Issue 4/2012

Author presents the experimentally acquired dependences of hydraulic behaviour in the field of capillary mats in this article. He deals with dependence between pressure loss of capillary mats and flow rate and all this is in relation to geometrical layout and concurrent-flow hydraulic connection. Simulation of pressure losses for capillary mats will be gestured in his next article.

The author deals with problems of aerodynamic noise sources in the HVAC duct distribution systems namely as to the dimensioning (sizing) the HVAC equipment for acoustically demanding spaces, in his article. He presents the most frequent noise sources and their spectrum of sound pressure levels related to limits resulting from Standard ČSN 73 0526 “Acoustics – Designing in the Branch of Space Acoustics”. The specified noise limits point at the necessity to view noise parameters as the most important factors during the dimensioning the HVAC equipment in broadcasting and TV studios.

The article deals with current modifications in the field of fire protection and discusses a function of thermal insulation. Author clarifies terms such as reaction to fire and fire resistance.

The author, a long standing operation manager of HVAC equipment and other environmental engineering equipment, introduces his personal memory for the preparation and the course of the construction of the Czechoslovak Television Centre in Prague at Kavčí hory during the years 1966 to 1984 with the reference to its specifics, in the first part of his contribution. Concurrently, he states the fundamental HVAC conceptions and then organization and the operation control in the mentioned building. In the next part of the article, he compares the course of the TV Centre construction with new buildings, and he assess the quality of assembly and preparatory works including tests before putting the HVAC equipment in the permanent operation. Further, the author reminds the necessity to increase the effectiveness of the HVAC equipment operation with the intention to reduce the current high energy demands of such systems with the adherence of the convenient inside environment and complying with their possibilities.

The author results from the understanding that the technical development in the physical principles usage and the improvement of possibilities and functions of the HVAC equipment that we noticed within the last twenty years together with change of economical requirements to utilize these systems, brought operators of the abovementioned systems in a quite different situation than was the situation within which they oriented themselves before the year 1990, in the topic of his contribution. The application of the facility management phenomenon, multiple usage of computer technology for controlling and monitoring the operation, as well as changes in the labor market affected the philosophy of the access of all participants involved in the construction of buildings, equipped with the HVAC equipment, say up to providing the subsidiary services to main activities of owners and tenants of objects including the operation of technical equipment in buildings, in a very serious way. Consequently, the content of this contribution is an attempt to formulate the summary of benefits as well as shortcomings of mentioned changes.

Authors substantially complete the ever remaining information space concerning the summarized overview of obligatory acts that are to be obliged to ensure by administrators (managers) of buildings in which reserved technical equipments are situated and operated, in their article. This problem is the subject of discussions and questions, submitted often by operation managers of the technical building administrations and other experts in the area of the facility management profession community, which e.g. in Slovakia is summarily solved by the Decree No. 718/2002 Coll., of the Ministry of Labor, Social Affairs and Family. Authors submit the summarized information of obligatory acts, classified according to types of the reserved building technical equipment with references to valid technical standards and legal documents with applicable and obligatory terms for the execution thereof, in the article.

Author gives a comprehensive report on content of amendment of Energy Performance of Buildings Directive from 2010 which has to be transposed into Czech legislation. Paper focuses also at technical measures leading to almost zero energy buildings and presents actual national and foreign methods of building evaluation.

Radon programme was launched in the 1980s and in this time 3rd decade is realised. The author is the representative of the Czech Ministry of Health with the main task to spread information about the risk of radon and about the possibilities of health protection. There are given topical information about activities of radon programme.

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