Issue 3/1994

Some knowledge concernig fuel cells

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PETRLÍK,J.2 - 6
Present trends in heating and air conditioning of the Czech rolling-stock

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Specificities of air conditioning of railway vehicles determinated for high running speeds are presented there. Modernization of heating, venti/ating and automatic temperature control of loca! and suburban traffic vehicles is discussed there. Heat conditions in the engine drive's cabin as a constituent part of safety of operation are mentioned there too.
VONDRÁK O.7 - 10
Noise reduction (Part No.1-)

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NOVÝ,R.11 - 12
Control of difficile air conditioning and heating equipments

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The possibility to use an equipment with the controlled atenuation of temperature oscillations for automatic control of an air conditioning system with close temperature tolerances and for making the operation of thermaly inertial heating systems more economical is presented in the paper there. Intentional introducing of pulses into automatic control systems allows to bridge over difficulties fetched along by dead time of the controlled system.
HEMZAL K.13 - 18
Air conditioning of operating rooms

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KADLEC M.19 - 22
Inside water piping - preliminary dimensioning - (Part No. 1)

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ONDROUŠEK K.25 - 28
Energy savings during operation of reconstructed air conditioning equipments in Investa a.s. buildings

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NOVOTNÝ R.29 - 33
Tests of the EKVITA hot water pump

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HORÁK,V.41 - 42
Filtration of harmful substances from air by means of solid sorbents

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BRYCH,J.45 - 46
Return on investment - energy savings

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VAJSAR,J.47 - 51
Fire dampers in HVAC equipments

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HAVEL,M.52 - 53
Attestation of products qualities and involved problems

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The paper deals with problems concerning attestation of products' qualities and testing of products from the point of view of the testing laboratory personnel. Indication of the essential requisites and law relations is very important for customersl; protection.
KUNZL,Z.57 - 58
Heat pumps and unit boiler heating plants have great advantages for environment

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PTÁČEK R.60 - 61