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HIDROENERGA d.o.o.

Mechanical hydro and thermodynamic systems design and supervision


About HidroEnerga

HIDROENERGA from Osijek, founded in 2009, is the company with eleven-year experience in the design of mechanical hydro and thermodynamic systems and facilities.

Hidroenerga offers the development of optimal mechanical, both technical and technological design documentation, as well as the expert supervision during construction, applying modern technologies and recent knowledge. We offer services based on the in-company development, using computer systems, complete programme packages and demanding calculating models developed in the company.

Hidroenerga d.o.o. Osijek

Mechanical Design and Expert Supervision

Mechanical engineering and expert supervision of the construction of mechanical facilities and installations are successfully consolidated with the services of other construction branches into a joint quality product. Generally, we are experts in the following technical areas:

  • Preparing and processing of drinking / technological water, wastewater percolation machines, pumps, filters, water reservoirs, stations for pressure raising, irrigation, pools, wells;
  • Heating, ventilation, conditioning, refrigeration systems, boiler-rooms, heat stations;
  • Renewable energy sources (heating pumps, solar heating and cooling);
  • Inner water supply-lines, sewage system, hot sanitary water, fire protection;
  • Distributive gas pipelines, gas pipelines in houses and industrial objects, measuring- reducing stations, LPG reservoirs, medical gases.

In the design of mechanical facilities and installations the company is guided by the following business philosophy:

  • project quality;
  • multidisciplinarity, compatibility and coordination with other construction designers;
  • optimum construction time and respect of specified deadlines;
  • energetic efficiency consistent with the environment protection, with the purpose of complete adjustment to the investor's needs.

In terms of technical issues, prior to the development of design documentation, we perform detailed technical-economic analysis and make comparisons of possible technical-technological solutions. This gives an investor insight into the necessary parameters, borderline conditions and rough estimates of investment costs and usage costs for the projected lifetime of the building.



References of mechanical facilities and installations



  • A big number of facilities, heating and cooling installations, ventilation and air - conditioning of different technological demands (houses, business buildings and offices, churches, factory and clinical objects, farms, labs, etc...)
  • Renewable energy sources for different object types (heating pumps, solar heating and cooling);
  • Facilities and installations of natural gas and liquefied petroleum gas, stations for reception and storage of LPG, measuring - regulating stations, etc.
  • Inner water supply-lines and sewage systems for various types of objects.
  • A big number of water wells, filter stations and water reservoirs - water pumpage and delivery, technology, preparation and processing of drinking water.
  • Equipment for percolation of wastewater - treatment technology, mechanical-technological equipment and mounting.
  • Stations for pressure raising on water supply systems.
  • A great number of wastewater pump stations.
  • Pump stations with irrigation system.
  • Various levels of infrastructure of harbours and ports.

Technical – economic analyses

In advanced economies, it is accustomed to submit all investments, including the smallest ones, to a detailed technical-economic analysis in order to keep an investor from implementation of inefficient and bad technical-technological solutions.

This reveals great responsiveness of the project designer to gain, through thorough analyses, the technical-economic (and ecological) indicators of possible solutions, which will serve as a guide for investors with possible self-confidence and starting belief in their own vision.

In terms of technical issues, prior to the development of design documentation, we perform detailed technical-economic analysis and make comparisons of possible technical-technological solutions. This gives the investor insight into the necessary parameters, borderline conditions and rough estimates of investment costs and usage costs for the projected lifetime of the building.

Company Hidroenerga is at your service for doing the detailed technical-economic analysis in their field of work. It thereby varies possible technical solutions from the aspect of:

  • ecological acceptability
  • technical use
  • energetic efficiency
  • possible partial or complete replacement of classical energy sources by renewable sources (heating pumps, solar heating and cooling, heat exchanger earth - air, etc.)
  • investments price

The following chapters are thereby included:

  • rough estimate of possible technical-technological solutions
  • the study of heat protection, hydraulic analysis, etc., depending on the type of analysis
  • the COST-BENEFIT analysis, i.e. calculation of costs of investment and system functioning
  • the PRO-CONTRA analysis, i.e. evaluation of pros and cons
  • conclusion about the most favourable technical-economic solution based on the previous analysis

Expert Articles

The company manager Krešimir Pećar publishes articles related to the company interests on regular basis.

