The Results of Experimental Determination of Air Output and Velocity of Flow in Double Skin Facades

Double skin facades very popular in this time. They are applied for construction of new buildings and for reconstruction. This paper to try to consider the main problems which appear during the work with the double skin facades. In paper are presented dependence of average velocity of air flow as functions from the geometrical sizes of the ventilated air gap of double skin facades and air output as functions from the geometrical sizes of air gap. This dependences are received experimentally. The received dependences can be used at design of double skin facades for the purpose of obtaining the optimum sizes of an air gap.

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Method of the boiler room ventilation system efficiency experimental determination

Theory and Building Practice ◽

10.23939/jtbp2020.02.084 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 84-91

Author(s):

Orest Voznyak ◽

◽

Yuriy Yurkevych ◽

Iryna Sukholova ◽

Oleksandr Dovbush ◽

...

Keyword(s):

Experimental Determination ◽

Average Velocity ◽

Air Flow ◽

Ventilation System ◽

Experimental Studies ◽

Air Velocity ◽

Air Jets ◽

Boiler Room ◽

Air Exchange

The issue of the normative air exchange ensuring in the premises of the boiler houses is extremely important. The article presents the results of theoretical and experimental studies of air velocity determination in the distribution of air by round and compact jets in the boiler room. Graphical and analytical dependences are given. The research results substantiate the higher accuracy of the average air flow velocity determination in small boiler rooms. The aim of the work is to develop a method for experimental determination of the efficiency of the ventilation system in the boiler room; to increase of the accuracy of the average velocity determination of the round and the compact air jets in the plane of the supply nozzle to ensure the normative air exchange of the boiler room and to substantiate of the calculation method. The characteristics and patterns of development of round and compact air jets in the premises are established and the calculated dependences are obtained. The unitless integral air velocity for the round and compact air jets in the boiler room is established. Calculation dependences for determining of the air flow rate in the boiler room have been obtained. It is substantiated that the application of the proposed method will significantly increase the accuracy of air exchange determination in the boiler rooms to ensure the required value in accordance with regulatory requirements. Also it is substantiated that to obtain satisfactory experimental results on speed measurements in the boiler room, it is necessary to measure the speed in the center of the supply nozzle several times with maximum accuracy. Then multiply the result by the relative average velocity: for a round jet vav = 0,26 and for a compact jet – vav = 0,2025. The obtained results allow to avoid a significant error (19 %) in determining the required air exchange ventilation of the boiler room. Recommendations for the practical determination of the calculated values to ensure proper ventilation of the boiler rooms are given.

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Conjugate-Mode Heat Transfer from a Module on the Base of a Parallel-Plate Channel to Forced Convective Air Flow. Experimental Determination of Macroscopic Thermal Conductance.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.61.1070 ◽

1995 ◽

Vol 61 (583) ◽

pp. 1070-1077 ◽

Cited By ~ 2

Author(s):

Sang Hee Park ◽

Wataru Nakayama

Keyword(s):

Heat Transfer ◽

Experimental Determination ◽

Parallel Plate ◽

Air Flow ◽

Thermal Conductance ◽

Plate Channel

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Improvement of the Double Skin Facades

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.725-726.41 ◽

2015 ◽

Vol 725-726 ◽

pp. 41-48 ◽

Cited By ~ 4

Author(s):

Mikhail Petrichenko ◽

Nikolai Vatin ◽

Darya Nemova

Keyword(s):

Numerical Simulation ◽

Theoretical Calculations ◽

Double Skin ◽

Double Skin Facades ◽

New Buildings

Double skin facades very popular in this time. They are applied for construction of new buildings and for reconstruction. But double skin facades contains some defects. In the present paper concrete constructive changes in a design of the Double skin facades which are offered. This changes will can to normalize heatmoisture conditions in the building. All proposed solutions are proved by theoretical calculations and numerical simulation.

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