Implementation

Even the greatest plans require a highly-experienced, reliable contractor background. Our team possesses the two basic pillars of high-level project realization: the correct, expertise constructional and management professionals. We have set up our own stabile subcontractor base with whom we are working together for long years now and able to cover each field of electric industry and renewing energy tasks.

Wind-, biomass-, biogas-, hydro- or solar power plants, traditional building electricity, low-, middle- and high-voltage electrical facilities, energy-efficiency audit of public institutions and residential buildings; we have the appropriate professional team who control the given project on general contractor level with proven and solid subcontractor groups. In our view, the project implementation process includes not only the assembly and establishment works according to the designs but also the overall project realization with the installation and operation. We perform the complete operational and maintenance tasks in 80% of our realized projects.

 

1. Biogas Power Plants

Biogas plants produce biogas (55-60% methane, 35-40% carbon-dioxide, <1% other gases, steam) from organic wastes through anaerobic fermentation which may be utilized for energetic purposes. Biogas has a good efficiency level when used for energy generation: either without cleaning, burnt in block heating plants, in gas engines producing electric- and heating energy or in cleaned form used as bio fuel for vehicles.

Biogas is mainly released through the activity of bacteria, its demolition is a complex, multi-level process carried out through the symbiotic relation of several bacteria strains. The proper conditions of the certain steps is highly important from the point of view of biogas production.
 
The traditional anaerobic digesters usually operate on mesophilic (35-40°C) or termophilic (50-55°C) temperature levels. Due to the above, a good deal of organic wastes may be disposed of in the biogas plants and, depending on the processed wastes, the fermentation remains at the end of the process may even serve as quality soil supply.
 
 
Biogas is mainly produced from the below commodities:
  • animal metabolic products, manure,
  • slaughterhouse wastes,
  • restaurant food remains, slop, bakery remains,
  • fruit procession wastes, cannery wastes,
  • vegetable refuse (grass, sugar sorghum, fodder remains),
  • wastewater sludge.

The advantages of biogas technology pursuant to the above:

  • electric and heating energy production,
  • transformation of organic wastes into excellent quality manure,
  • improvement of hygienic conditions by the reduction of the prevalence of the occurrence causative agents
  • environmental advantages due to the protection of soil, water and air,
  • supplementary income of the farmers through energy and manure production,
  • macroeconomic advantages by ways of decentralized energy generation and environment protection
  • long-term profitable investment.

2. Photovoltaic Power Plants

Photovoltaic panels or solar cells utilize the photo electric phenomenon which means the direct transformation of the Sun's radiant energy into electric energy.
PV-panels operate under the effect of light, such as direct or indirect sunlight or other type of light resource. The above mentioned electromagnetic radiance generates free carriers in the semiconductor of the solar panel's basic material, which triggers voltage drop on the electrodes of the PV-panel. If the metal electrodes are connected through an outer circuit, the outside circuit shall conduct direct current, proportioned in degree to the lighting intensity of the PV-panel. The current strength is defined by the number of the generated free chargers, while the voltage is dependent on the nature of the base material.
 
 
PV-panel Types:
Monocrystalline PV-panels:
• The manufacturer guarantees 25 years' power durability at 80% operation for the monocrystalline PV-panels. 
• Anodized aluminium frame and tempered glass with enhanced transmission which resist even the nut-size stone hails.
• Rigid, multi-layer, Tedlar back foil.
• Excellent price/value ratio.
 
Policrystalline PV-panels:
• Advantages: Relatively high efficiency among the PV-panel types, in this respect follows the monocrystalline type in order, in proportion to the surface. Its price is somewhat more favourable than that of the monocrystalline types.
• Disadvantages: It requires bigger surface for the same power output than the monocrystalline type.

 

Complete Photovoltaic System

We differentiate 2 modes of operation:
• Isolated system 
• Input into the network
 
The main difference between the two systems is that in case of the isolated system the produced energy must be stored while it is not necessary in case it is input into the network.
 
Before the establishment of the photovoltaic system, the actual electric energy usage must be calculated and the output of the system to be implemented should be defined according to that. 
 