  • Computer programming of the hydraulic model of middle pressure gas network, 6th natural gas conference, Osijek (2008)
  • Heat pumps with the underground heat probe – discrepancy between reality and dream, EGE 1/09, Zagreb (2009)
  • Introduction of the new system of legislative technical regulations in the area of construction in Croatia, EGE 3/07, Zagreb (2007)
  • The possibilities of the applications of pumps with the submerged impeller in the large irrigation systems, EGE 2/07, Zagreb (2007)
  • Computer programming of the hydraulic model of hot water network, EGE 1/07, Zagreb (2007)
  • Electric heating of the old sacral objects – alternative or thoughtlessness, EGE 1/06, Zagreb (2006)
  • Efficient clogging protection of long pressure wastewater pipelines, EGE 5/05, Zagreb (2005)
  • Underfloor heating of the old sacral objects, EGE 4/05, Zagreb (2005)
  • The analysis of possible technical solutions of the long pressure wastewater pipelines (part II), EGE 4/05, Zagreb (2005)
  • The analysis of possible technical solutions of the long pressure wastewater pipelines (part I), EGE 2/05, Zagreb (2005)

VBA MODULES FOR CALCULATIONS AND DRAWING IN EXCEL / AutoCAD SURROUNDINGS



Every day we witness the implementation of information technology in all domains of life. Consequently the engineering in general has flourished, because different complicated calculations have taken less time due to the use of modern computers and suitable software. Moreover, the possibility of making mistakes caused by tiresome typing at the pocket computer keyboard has almost completely disappeared.

Therefore it is advisable to think about the development of one's own mathematical models for dealing with the most complex structures of engineered technical calculations, using VBA (or some other programme language) available at every computer as a platform based on EXCEL or other CAD programmes.

Thanks to the knowledge gained through long endeavours and wish to perfect the technological process of engineering design and to optimise the given facilities, we have created a great number of automated computer packages at VBA platforms, which include EXCEL calculations connected to the AutoCAD structure. All these models are successfully used to accelerate the work considerably, to increase the accuracy, and to ensure the clarity of calculated data.

Also, we can offer design of programme packages adjusted to your particular business needs, as well as different professional calculations, computer simulations, mathematical models and drawings (installations, steel structures, etc.), such as:

  • Heat effect of radiators for non-standard conditions
  • Calculation of expansion tank of heating system with the power 350 kW according to DIN 4807
  • Calculations of boiler-houses with the dimensioning of energy balance, equipment, ventilation and energy-generating product consumption
  • Calculations of systems of letting off flue gases (funnels) according to DIN 4705
  • Hydraulic impact in pressured pipes
  • Calculation of compressor station
  • Hydraulic calculations of networks of heating, cooling, gas, drinking water and wastewater, air and other media
  • Other specialized calculations on demand

Automatising within AutoCAD application

It is often the case that some actions are repeated for hours and days during the project documentation design. If such actions have certain rules and repeat regularly, it is even more possible for them to become automatic.

What would having a specialised supplement designed to turn the long-lasting repeating into a simple, accurate, and quick solution mean?

In the sense of time, it would mean the significant time saving, especially if such a solution is applicable in other (similar) situations. Financially it would be irrelevant, meaning that a small investment would bring great time savings.

A programme tool which makes this possible is VBA (Visual Basic for Application). There are other solutions as well, such as .net, lisp and similar.

HIDROENERGA d.o.o. Osijek is the answer to the demands of your business.

Contact

HIDROENERGA d.o.o. Osijek manager: Krešimir Pećar, B. Sc. Mech. Eng. REGISTRATION NUMBER: 1102869 GIRO ACCOUNT: 2360000-1102067081, Zagrebačka banka d.d. Address: Vijenac I. Meštrovića 54 31000 Osijek Hrvatska (Croatia) Tel / Fax: +385 31 778 017 Mobile: +385 (0)99 550 56 66 E-mail address: info@hidroenerga.hr Skype: kresimir_p
Krešimir Pećar

Hidroenerga d.o.o. Krešimir Pećar, dipl. ing. stroj.