Archiv článků od 25.9.2017 do 21.5.2018

zadejte vlastní článek

zpět na aktuální články       1  2  3  4  5  6  7  8  9  10  ...   

Application of Selected Sorbent Materials in Removal of Bromates from Water

21.5.2018 | Ing. Ivana Marko, doc. Ing. Danka Barloková, PhD., prof. Ing. Ján Ilavský, PhD., Slovenská technická univerzita v Bratislave, Stavebná fakulta, Katedra zdravotného a environmentálneho inžinierstva
Bromates (BrO3) are classified as hazard substances that can cause carcinogenic diseases. They belong among the elements that are not commonly found in analysis of the drinking water. Bromates appear as by-product from water disinfection by ozone in the water, that contain the higher concentration of bromine ions (BrO). There are several physical and chemical processes that can be used to reduce the concentration of bromates. Adsorption is one of the most frequently used methods for removal of the hazard substances from the water. It allows the application of various type of sorbent materials for instance: active coal, zeolite, GEH, and the other materials with base of iron hydroxide.
The main aim of this work was to ensure the removal of bromates from the water source Dvorníky (Slovak Republic), with selected sorbent materials: granulate active coal, zeolite, GEH, Bayoxide E33, Read – As, Klinopur – Mn, and activated alumina. The results of the laboratory tests are present in the experimental part.

Determination of membrane expansion vessel size for water heaters

14.5.2018 | Ing. Vladimír Valenta
Water increases its volume when heated in a heater. The increased volume is then discharged through the safety valve into the waste. This leads to water losses. Larger proportional losses occur especially when hot water is not taken during heating.

Protection against contamination of drinking water by return flow

7.5.2018 | Ing. Jakub Vrána, Ph.D., Ústav TZB, Fakulta stavební VUT v Brně
Danger of backflow is underestimated. Water mains operators rely on a reversing valve in a water meter assembly, but this may not be reliable. Here, health risks and deterioration of drinking water quality in backwaters are known.

Solar water heating on the Czech market

30.4.2018 | Bc. Jakub Venzara, ČVUT v Praze, Fakulta strojní, doc. Ing. Tomáš Matuška, Ph.D., Univerzitní centrum energeticky efektivních budov, ČVUT v Praze
The authors describe the economic and technical connections related to the use of thermal solar water heating systems on the Czech market. This includes investment costs, grant titles, operating options, and an estimated lifetime that is roughly twice as high as the economic return.
7 comments, last 03.05.2018 10:31

Framework of the National Environment Program for the period 2018 & 2020

9.4.2018 | Státní fond životního prostředí
This Framework of the National Environment Program is the extension of the National Environment Program document. The Framework introduces priority themes to be supported by the National Environment Program over the next three-year period.

Retrofit in terms of measurement and regulation

26.3.2018 | Ing. Jan Vidim
Measuring and control devices as well as other HVAC systems, run through their lifecycle, at the end of which the system needs to be reconstructed. A key condition for a successful retrofit is to determine the required life of the refurbished equipment.

Requirements for indirectly heated pressure cylinder water heaters

19.2.2018 | Ing. Jakub Vrána, Ph.D., Ústav TZB, Fakulta stavební VUT v Brně
Revised CSN EN 12897 “Water Supply – Indirectly heated pressure (closed) storage water heaters” applies to indirectly heated pressure container heaters up to a volume of 2000 liters usable in internal water conduits at overpressure from 0.05 MPa to 1.0 MPa. The author draws attention to important provisions of the standard that will be reflected in practice.

Pump connection at long-distance water transport

19.2.2018 | Ing. Milan Dermek, doc. Ing. Mikuláš Monoši, PhD., Žilinská univerzita v Žiline, Fakulta bezpečnostného inžinierstva, Žilina, Slovensko
The article deals with the issue of water transport by hose lines to fire. It describes pump connections when transporting water according to required parameters at the intervention site. Compares how the hose line is connected and determines the suitability of its use.

How do rainwater absorption systems look like?

19.2.2018 | Ing. Jan Vacek, ASIO, spol. s r.o.
Rainwater can be captured and used directly. After simple mechanical cleaning it is suitable for irrigation or flushing toilet, cleaning, car wash or laundry. The basic choice is the pumping of rainwater. The article describes the possibilities.
©  adrian_ilie825 - Fotolia.com

Economic assessment of energy saving measures in apartment buildings - HVAC systems

5.2.2018 | Ing. Karel Mrázek
The article deals with the economic assessment of energy saving measures as a further continuation of the topic of reconstruction of HVAC systems in apartment buildings. Selection of economical lifespan for selected elements and functional parts with preventive maintenance costs is provided. Finally, an example of the apartment building evaluation is given.

What requirements have to be met by a family house electrically heated a and what impact should a change in the primary energy conversion factor?