Main elements of the photovoltaic system:
• Solar panels and their related supporting structures 
• Inverters 
• Fuse case
• Bidirectional measuring device (in case of input into the network)
• Accumulator
 
The establishment of the PV system does not require a license. The power supply company should be noticed of the purpose with the data of the type and output of the planned system. The application is assessed by the authority in 6-8 weeks' time.
As compared to other types of energy generation systems, PV electric energy production possesses the following advantages:
• The utilized energy source is freely available
• No moving elements in the systems (see as opposition the turbines of the wind power plants)
• Soundproof operation
• Produces directly electric energy
• The system may be integrated on the roof or exterior coating of the building
Low maintenance costs
• Clear energy production form with minimal environmental risks

 

3. Wind Power Plants

Wind energy is clear, renewing and sustainable; a new means of current production. Energy generation always effects the environment in one way or another, however wind power plant effects it minimally. The wind power plant does not emit any kind of material which may trigger greenhouse effect and so does not shift the responsibility of environmental protection tasks to the future generations.

The establishment of wind power plants is a kind of investment which is an actual demonstration of environment protection and the utilization of renewing energy sources.

 

Milestones of the establishment:

Site selection - to be taken into account:

- Wind capacity factor

- Topographical conditions of the territory

- Ecological conditions (eg: protected animals)

- Availability of network connection points

• Authority and public utility coordination

Aim: to explore whether the establishment of the wind power plant on the given area trespasses on the interests of the authorities. The authority and public utility statements may be used later, during the building permitting process.

• Agreement with the land proprietor and the local municipality

Wind potential survey

- Mapping of the wind conditions of the given area, which is relevant for the calculation of dimensioning and energy production. The survey should last minimum 3 months but it is advised to make measurements for a 1 year period.

- Promotion of decision making regarding the realization of the project.

- Forecast of the expected electric energy production data.

• Contact with the wind turbine manufacturer, selection of the machine type.

• Machine arrangement

Permitting:

- Environmental permit

- Building permit

- Hungarian Energy and Public Utility Regulatory Authority permit: in possession of the Hungarian Trading Licensing Office decree, the wind power plant establishment under 50kW power does not require further permit

Conclusion of the network connection contract

• Detailed design plan, permitting, implementation

• Conclusion of operational code contract

 Main steps of the implementation of wind power plants:

• Delivery of wind turbines to the site of establishment

• Construction of access roads or reconstruction of the existing roads dimensioned to the loading of heavy vehicles

• Site preparation according to the humus management plan

Foundation and concrete works

Cable laying

• Technological assembly, set up of wind turbines 

• Establishment of switching and transformer station, set up of related fences

• Landscaping works

• Test run and final run.

 

Deciding factors of the wind power plant establishment:

• Local capabilities (topographical, ecological conditions)

• Available quota

• Wind conditions of the given area (preliminary wind potential survey)

• Electric power to be produced

• Distance from residential area 

Accessibility of network connection

4. Biomass Power Plants

The energy use and demand of humanity was multiplied by 10 during the last century. The increasing rate of environment pollution forces us to turn to more environment friendly energy sources.
At present, the available energy sources may be sorted as fossil (not-renewing) and non-fossil (renewing) energy sources.
Fossil, that is non-renewing are for instance: uranium, natural gas, oil, stone coal and brown coal. Renewing sources: wind, sun, geothermal energy, water, tide energy, biomass, biogas.
 
Biomass, in its wider sense, includes the yearly reproduced organic materials (tree, grass, agricultural products), their byproducts (remains, organic wastes, wastewater sludge) and the biogas produced from the above.
 
 
The types of biomass to be used for energetic purposes and which stem from agriculture and silviculture may be grouped as follows:
 
Byproducts, wastes:
• Plant culture (cereals straw, corn-cob )
• Animal production (slurry, manure)
• Horticulture (fruit-tree and vine cut-offs)
• Food industry (food procession byproducts
• Forestry (logging residue)
• Primary timber industry (sawdust, chip)
 
Raw material produced for energetic purposes:
• Energetic purpose plantations of woody crops and herbaceous plants
• Bio-diesel raw materials (rape, sunflower)
• Bio-ethanol raw materials (cereals, corn, sugar beet, potato)
 
The energy utilization of biomass is based on a burning process by which thermal energy is released. The process is "carbon dioxide-neutral“ that is during the burning the amount of produced carbon dioxide is only that much which was used by the plant's photosynthesis. Biomass is the fourth most commonly widespread energy source of the world following coal, oil and natural gas. 
 
