Nejnavštěvovanější odborný web
pro stavebnictví a technická zařízení budov
estav.tvnový videoportál
Elektrotechnika
Archiv článků od 23.11.2015 do 29.8.2016

Archiv recenzovaných článků

zpět na aktuální články

29.8.2016
Ing. Zdeněk Hošek, Ph.D., Ministerstvo vnitra - generální ředitelství Hasičského záchranného sboru ČR

The annual total losses caused by fires in the Czech Republic (direct and indirect) are not negligible. The total amount of these damages is to a large extent also involved in fires caused by the operation of electrical wiring and equipment. In terms of fire protection in these cases remains a key issue rate of compliance with fire safety requirements in design, construction, and especially in the operation of these facilities. Currently, in addition to the system of Czech technical standards implemented a lot of new European standards which transpose the international requirements for testing, design, operation and maintenance of electrical wiring and equipment, which requires often the direct modification of existing CSN, in those parts which are contrary thereto. This situation logically caused societal need to address this issue in order to protect public interests, and comprehensively, using available European technical documents, specifications and national standards of EU member states, according to the current state of science and technology.

1.8.2016
plk. Ing. Zdeněk Hošek, Ph.D., Ministerstvo vnitra - generální ředitelství Hasičského záchranného sboru ČR

The article is focused on ambivalent features of systems intelligent building management from the obligatory requests on fire safety point of view. It insists that reliable and functional detection is the basic predetermination to effective solution in fire case but it is not sufficient to the total fire protection provision. The complex solution of the problematics involves many further steps and provisions of both, technical and organizational character.

18.7.2016
Michal Randa, redakce

If we want to talk about possibilities of alarm systems integration, we should distinguish wheather we are heading to their further development or is it just a deformation of original idea of their use as technical tools to protect wealth and people.

18.7.2016
prof. Dr. Ing. Karel Pavelka, Fakulta stavební ČVUT, katedra mapování a kartografie

Presented text discusses the use of RPAS (Remotely Piloted Aerial System) in the building industry and heritage preservation. It provides information of various case studies and shows examples. For the purposes of building industry and technological area monitoring multicopter systems are mainly used. They have more complex control, but they can be successfully navigated in very low heights and low speeds around and above the object. Safe handling and ensuring the area after agreement with the owner or facility manager is crucial for their use.

11.7.2016
prof. Dr. Ing. Karel Pavelka, Fakulta stavební ČVUT, katedra mapování a kartografie

Presented text discusses RPAS (Remotely Piloted Aerial System) in terms of history, legislation and its possible use especially in the civil sector. RPAS, often called UAV / UAS or “drones” in slang are a phenomenon of recent years. They present modern and popular technology that has undergone an unprecedented boom thanks to miniaturization of electronics, control and navigation equipment, high-performance battery development as well as individual components now available for affordable prices. Safe manipulation and current limits of applicability are indispensable and must be taken into account.

11.7.2016
Jan Krčmář, Ing. Zbyněk Vala

In late 2014 Photon Energy commissioned a unique solar PV storage project in Australia. Instead of feeding energy into the grid, the 39 kWp / 215 kWh power plant powers a radio broadcast tower. This article explains in detail the set-up of the hybrid PV system, which was designed to prove that renewables can be used for on-site production even for demanding customers. Which technology was used and why? After one year the authors examine production data to evaluate the system’s performance.

11.7.2016
Michal Randa, redakce

If we want to talk about possibilities of alarm systems integration, we should distinguish wheather we are heading to their further development or is it just a deformation of original idea of their use as technical tools to protect wealth and people.

13.6.2016
Ing. Lukáš Velebil, Ing. Richard Zelený, Ing. Jan Včelák, Ph.D., doc. Ing. Petr Kuklík, CSc.

The paper describes a system of FBG (Fiber Bragg Grating) sensors and their integration into the beams of glued laminated timber for continuous monitoring and diagnostics of mechanical stress in building structures. The possibility of gluing the optical fibers into the timber structure and influence on manufacturing process of glued laminated timber on the glued fibers is studied. Laboratory tests including mechanical loading of examined samples were carried out to verify the correct operation of the sensors. Based on the measurement, a timber beam with embedded FBG sensors for the monitoring of the real construction have been manufactured.

