time for sustainable development” words of Teresa Rivera, Minister of Energy and Environment.

For any citizen is becoming common to hear talk about “decarbonisation of energy”. Mainly we need energy for the buildings and for the transport leaving aside other uses such as the industrial one. We are going to focus on analyzing what is happening in these two sectors with the energy transition that we are already experiencing.

To understand the concept of decarbonisation we have to comprehend which the energy we need is obtained from fossil fuels (coal and gas in combined cycles), nuclear or renewable energy plants. According to the recent report by Spanish Red Electrica (REE) electricity demand in 2017 was supplied as follows:

The new Government, with Minister Teresa Ribero at the head, has already indicated its intention to finish in less than 10 years (2028) with the coal and nuclear power plants. We quickly realize that we will need 38.1% of the 252 TWh of current annual demand. We can already get an idea of the potential that renewables have in this transition.

On the other hand we have the issue of CO2 emissions. We all know which the nuclear ones do not have emissions and they contribute to reduce the global compute. This year we have increased our emissions by 5% and is expected to continue being done in the coming years. Therefore it is very important which everything is done very well analyzed as it is also expected that the ton of CO2 will pass in a few years to cost € 30 to € 100. Yes, you listened well, we paid for the emissions. We even pay for nuclear waste, in this case € 75,000 / year to France.

According to the International Labour Organization, throughout this transition process will be created four posts jobs for every one destroyed. The sectors with more opportunities: renewable in buildings, sustainable mobility with electricity and gas, energy management active and intelligent of smartcity. Among them are synergies as the exchange of energy between cars, urban equipment and buildings, all aimed to build cities of the future in which the citizen owns his energy, produce and consume.


Jun

27

2018
Management and control of public lighting in Barcelona City – AWARDED

Management and control of public lighting in Barcelona City – AWARDED

Letter Engineers is awarded the service of management and control of public lighting of the City of Barcelona for 4 years.

Technical Assistance and Management of Public Lighting

The object of the contract is double: to be technical assistance in support of the operation of the control system as well as manage and optimize energy consumption.

Barcelona City Council decided in 2016 for a new centralized control service for its public lighting. The control is based on monitoring and supervision through a platform that integrates all the energy and maintenance aspects. Since 2018 this service will be managed by Letter Engineers and Bettergy, who will work closely with public lighting services of the City Hall. If everything goes well the company intends to be at least until 2022, since it is a contract extendable in 2 + 2 years.

Currently the scope of the contract consists of 2,909 command centers of which 60% of them are remote managed. The vast majority of them communicate with radio technology through 6 receivers, although there is also point-to-point management. In addition, in recent years they have been adding energy-saving measures such as flow regulators and LED lamps with different levels.

One of the most innovative systems in which we are working is the dynamic control of luminosity from lux measurements every 15 seconds. System implemented for years and that will be refined in the next.

Now Letter Engineers manages the public lighting of two of the largest and most emblematic Spanish city halls: Barcelona and Palma de Mallorca. Recall that we were awarded the contract to Palma in 2015 for a total of 4 years ending next year. With all this, the company strengthens and consolidates as the national benchmark in the efficient management of public lighting.


Jun

07

2018
Letter Engineers, Member of the Clúster Andalucía Smart City

Letter Engineers, Member of the Clúster Andalucía Smart City

Recognized as an Innovative Business Group in 2015, the Clúster Andalucía Smart City is an alliance of private companies and Andalusian public institutions working for the development of smart cities, and of which LETTER ENGINEERS is already a member.

Andalucía Smart City

The Cluster Andalusia Smart City is an alliance of private companies and Andalusian public institutions that work for the development of smart cities, understood as better cities for being efficient, sustainable and comfortable. Achieving this goal it is realized through cooperation among these entities, resulting in generation of employment and wealth in urban areas themselves by increasing business competitiveness.

What does Letter Engineers contribute to the Cluster?

The Andalusia Smart City Cluster is formed by different working groups such as the Energy Working Group, which develops its activity around the generation, distribution, consumption and energy saving in cities. Or Environment Working Group, articulated around the impact of cities on the environment, greenhouse gas emissions and water and waste management.

Letter Engineers has been working for efficiency for 5 years. Its powerful team of computer engineers, advised by the energy experts, have developed their own management tools and efficient control of public lighting, managing to manage large cities in a more sustainable and more respectful with the environment.

In addition Letter Engineers team composed of Engineers, Architects and Graduates are people with tradition and over 10 years of experience in the industry, making Letter Engineers company of great business value to the development of a more sustainable Andalucía.


May

30

2018
Adjudicado - Auditorías energéticas

Energy Audit in buildings of Talavera de la Reina – AWARDED

Letter Engineers company responsible for carrying out the work of “Energy audit and technical memory of the actions to be taken in buildings of municipal ownership in the town hall of Talavera de la Reina”.

Award to Letter Engineers: Contract requirements

As was already mentioned, Letter Engineers has been the company Awardee to carry out the Energy Efficiency project in several buildings in the municipality of Talavera de la Reina.

As an indispensable requirement for the Town Hall, it is that the results obtained from these Audits serve as the basis to fulfill the aims of the Feder Castilla – La Mancha Operational Program 2014-2020.

For this, Letter Engineers will perform the works according to the PROTOCOL ESTABLISHED BY THE BOARD OF COMMUNITIES OF CASTILLA – LA MANCHA.

The social center, the sports hall or the fire station (among others) are the buildings in which the technical team of Letter Engineers will analyze, visit and study in detail all the facilities and equipment consuming energy. The aim is to propose a series of measures in line with the building energy saving, its use and its current situation.

What is an Energy Audit?

An energy audit is an analysis that allows us to know the mode of working, operation and performance of existing facilities, in this case, in a public building of municipal ownership, the state of its components, energy consumption and corresponding operating costs , with the aim of:

  1. Improve energy efficiency and energy savings of these facilities
  2. Adjust and adapt these facilities to current regulations

What technical means are necessary to successfully develop this contract?

The energy audit to be carried out and the team of Letter Engineers designated for it, complies with the provisions of RD 56/2016, of February 12, which transposes the directive 2012/27 / EU of the European Parliament and the council, of 25 October 2012 on energy efficiency in terms of energy audits, accreditation of service providers and energy auditors and promoting efficiency of energy supply, especially Article 8 thereof.

Energy Efficiency: Key to achieving European goals 2020

As indicated in Royal Decree 56/2016, of 12 February, which transposes Directive 2012/27 / EU of the European Parliament and of the Council, of October 25, 2012, relating to Energy Efficiency, this it is defined as an essential aspect of the European strategy for sustainable growth in the 2020 horizon, and therefore it is one of the most profitable ways to strengthen the security of energy supply and to reduce greenhouse gas emissions and of other polluting substances.



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