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Archiv článků od 31.10.2011 do 20.7.2012

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20.7.2012
Ing. Helena Wierzbická

The paper is dealing with new ways of handling with household waste – pneumatic pipeline systems. There are introduced different kinds of pneumatic pipeline systems and their main advantages and disadvantages are mentioned. Next part is focused on a vacuum piping system, because this system is the most popular for handling with household waste. This system is described in details. The last chapter is interested in design of vacuum piping systems. There are presented main problems of design, assumptions and possibility of solution.

25.6.2012
Ing. Karel Mayer, Ing. Martin Pexa, Ph.D.

Maintenance system based on rules of TPM (total productive maintenance) depends on phases of maintenance. Elementary task of well TPM system setted, is maximal allimination of unscheduled equipment shutdown which are caused by logistic and technologic downtime, but at firs downtimes caused by unplanned maintenance. This kind of maintenance mean reduction of production capacity, and advent to insufficient attention by prevention.. Interval of diagnostic quantity measurment, is part of predictiv maintenance which helps with plannig of preventive intervention and eliminated cause failure before shutdown. In order to check the operating parameters it is possible to use vibrodiagnostics, tribodiagnostics, termodiagnostics, non-destructive testing methods and others. It's difficult to choose the right moment to implement maintenance inspection in order to exploit the whole equipment life time and reduced risk of breakdown failure. The fundamental rules for determining the maintenance measurement interval in the diagnostic management system has not been established. Therefore, the emphasis is on determining the interval for measuring of the implementation of periodic data collection, which is more often used than the on-line diagnostic systems for secondary production techniques and technologies with a parallel backup. Results in Johnson Controls manufactury showes, that with technical diagnostic system and with measurement in flexible interval is possible to achieve savings over 2 mil. All this during continuos production of key technology without possibility to do major maintenance in weekly production capacity. TPM system settings from basic level activities to advanced diagnostic methods helps to run equipment in optimal mode whith minimal divergances of cutted piecies outputs, Undeniable contribution to maintenance is also a fact that by making a service action with the deployment of dynamic range measurements, it can even closer determine real life time of bearing and it is possible to use of the maximum potential production of equipment.

podlahové vytápění
14.5.2012
prof. Ing. Dušan Petráš, PhD., Ing. Jozef Bugáň

Nowadays there is emphasis on energy savings and utilization of renewable energy sources. Therefore, proper selection and design of the heating / cooling system, which should be also able to provide favourable condition of the thermal environment – thermal comfort, is very important. Warm water floor heating is a progressive way of heating, which decreases operation costs on one hand and creates ideal temperature distribution on the other hand.
Decreasing of energy costs leads to increasing interest in systems with better efficiency and thermal comfort. Utilizing of renewable energy sources along with installation of low temperature heating systems results in decreased primary energy consumption and leads to lower operation costs.
In this article experience with application of the new European standard (EN 1264, 2009) for calculation and design of warm water floor heating is presented. The calculation has been carried out for a reference room in a family house, by means of software with application of floor systems from different manufacturers.

denní osvětlení
16.4.2012
Ing. Jiří Slezák

Measurement of natural lighting should be performed in a dark surrounding terrain. In light terrain (landscape covered with snow) only for completion. With regard to the brightness of the sky, its stability and colour of sky, it should be performed at the time around noon. It shouldn't rain or be fog. Disadvantage is requirement of uniformly overcast sky, because it happens only few times a year.

26.3.2012
Ing. Stanislav Števo, PhD., Bc. Marek Pažitný

The article presents two different fire alarm systems for detection in intelligent building. It compares the "traditional" smoke detectors and modern suction unit. Classical design is more advantageous ina way of cost, energy performance and difficulty of installation. Advantage of the suction unit is a very high sensitivity and rapid fire detection.

19.3.2012
Ing. Milan Bechyně, redakce TZB-info

The amount of volume coefficient depends on elevation of location of gas consumption and the temperature of gas flowing through the gasometer. In this paper we describe the procedure by which you can check that the coefficient of volume on the invoice is correct. The coefficient is one of the factors that affect your cost of gas.

energetika paliva plyn pelety
19.3.2012
Ing. Bronislav Bechník, Ph.D.

At present, nobody knows how the energy future will look like. What is certain is that fossil resources can be depleted in the horizon of decades. Proven reserves of uranium – if the power consumption should be replaced by current reactors – would last for only a few years. There are only three promising energy technologies: nuclear fusion, fast breeder reactors with closed fuel cycle and renewable energy sources, along with energy efficiency. While commissioning of the first fusion power plant is expected the earliest by 2040, and demonstration plants with so-called generation IV reactors in 2030, renewable energy sources are already massively installed at present. Construction of nuclear power plant is always more expensive and takes more time than originally planned. Situation of renewables and especially photovoltaic is the reverse – they are built faster and the prices are lower than anyone imagined.