23.5.2016
Ing. Jiří Pokorný, Ph.D., MPA, VŠB – TU Ostrava, Katedra bezpečnostního inženýrství, Časopis Vytápění, větrání, instalace

The active fire safety devices, by which are in the contribution meant especially electric fire alarms, stabile fire extinguishing means and devices for smoke and heat removal, are an important part of building security systems. For the proper function of these systems it is necessary to pay attention to the priority how to put into operation the particular device, their coordina tion and interaction between them.
The principles of the prioritizing how to put into the operation the individual active fire safety devices are described on the basis of the reasons for the devices installation and their priority or eventually secondary protection targets. The attention is paid also to the coordina tion of the fire safety means.

16.5.2016
Ing. Michal Lom, doc. Ing. Ondřej Přibyl, Ph.D.

The aim of the article is to provide several concrete solutions and applications of Smart Cities that are already being applied in the world and try to describe their contribution to urban residents. We focus on the first two of the six key areas of Smart City – Smart Government and Smart Transportation.

9.5.2016
Michal Randa, redakce

Each technology equipping today's modern buildings, facilities or campuses, provides a variety of operational data - alarms, status variables and operating parameters, which can effectively help in managing their operations. Therefore it is absolutely logical step to focus them into one unified graphical environment.

2.5.2016
Michal Randa, redakce

Each technology equipping today's modern buildings, facilities or campuses, provides a variety of operational data - alarms, status variables and operating parameters, which can effectively help in managing their operations. Therefore it is absolutely logical step to focus them into one unified graphical environment.

28.3.2016
Ing. Pavel Rybář

Automatic sprinkler systems are used for fighting usually water. Firefighting foam is possible as well. Therefore, there are water or foam-water sprinkler systems. Sprinklers are triggered automatically.

5.3.2016
Ing. Karel Dvořáček

At present, it is establishing the second edition of the standard ČSN 33 2000-7-753: Low-voltage electrical installations – Part 7-753: Requirements for special installations or locations – Heating cables and embedded heating systems, which already includes other requirements associated with this type of heating, generalized for any use.

20.2.2016
Ing. Karel Dvořáček

At present, it is establishing the second edition of the standard ČSN 33 2000-7-753: Low-voltage electrical installations – Part 7-753: Requirements for special installations or locations – Heating cables and embedded heating systems, which already includes other requirements associated with this type of heating, generalized for any use.

8.2.2016
Ing. Michal Lom, doc. Ing. Ondřej Přibyl, Ph.D.

First article from the Smart city series deals with occations for new urban conceptions, defines the Smart City idea and describes it from different points of view.

14.12.2015
Ing. Andrea Nasswettrová, Ph.D., Ing. et Ing. Soňa Křivánková, Ing. Simona Lauerová, Ing. Olga Grossová, Ing. Pavel Šmíra, Ph.D., MBA

The paper presents a methodological procedure and results of acoustic detection of wood-destroying insect larvae in the buildings of the Wallachian Open Air Museum in Rožnov pod Radhoštěm. Using the Acoustic Pack acoustic system, the activity was monitored at 112 positions of wooden trusses of framing on the house of Prlov and Rožnov Town Hall as structures considered for the performance of a preservation measure. Based on the obtained results, the actual status of active infestation of wooden elements was defined with the graphic output of activity and sound records which will be used for designing efficient preservation of the structures.

30.11.2015
Ing. Jan Vidim

The aim of electricity distributor is that customers may be sourced if a constant amount of energy. When properly appliances division into groups according to how they can be turned off, it is possible to reduce the agreed value of the load shedding and save on fixed fees. The regulator load shedding so in the short term applies.

23.11.2015
Ing. Michal Lom

This paper describes the controller functions, types of control units and from which all components can be composed. Next part is about explaining how to program the controllers can take place, what are the types of controlling and communication protocols that are most frequently used for connection to field devices and supervisor. The whole interpretation is conducted through first theoretical introduction followed by practical example. The whole paper is written exclusively on control units, which are used in building automation and belonging to the group DDC (Direct Digital Control) systems. These controllers are most often used to HVAC systems (Heat, Ventilation and Air Condition). The aim of these systems is to achieve thermal comfort in buildings. The whole industry is then called Measurement and Control. Specific application is e.g. controlling of Air handling unit according to pre-defined project.


zpět na aktuální články
 
 
Reklama