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Archiv článků od 29.7.2013 do 14.4.2014

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Filtrace s drenážním systémem Triton
14.4.2014
Ing. Renata Biela, Ph.D., Vysoké učení technické v Brně, Fakulta stavební, Ústav vodního hospodářství obcí

The paper describes the construction of a drainage system Triton and gives examples of its use in water treatment in the Czech Republic. In the world the system is used for over 10 years, but in our country since 2010. The first use of system Triton was at the water treatment plant Štítná nad Vláří, the other is at the water treatment plant Kroměříž.

7.4.2014
Ing. Jan Hurta, Ing. Martin Chlebek, Ing. Petr Koudelka

The Optical fiber DTS (Distribution Temperature Systems) are unique distributed temperature systems using optical fiber as a sensor. For their function they use nonlinear effect in optical fiber (Raman nonlinear effect, Brillouin nonlinear effect). In its activities using the nonlinear effect in optical fibers (Raman nonlinear phenomenon Brillouin nonlinear effect).
The advantages of such a sensory system consisting of immunity to electromagnetic radiation are small, they can be safely used in flammable and explosive environments and can be easily installed.
Fiber-optic DTS can therefore be advantageously used in such environments and processes where the threat to human health or adverse frequent access. Such environments include sewer networks and associated facilities.
This article deals with the possibilities of using DTS optovláknového for locating illegal discharge of waste water into storm drains.

Protiproudý výměník tepla pro předehřev studené vody ve sprchovém koutu. Zdroj: www.sakal-ovt.cz
24.2.2014
Christopher Seybold, Absolvent a Marten F. Brunk, Univ.-Prof. Dr.-Ing. Vedoucí katedry, RWTH Univerzita Aachen Katedra konstrukce a technických zařízení budov Aachen, Německo

About 5% of the total delivered energy consumption in Germany is used for water heating. Referring to buildings, the percentage of the delivered energy consumption for domestic hot water is about 11%. Due to continuous efforts to reduce the heating demand of buildings the percentage of energy used for hot water supply will increase decisively during the upcoming years. This tremendous amount of energy in the waste water is usually discharged unused in the sewage system. In order to achieve the European objectives of climate protection waste water heat recovery provides an enormous and for the most part unexploited potential to develop resource-efficient heating devices in buildings.

27.1.2014
Bc. Eliška Kudrnová, Ing. Petr Hluštík, Ph.D.

In the last years, we indicated progress in use of alternative methods for drainage. Thanks to information from abroad we started designing vacuum and pressure methods of drainage instead gravity ones. The main content of this script is especially to point out deficiencies of nowadays used alternative methods for drainage which we can defuse. Another important part is also the design of suitable technical indicators describing these drainages.

13.1.2014
Bc. Karolína Škařupová, doc. Ing. Jaroslav Raclavský, Ph.D.

Field of study trenchless technology is historically one of the newest building industries. Selection of a suitable methods rehabilitation of the sewer network these technologies must be based on perfect knowledge the technical and operational network conditions, monitored by the operator. For this reason it is necessary to first make categorization of damages in the pipe and then may select trenchless technology suitable for the case. It is advisable to connect the draft environmental assessment technologies and the impact of wastewater on the condition and service life the sewer network.

toilet sign
16.12.2013
Petr Řezníček, šéfredaktor, Wolters Kluwer ČR, a. s.

Standard CSN 73 4108 Sanitary facilities and changing rooms from February 2013 applies to renewals and enhancements and changes in use of buildings; does not apply to equipment in residential buildings (see CSN 73 4301), a medical and treatment plants and for designing special locker, which, due to operation require special solutions.

Fotovoltaické panely
16.12.2013
Ing. Petr Wolf, prof. Ing. Vítězslav Benda CSc.

This article describes a photovoltaic generator used for water heating and compares it with the well known solar thermal system. Photovoltaic modules can be connected to the load both directly or via a regulator that tracks the maximal power point of the modules. Measurements and simulations in meteorological conditions of Czech Republic were done to set the energy loss for a system without the regulator. It was found that without the regulator the system can deliver maximally 77 % of energy. To achieve high efficiency of the system, maximal power point tracking has to be used.