Characteristics of biomass as energy source:
• the renewal is due to the photosynthesis process
• during photosynthesis, the energy of sunlight is stored in the form of chemical energy in the organic materials of plants
• energy utilization may be realized by not increasing the carbondioxide content of the atmosphere
• helps to protect the mineral resources
• remarkably lower pollutant emission (CO2, CO, SO2) as opposed to fossil energy sources
• reasonably utilizes the lands which are released due to the previous food overproduction
• favourably effects rural development and job creation
 
Utilization of biomass:
• Establishment of biogas power plants (following anaerob fermentation as biogas)
Biogas is produced by the anaerobic digestion of biomass in digestors, under separated conditions. The gas is conducted into and burnt in gas engines which results in the generation of electric and thermal energy.
• Establishment of wood gasification boilers (direct burning)
 The used raw materials may be briquette, cutoffs, chips, or other wood residue. The efficiency of these boilers is far better (90%) than that of the traditional boilers.
 

5. Hydro Power Plants

There are several well-known solutions for the utilization of the energy of water: hydro power plants, run-of-the-river power plants with or without dam, tidal power plants, wave power plants, water mills, pumped storage. 
 
Hydro power plant is a kind of power plant which utilizes the kinetic energy of water. The energy produced from water is a renewing energy source which does not pollute the environment, and does not produce carbon dioxide, or other gases that may evoke greenhouse effect. 
 
 
 
 
The power is most commonly extracted from water by damming a river and using water turbines or electric generators. Then the produced energy is transmitted in the form of electric energy.
The produced  energy depends on the volume of water and on the difference in height between the source and the water's outflow. This height difference is called the head. The amount of potential energy in water is proportional to the head. The utilization of the available head is realized by the application of special penstocks and turbine constructions.
 
The two main equipments of the hydro power plant are the turbine and the generator.
The two basic types of power plants are the high-pressure (or high-fall) plant which utilizes the big height distance, and the low-pressure (or low-fall) run-of-the-river plant which utilizes the kinetic energy of the flowing river.
 
The facility to be established requires a preliminary feasibility study and environmental impact study which need to be consulted with and approved by the authorities.
 
The main factors to be examined when making a feasibility study for a hydroelectric power plant: 
• sound effects (noise, vibration)
• biological aspects
• risk related to utilization
• aesthetic considerations, harmony with the surroundings 
 
Pump storage hydro power plants:
Pump storage hydro power plants actually make for the storage of energy. This method produces electricity to supply high peak demands by moving water between reservoirs at different elevations, releasing water from the higher reservoir to the lower through a water turbine. At times of low electrical demand, excess generation capacity is used to pump water into the higher reservoir. When there is higher demand, water is released back into the lower reservoir through a turbine.
 
Further advantages of hydro power plants:
• 150 years' life expectancy
• The produced power may easily and quickly be regulated, thus continuously applicable in both peak/off-peak periods which stabilizes the electric network supply,
• Independent of weather conditions which means almost 100% availability, as opposed to solar and wind energy utilization,
• Clean, stable and environment-friendly energy source,
• Ensures high energy efficiency,
• Low operational and maintenance costs.
 
Our company undertakes the following services related to hydro power plant establishment:
• complete electric design
• Professional consultancy
 

6. Building Electricity

Design and implementation of the electrical system of public institutions, municipalities, industrial sheds, residential houses which scope includes:
• electric shock protection plan
• plug network plan
• design of the lighting and the lighting network
• cable trays plan
• overall technical documentation
• technical supervision

• complete implementation

7. LV/MV/HV networks

 

• Design and implementation of LV/MV/HV earth cable and airline networks
• Design and implementation of MV/LV transformer stations, distributing- and switchgears
• Design of newly-established public and area lighting equipments and networks
• Re-design and modernization of already existing public lighting equipments according to energy rationalization principles
• Establishment of substructures of data transmission networks

• Feasibility study, professional consultancy, coordination related to the above scope

8. Public Lighting Update

Taking into account the continuous rise in the electric energy prices, an environmental-conscious municipality should pay attention to its public-lighting, and its energy consumption and operation..

 
The public lighting system of settlements frequently incorporates out of date and energy-wasting elements, although nowadays several technical opportunities offer solutions for the modernization of these factors, among them:
  • LED lamp units
  • Electrical ballast to compact and high-pressure sodium lamp units
  • Induction lamp units
  • Voltage control

Our company undertakes the technical supervision of public lighting networks and equipments, and the preparation of feasibility study for the modernization.

Our scope of services also includes the design, implementation, operation, and coordination of the financing of these modernization projects.

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