29.1.2018 | prof. Ing. Karel Kabele, CSc., ČVUT v Praze, Univerzitní centrum energeticky efektivních budovtavební, katedra TZB, Ing. Miroslav Urban, Ph.D., ČVUT v Praze, Univerzitní centrum energeticky efektivních budovVUT v Praze, Fakulta stavební, katedra TZB
Family houses with the concept of electric heating by means of an electric boiler or electric direct heating system and the preparation of hot water in an electrically heated tank do not meet the requirement for the energy performance of buildings. The authors analyze the magnitude of the conversion factor and other parameters that would meet ENB requirements.
© M-Rido - Fotolia.com

Documents for the reconstruction of HVAC system in a residential building

22.1.2018 | Ing. Alena Horáková
The first article of the series on energetic reconstruction HVAC systems in residential buildings is focused on the preparation of project with minimum necessary information that should be prior to any commencement reconstruction. In current practice this part is significantly neglected.

Replacing the old atmospheric gas boiler with a new condensing boiler

8.1.2018 | Ing. Josef Hodboď, videoreportáž: Ing. Petr Bohuslávek, redakce
The text and video describe a typical replacement of the old suspended gas boiler in the apartment. The reason for the exchange was not only the effort to save gas but also to protect our health and life, ie to eliminate the risks associated with older boilers with the air supply from the room.
12 comments, last 12.01.2018 18:41

What is the consumption of cold and hot water in the apartment house in Bratislava?

8.1.2018 | Ing. Milan Krafčík, doc. Ing. Jana Peráčková, PhD., Stavebná fakulta, STU Bratislava
The paper presents the results of the experimental measurement of cold and hot water flows in the reconstructed pipeline of a residential building. The measured flows are compared to the calculation values according to STN 73 6655, DIN 1988-300 and the values computed by the calculation program. The results can be applied to the optimization of the design of internal water mains as well as the optimization of the design of the hot water preparation plant and its heat source.
1 comment, 12.01.2018 13:29

Water management systems

18.12.2017 | Ing. Stanislav Frolík, Ph.D., katedra technických zařízení budov, ČVUT v Praze, fakulta stavební
Lecturer of Water Management Systems, Stanislav Frolík, Ph.D., briefly summed up what should be taken into account and what decides on a meaningful solution of waste water utilization, including topical issue of rainwater.

Rainwater management from the viewpoint of landscape architecture

18.12.2017 | Lucie Pančíková, ZO ČSOP Koniklec
Heat has a number of negative health effects. An effective way to respond to the situation is to increase the share of green areas in the city. Green and its presence in the city is essential to make the big cities habitable in the future.

Health safety of drinking water products (current requirements in the Czech Republic)

16.10.2017 | MUDr. František Kožíšek, CSc.
No foreign certificate can be used to verify the product for contact with drinking water in the Czech Republic. A foreign protocol on the leach test is sufficient if it is obvious that it is identical to the test specified in the Decree No. 409/2005 Coll.

Small solar systems for preparation of hot water (PWH) in family houses

9.10.2017 | doc. Ing. Tomáš Matuška, Ph.D., Univerzitní centrum energeticky efektivních budov, ČVUT v Praze
The author provides a basic overview of technical information on the issue of small solar systems suitable for family houses.
1 comment, 14.10.2017 00:10

Utilization of overproduction of electricity from a photovoltaic power plant for heating and hot water production in a production area, part 1.

2.10.2017 | Ing. Petr Bican, Ph.D., Zdeněk Lovicar
The authors compare the measured data on the production and use of electricity produced by the solar photovoltaic power plant with the total electricity consumption in the production area of the company. The second part of the article is based on considerations about the use of overproduction of electricity for heating and hot water preparation and its economy.

Utilization of overproduction of electricity from a photovoltaic power plant for heating and hot water production in a production area, part 1.

25.9.2017 | Ing. Petr Bican, Ph.D., Zdeněk Lovicar
The authors compare the measured data on the production and use of electricity produced by the solar photovoltaic power plant with the total electricity consumption in the production area of the company. The second part of the article is based on considerations about the use of overproduction of electricity for heating and hot water preparation and its economy.
zpět na aktuální články       1  2  3  4  5  6  7  8  9  10  ...   

Témata 2018

Tipy pro projektanty

Partneři - Voda, kanalizace

logo ASIO
logo RAYCHEM
logo WAVIN EKOPLASTIK
logo MEA
logo NICOLL ČR
logo WILO
 
 

Aktuální články na ESTAV.czDPP a Penta založí podnik na výkup pozemků pro stavbu metra DSTRONGER TOGETHER: Fermacell a James Hardie se stávají jednou společnostíVítězný pasivní rodinný dům je promyšlená dřevostavba se skromným vzhledemŘízené větrání: Přísun čerstvého vzduchu jako nezbytnost