Browsing by Author "Dvořák Václav"
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- ItemAdvanced methods of modelling and design of plate heat exchangers(DESTECH PUBLICATIONS, INC, 439 DUKE STREET, LANCASTER, PA 17602-4967 USA, 2016) Dvořák Václav
- ItemApplication of fluid mechanics in textile technologies(VÚTS, a.s., Liberec, 2015) Adámek Karel; Kolář Jan; Peukert Pavel; Dvořák Václav; Petříková Markéta; Pelant Jaroslav
- ItemApplying a variable geometry ejector in a solar ejector refrigeration system(Elsevier BV, 2020) Nguyen Van Vu; Dvořák Václav
- ItemCAE methods for plate heat exchanger design(Elsevier Ltd., 2017) Dvořák Václav; Vít TomášThe heat recovery can substantially reduce energy consumption needful for heating or air conditioning of buildings. The aim of work is to develop a simple CAE method for rapid design and optimization of the dimensions of plate heat exchangers for heat recovery. Flow and heat transfer in an air-to-air recuperative counter-flow plate heat exchangers were investigated numerically. Pressure drop and effectiveness were evaluated as functions of inlet velocity for three sizes of real heat exchangers. Obtained data were analyzed, inlet/outlet cross-flow and middle counter-flow parts were investigated independently and data were substituted by suggested functions for Nusselt number and loss coefficients. These functions were used to illustrate the effect of heat exchanger dimensions. It proved that bigger heat exchangers provide higher effectiveness and lower pressure drop for the same flow rate, but also the heat transfer surface is larger. Derived equations which also take the effect of material thickness and plate pitch into account represent a useful tool for design and optimization of recuperative heat exchangers for use in HVAC systems.
- ItemContract research and development of new heat exchanger plates(2015) Dvořák Václav; Vít Tomáš; Kryštůfek Pavel
- ItemContract research of steam ejectors(2017) Dvořák Václav; Kracík Jan
- ItemContract research on the wind turbine(2017) Dvořák Václav
- ItemContractual development of a new heat exchanger(2017) Dvořák Václav; Vít Tomáš
- ItemContractual development of recuperative heat exchangers(2018) Dvořák Václav; Vít Tomáš
- ItemContractual research of flow in the compressor(2017) Dvořák Václav; Kracík Jan
- ItemConventional research into the atmosphere of the furnace(2017) Dvořák Václav
- ItemCorrection of a cleaning piston DN 500(2015) Dančová Petra; Novosád Jan; Vít Tomáš; Dvořák Václav
- ItemDesign of aNew Jet Pump(2020) Dvořák Václav
- ItemDesign of vapour ejector for refrigeration system based on CFD simulation.(2017) Dvořák Václav; Smierciew Kamil; Butrymowicz Dariusz; Gagan JerzyRenewable energy sources may be applied to drive refrigeration and air-conditioning systems, e.g. solar radiation, geothermal resources, heat derived from biomass combustion or waste heat rejected form various thermal processes. In this case absorption systems or ejection refrigeration systems may be used for cooling applications. The paper deals with numerical simulation applied for design of the ejector. Designed ejector is dedicated to the low-temperature driven ejection refrigeration system operating for district cooling system. Temperature and capacity of the motive heat are fixed. The 0D model was used for estimation of the ejector design and CFD simulations were used for validation and modification of the geometry of the ejector. Analysis were performed for the case of isobutane.
- ItemDevelopment of an Analytical Method for Predicting Flow in a Supersonic Air Ejector(2016) Kracík Jan; Dvořák Václav
- ItemDevelopment of heat exchanger for ventilation(2016) Dvořák Václav; Vít Tomáš
- ItemDevelopment of new heat exchanger plates(2015) Dvořák Václav; Vít Tomáš
- ItemDevelopment of optimization method for plate heat exchanger with undulation(2016) Dvořák Václav
- ItemEnthalpic heat-exchange apparatus(2016) Dvořák Václav; Vít Tomáš; Chlup Jaroslav; Hazuka Filip
- ItemEnthalpy heat exchanger(2015) Chlup Jaroslav; Hazuka Filip; Dvořák Václav; Vít Tomáš
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