5.3.2012
Ing. Renata Straková, Ing. Josef Knob

Regular inspection is focused on boilers and smoke flue, its accessories, security and regulation. The article presents the second example of inspection of an old thermal system with modern atmospheric gas boiler in a house with new windows and thermoinsulation of the facade.

27.2.2012
Ing. Renata Straková, Ing. Josef Knob

Regular inspection is focused on boilers and smoke flue, its accessories, security and regulation. The article presents an example of inspection of the thermal system with older atmospheric gas boiler in a house without insulation. Technical details of the revision are completed with final report as a result of the inspection .

Chris Huhne na konferenci RenewableUK
13.2.2012
Chris Huhne

Secretary of State for Energy and Climate Change, Chris Huhne, proclaimed: "Renewable energy technologies will deliver a third industrial revolution." He criticised "faultfinders and curmudgeons who hold forth on the impossibility of renewables – the unholy alliance of climate sceptics and armchair engineers who are selling Britain’s ingenuity short."

30.1.2012
Ing. Stanislav Števo, PhD., Bc. Zoltán Stermenszky

The experiment aims to evaluate the suitability of algorithms to simulate the lighting in the ESP-r and to compare the energy consumption "classical" and "intelligent" lighting.

30.1.2012
Ing. Renata Straková, Ing. Josef Knob

Regular inspection is focused to the boiler, smoke flue and accessories condition, its security and regulation. In addition to the technical condition and maintenance, the documentation, operating instructions, manuals and other documents are under inspection. It quantifies the overall boiler efficiency of measurement results, sets reference respectively minimum boiler efficiency and suggests possible actions.

16.1.2012
František Jandura, Elektrotechnický zkušební ústav, s.p.

At present, we encounter increasingly the task to use light-emitting diodes (LEDs) for illuminating industrial environments, public places, the automotive industry and households. In connection with this, there are questions about replacement of classic light bulbs by LED tubes and the idea that the exchange can handle every ordinary user. but there are some risks in terms of product safety. This paper deals with it.

13.1.2012
Ing. Petr Bohuslávek, redakce

On Wednesday, January 11th, the public had the opportunity to attend a seminar of Václav Klaus: Zero energy buildings - an ingenious design, or pointless EU regulation? In this paper you can listen to it again. Speakers were Václav Klaus, Pavel Gebauer (MIT), Ivo Strejček (MEP), Karel Kabele (Czech Technical University) and Lukáš Petřík (Parliamentary news editor).

Klaus and certainly anothers see the concept of (almost) zero energy building as a chimera, a concept that someone created and prescribed by regulation. Fortunately, we know that is not entirely without support in practice. Unfortunately at the seminar, for the ears of the President, or others, it was not clearly said that the design and realisation of efficient buildings is under way, and without regard to European regulations and time ultimatums. Many architects and designers consider it absolutely for granted, and design it of their own volition and on their own beliefs. If we leave aside the fact that the emergence of the directive was the political decision, which is needed to cope, we can build efficient buildings.

28.11.2011
Ing. Melichar Kopas, doc. Ing. Alena Pauliková, PhD.

Lifts (or elevators) are transport machines designed for vertical transport of persons and material in buildings. Taking into consideration the global systemisation of transport and handling machinery, lifts are belonging to the category of hoisting machines that are creating a wider sub-group of the whole system of transport and handling machines. There is known also a special category of electrically driven lifts. It is the category of lifts equipped by a chain, which is acting as tensile means instead of the steel wire ropes. This type of lift is equipped with platforms or cabs attached to a pair of continuously moving chains. These chains are running collaterally around the upper and bottom terminal chain wheels. Such lift doesn’t stop at each floor, but passengers are entering and getting out while a lift is moving. This sort of lift is called popularly “paternoster”. Despite of indisputable technically-operational advantages of the constantly moving lifts, it is necessary to find their era ending because they are considered to be dangerous in a majority of the EU-member countries. The “paternosters” are not able to fulfil principal requirements of the universal design, i.e. design, which is applicable for all people without limitations.

7.11.2011
Ing. Vladimír Sochor, SEVEn, The Energy Efficiency Center, z.ú.

The development of the project on Energy Performance Contracting is very significant even without any state support till recent time. Last year we can see finaly some support. Ministry of Environment has supported EPC in general by the project in programme of environmental education and promotion. Also Ministry of Industry and Trade endeavours to support first phase of EPC project preparation to select buildings suitable to apply EPC from programme EFEKT from 2012. The methodology for the using of the EPC in the state buildings will be prepared by the end of 2011. By the end of this year several moreover several new tenders will be announced in public sector.

31.10.2011
prof. Ing. Jan Tywoniak, CSc., ČVUT Praha, pracoviště UCEEB

This paper deals with changes in the newly revised technical standard for building thermal performance in terms of ventilation and distribution of air in the building. This paper describes the formulation of requirements, when it is necesary to guarantee a quality of indoor environment and also minimize the energy consumption of ventilation. Attention is also paid to disseminating of air into leaks in the facade or roof.


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