Nikola Pokorný

Czech Technical University in Prague | ČVUT · University Centre of Energy Efficient Buildings

In this paper, a novel concept of an atmospheric water generator (AWG) based on desiccant coated heat exchangers (DCHEs) is presented. Two silica gel coated heat exchangers (SGCHEs) and two zeolite coated heat exchangers (ZCHEs) were prepared by coating a desiccant material on the surface of a conventional air-to-water fin-tube heat exchanger. An e...

To offer an alternative way of supplying potable water to people in desert climatic conditions, a prototype of a mobile autonomous atmospheric water generator was designed, constructed, and experimentally investigated. The dimensions of the prototype are 1 × 1.4 × 1 m. To ensure the efficient water extraction from the atmospheric vapour in the dese...

Photovoltaic–thermal collector generates electrical and thermal energy simultaneously from the same area. In this paper performance analysis of a potentially very promising application of a glazed photovoltaic–thermal collector for domestic hot water preparation in multifamily building is presented. Solar system in multifamily building can be insta...

Testing of two facade modules under outdoor climatic conditions of Central Europe has been performed for more than two years. The paper analyses the results of long-term monitoring and shows potential benefits of prismatic glazing and photovoltaic-thermal (PVT) collectors integrated into one component. The prismatic glazing reflects beam radiation...

The paper deals with performance analysis of potential application of glazed photovoltaic-thermal collector for domestic hot water preparation for multifamily building in European climatic conditions. Two different solutions are studied, glazed photovoltaic-thermal collectors integrated in the building envelope and glazed photovoltaic-thermal colle...

Unglazed photovoltaic-thermal (PVT) collectors for combined usable heat and electricity production are still expanding on the market. Besides the summer heat production and whole year electricity production the unglazed PVT collectors can be used also for night cooling (sky radiation and wind convection heat exchange). Different unglazed PVT collec...

The paper describes possibilities of using computer simulation in the TRNSYS environment for development and optimization of solar system with heat pump and its main components: heat pump, combined heat storage tank and photovoltaic-thermal hybrid solar collector. In addition to the standard component size optimization (heat pump capacity, storage...

The article deals with the testing of solar collectors and application of mathematical models in practice. Solar collectors can not only be tested in laboratory conditions in indoor and outdoor environment, determining the basic parameters necessary for the design of solar systems, but also during operation of the actual installation of a particula...

Development of a new concept of glazed PVT collector based on temperature resistant polysiloxane encapsulation material is presented together with the results from experimental testing and modelling. Performance and economic analysis in 4 different European climates has been done to derive the competitive price of the PVT collector concepts with ma...