2.12.2013
Ing. Zdeněk Žabička

In all my articles and lectures in recent years I highlight the problems of corrosion in systems of water supply made ​​of metal. Theoretically, we all could have idea of types of corrosion in metallic materials. In the design of water supply a lot of designers overlook this knowledge as fabrications of "pundits". Their notice about inappropriate use of galvanized steel pipe for water system aren't taken seriously.

analýza příčin problémů uživatelů bezbariérových veřejných toalet
11.11.2013
Ing. Petr Šika, Západočeská univerzita v Plzni, Fakulta zdravotnických studií, Katedra teoretických oborů

The aim of the research is to analyze the causes of problems for wheelchair users of public toilets. The result is an overview of research gaps disposition, construction, ergonomic, anthropometric, design and operational character.

21.10.2013
Mgr. Radomír Dohnal

In order to achieve carbon neutral office building is designed and recycling of waste water from the normal operation of the administrative center. Much of the processing of waste water is placed on the roof.

Fotovoltaické panely na střeše
14.10.2013
Ing. Bronislav Bechník, Ph.D.

Solar radiation can be utilised in two basic ways. You can either gain heat from solar thermal collectors or electricity in photovoltaic panels. So far, heating of water by photovoltaics was too expensive to compete with conventional solar thermal collectors.
Weight , durability , and currently even the price of solar thermal collectors is comparable with commercially available photovoltaic modules.
Annual energy yield per unit area is approximately twice in the solar thermal collectors compared to the highest quality photovoltaic modules with cells made ​​of monocrystalline silicon, due to the higher efficiency.
In the summer the photovoltaic modules are better when the working fluid is heated to temperatures above 100 °C. In the winter the breaking point is about 40 °C. The advantage of photovoltaics is the absence of heat transfer fluid and easier transfer of energy produced to the point of use. Electricity can also be used more versatile than heat.
If the investment cost of a complete solution of heating water by electricity from photovoltaic panels, either directly or using a heat pump, is lower than the investment cost of the solar thermal system, the PV water heating can be considered as effective utilization of electricity from photovoltaic plants. Such a solution could then be included as an alternative to any grant support for solar water heating.

dešťové odpadní potrubí
23.9.2013
Ing. Jakub Vrána, Ph.D., Ing. Vladimír Valenta

In the cold season flows rain drain pipe cold rainwater posed pulls cold outside air. It is necessary due to heat loss and to prevent condensation on the outer surface of pipes, rainwater pipes led inside thermally insulate buildings?

požární vodovod
9.9.2013
Ing. Vladimír Stehlík, výrobní náměstek Vodovody a kanalizace Mladá Boleslav, a. s.

But if there is a contention for fire brigades with the technical possibilities of public water supply, it can occur unsolvable problem. The aim of the article is to provoke discussion, to help find viable solutions and the conditions for fire building security.

instalatér opravující vodovod
2.9.2013
Ing. Jiří Frýba

Less experienced HVAC field service managers sometimes tend to have difficulties in identifying the causes of technical problems that common practice brings. The table in the article can be used both ways – to find the cause of the problem or use it as a basis for a maintenance plan designed to prevent the faults and equipment failures.

voda z kohoutku
26.8.2013
Ing. Tomáš Kučera, Ph.D., VUT FAST Brno, Ústav vodního hospodářství obcí

This paper deals with the possibilities of the use of membrane filtration in water treatment process intensification. The introduction is presented to the emergence and development of these technologies, their gradual expansion and application. Following are descriptions of specific features and the possibility of using microfiltration and ultrafiltration membrane modules. Includes a description of the materials used for the production of membranes, their advantages and disadvantages are also discussed procedures for testing the integrity of membranes. Attention is paid to effect separation of individual types of pollution and usage of these technologies in the country.

12.8.2013
RNDr. Pavel Punčochář, CSc., CSc.,, vrchní ředitel Sekce vodního hospodářství Ministerstva zemědělství

The discussion in the last 2-3 years shows that financial recovery plans aren't generally prepared thoroughly. Application of theoretical percentages annual needs ("depreciation") of the value of infrastructure property is usually misleading and leads to biased opinions.

29.7.2013
Ing. Jakub Vrána, Ph.D., Ústav TZB, Fakulta stavební VUT v Brně

The purpose of CSN 73 6660 was to introduce a national standard for water supply in buildings in accordance with European standards (especially DIN EN 806-1 to 5 and EN 1717) and make the residual norm to these European standards, which would include requirements that do not European standards developed in sufficient detail or at all.


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