Issue 4/1996

Clean spaces in pharmaceutical industry

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SPÁČIL J.186 - 190
GEA delivery system of clean spaces

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POLÍVKA I.191 - 192
Cool steam generator

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PŘÍHODA Z.193 - 194
Direct gas-fired heating and ventilating units from the view point of working environment

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Direct gas-fired heating and ventilating units with mixing of waste gases and fresh air need low investments and have low operational costs. The paper deals with hygienic problems ari­sing from CO, CO2 and NOx intake to the working and occupational environment. Safe con­centration limits of harmful substances with respect to European standards are given as well as the specification of recommended and non-recommended applications.
MATHAUSEROVÁ195 - 197
Advantages and disadvantages of copper piping

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The paper deals with merits and drawbacks of copper piping applications. Basic characteristics of copper pipes are given and on their basis the usability of copper piping is discussed.
BAŠTA J.198 - 201
Energy audit using ET-curve (Step by step method - part No. III)

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The paper follows up the prior parts Energy saving in buildings (VVI 3/95) and How to determine the ENCON potential (VVI 2/96) of the series dealing with step by step method in energy audit of buildings.
DAHLSVEEN T., BÁRTA L., HIRŠ J.207 - 208
A comparison of NOx and CO emissions generated by burning of solid, Iiquid and gas fuels

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The study presents data about NOx and CO emissions generated by burning of various fuels in boilers of different capacity, age, technical order; in boilers for heating and for diffe­rent technologies. The results obtained from measurements have a large dispersion. ft is shown that emission Iimits valid in Slovakia are often exceeded there. Although the presen­ted selection of boilers is not entirely representative, the study comes to the right conclusion that the most environmentally friendly way of power and heat generation is gas fuel burning.
HORBAJ P.209 - 212
Control systems for ventilating and air-conditioning units

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CHROBÁK P.214 - 216
Sorption-compression heat pump with water-ammonia

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The paper deals with a heat pump which combines advantages of both the sorption and compression systems. The resulting device is smaller than a sorption-based one and has better heating COP than a compression system under equal conditions. Although the Altenkirch cycle was introduced in 1913, the number of devices based on this principle is stilI very low all over the world. The paper describes basic features of the cycle. Attainable values of heating COP for the mentioned heat pump are presented.
ZLATAREVA V., BROŽ K.217 - 219
Adaptive control of centrifugal pumps operation

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Operational conditions of a pump system are investigated with respect to the pump and piping characteristics. Also the start and run-out of engine-pump set adaptively controlled by frequency converter are observed. The adaptive control of operation is demonstrated on the example of cyclic tuming-on of a pump.
BLÁHA J.220 - 224
Ventilation, heating and cooling with decentralised roof units

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BOHUSLAV P.226 - 228
The comfort of service water warming in small reservoirs

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neautorizováno229 - 230
Utilisation of maximum ventilation capacity for heat recovery

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neautorizováno231 - 232
How does an up-to-date roof fan look?

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PŘÍHODA Z.233 - 233
Air-conditioning units JKL from JANKA company

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neautorizováno234 - 234
A new series of NOVA QuickLlNE air-conditioning unit

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FIALA B.235 - 238
Ventilating units with heat recovery

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neautorizováno239 - 241
Control of central heating in small and medium-sized buildings

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TRČKA J.242 - 242