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Heat transfer in rotor stator cavity
(EPJ Web of Conferences, 2015-05-06)This paper presents a procedure for experimental determining the local heat transfer coefficient in the rotor-stator cavity. As an operating medium is used a hot air with various mass flow rate and rotating speed of the ... -
Evaluation of the Effect of Tube Pitch and Surface Alterations on Temperature Field at Sprinkled Tube Bundle
(EDP Sciences, 2015-05-06)Water flowing on a sprinkled tube bundle forms three basic modes: It is the Droplet mode (liquid drips from one tube to another), the Jet mode (with an increasing flow rate droplets merge into a column) and the Membrane ... -
Effect of Tube Pitch on Heat Transfer in Sprinkled Tube Bundle
(Czech Technical University in Prague, 2015-10-31)Water flowing on a sprinkled tube bundle forms three basic modes: the Droplet mode (the liquid drips from one tube to another), the Jet mode (with an increasing flow rate, the droplets merge into a column) and the Membrane ... -
OPERATING SPECIFICATIONS OF CATALYTIC CLEANING OF GAS FROM BIOMASS GASIFICATION
(Czech Technical University in Prague,, 2015-12-31)The paper focuses on the theoretical description of the cleaning of syngas from biomass and waste gasification using catalytic methods, and on the verification of the theory through experiments. The main obstruction to ... -
Development Boiling to Sprinkled Tube Bundle
(EDP Sciences, 2016-03-28)This paper presents results of a studied heat transfer coefficient at the surface of a sprinkled tube bundle where boiling occurs. Research in the area of sprinkled exchangers can be divided into two major parts. The first ... -
Effect of size sprinkled heat exchange surface on developing boiling
(SAGE Publications Ltd,, 2016-06-19)This article presents research of sprinkled heat exchangers. This type of research has become rather topical in relation to sea water desalination. This process uses sprinkling of exchangers which rapidly separates vapour ... -
Measurement of an electronic cigarette aerosol size distribution during a puff
(EDP SCIENCES, 2017-05-12)Electronic cigarettes (e-cigarettes) have become very popular recently because they are marketed as a healthier alternative to tobacco smoking and as a useful tool to smoking cessation. E-cigarettes use a heating element ... -
Influence of temperature on the production and size distribution of fine particles released from beech wood samples
(2018-05-23)This study deals with laboratory investigation of fine particulate matter production over controlled heating of beech wood samples in the atmosphere with 21% of oxygen. From carried out measurements follow that majority ... -
Particulate Matter Produced by Micro-Scale Biomass Combustion in an Oxygen-Lean Atmosphere
(MDPI, 2018-12-01)This article extends earlier research by the authors that was devoted to the experimental evaluation of ultra-fine particles produced by the laboratory combustion of beechwood samples. These particles can have severe ... -
Performant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulation
(MDPI, 2019-02-16)This paper compares approaches for accurate numerical modeling of transients in the pipe element of district heating systems. The distribution grid itself affects the heat flow dynamics of a district heating network, which ... -
Experimental Verification of Impact of Sprinkled Area Length on Heat Exchange Coefficient
(Hindawi, 2019-04-01)On a sprinkled tube bundle, liquid forms a thin liquid film, and, in the case of boiling liquid, the liquid phase can be quickly and efficiently separated from the gas phase. There are several effects on the ideal flow ... -
Seasonal COP of an Air-to-Water Heat Pump when Using Predictive Control Preferring Power Production from Renewable Sources in the Czech Republic
(MDPI, 2019-08-22)The paper presents a parametric study evaluating the effects of various predictive controls on the operating parameters of heat pumps. The heat pump represents a significant power appliance in the residential sector. Its ... -
Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle
(MDPI, 2019-12-03)Spiral nozzles are widely used in wet scrubbers to form an appropriate spray pattern to capture the polluting gas/particulate matterwith the highest possible efficiency. Despite this fact, and a fact that it is a nozzle ... -
Characteristic Properties of Alternative Biomass Fuels
(MDPI, 2020-03-19)Biomass is one of the most promising renewable energy sources because it enables energy accumulation and controlled production. With this, however, the demand for biofuels grows and thus there is an effort to expand their ... -
Dispersion Characteristics of PM10 Particles Identified by Numerical Simulation in the Vicinity of Roads Passing through Various Types of Urban Areas
(MDPI, 2020-04-30)The dispersion of particulate matter emitted by road transport to the vicinity of roads is predominantly influenced by the character of the air velocity field. The air flow depends on factors such as the speed and direction ... -
Efficient Integration of Machine Learning into District Heating Predictive Models
(MDPI, 2020-12-02)Modern control strategies for district-level heating and cooling supply systems pose a difficult challenge. In order to integrate a wide range of hot and cold sources, these new systems will rely heavily on accumulation ... -
An overview of slagging and fouling indicators and their applicability to biomass fuels
(Elsevier, 2021-06-15)Slagging and fouling are common problems associated with biomass firing. The different nature of the mineral and phase composition of biomass ash makes the vast experience with coal firing insufficient for its translation ... -
Controlled nanoparticle growth by vapour condensation
(Tanger, 2022-02-25)Domestic boilers are generally characterized by higher emissions of airborne dust. A commonly used secondary method of reducing emissions in the energy sector is a cyclone. However, its wider expansion in households is ... -
Conditions Affecting Wind-Induced PM10 Resuspension as a Persistent Source of Pollution for the Future City Environment
(MDPI, 2022-07-27)Air pollution by particulate matter (PM) in cities is an ongoing problem with increasing severity. The biggest PM contributors are traffic and domestic fire burning. With the shift towards electromobility and the use of ... -
A Heat Exchanger with Water Vapor Condensation on the External Surface of a Vertical Pipe
(MDPI, 2022-08-03)The paper is concerned with water vapor condensation on vertical pipes. The vertical position of pipes in a condenser is not discussed very often. Its application has a number of particularities in terms of the numerical ...