LATENT HEAT ENERGY STORAGE DEVICE AS А PART  OF THE VENTILATION SYSTEM OF INDIVIDUAL HOUSE

Energy efficient ventilation systems allow to minimize the heat energy consumption for heating supply air, which is very relevant in the context of rising energy prices. It is dealt with the variant of the installation seasonal phase-change heat storage device in the system of ventilation with recuperation of heat energy. Preliminary engineering calculations were perfomed and the quantity of heat storage material (water) necessary for the operation of the ventilation system was determined. The diagrams of change the temperature of the air at the output from the accumulator and distribution of water and ice during the heating period were given. In the article the calculation of seasonal heat storage device on the basis of the water in the supply air ventilation systems are considered , which allows to minimize costs of thermal energy for heating the outside air before it enters to the premises of the house. It is proved that in modern economy conditions development the energy-efficient ventilation system is a promising direction of research and implementations.

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Calculation of phace change heat accumulator in complex of energy efficient ventilation system

ACADEMIC JOURNAL Series Industrial Machine Building Civil Engineering ◽

10.26906/znp.2019.52.1697 ◽

2019 ◽

Vol 1 (52) ◽

pp. 191-196

Author(s):

Bogdan Kutniy ◽

Bogdan Novakh

Keyword(s):

Energy Efficient ◽

Ventilation System ◽

Ground Heat Exchanger ◽

Heat Accumulator ◽

Water Heaters ◽

Calculation Results ◽

Seasonal Heat ◽

Storage Batteries ◽

Ventilation Systems

The classification of the main seasonal heat energy storage batteries is given, and the modern circuit diagram of the phaseshift battery as part of the system with a heat pump and a solar collector is considered. The disadvantage of water heaters istheir large volume in most cases. By utilizing the accumulated latent heat of substances, a significant reduction in capitalcosts is achieved. The possibility of creating energy-saving ventilation systems with the use of a seasonal heat accumulatorworking on phase transformations of heat-accumulating material is considered. The linear stationary mathematical model ofthe battery thermal balance is made and on the basis of the calculation results graphs and diagrams are constructed enablingtoanalyze the work of the heat accumulator during the year. The classification of the main seasonal accumulators of thermalenergy and ventilation systems with a ground heat exchanger use is considered. In the article the theoretical andcomputational research of the seasonal heat accumulator creation and application possibility working on phase transitions ofheat-accumulating substances (water) in the ventilation system of a residential individual house is given.

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Energy efficient operational processes of adsorptive heat storage device based on composite “silica gel – sodium sulphate”

Collection of Scientific Publications NUS ◽

10.15589/znp2019.3(477).4 ◽

2019 ◽

Vol 3(477) ◽

pp. 27-34

Author(s):

Olena A. Bielianovska ◽

Roman D. Lytovchenko ◽

Kostiantyn M. Sukhyi ◽

Anton E. Buzov ◽

Mykhailo P. Sukhyi

Keyword(s):

Silica Gel ◽

Energy Efficient ◽

Heat Storage ◽

Sodium Sulphate ◽

Storage Device ◽

Operational Processes

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Energy and exergy analyses of advanced decentralized ventilation system compared with centralized cooling and air ventilation systems in the hot and humid climate

Energy and Buildings ◽

10.1016/j.enbuild.2014.05.009 ◽

2014 ◽

Vol 79 ◽

pp. 212-222 ◽

Cited By ~ 24

Author(s):

Moon Keun Kim ◽

Hansjürg Leibundgut ◽

Joon-Ho Choi

Keyword(s):

Ventilation System ◽

Humid Climate ◽

Energy And Exergy ◽

Air Ventilation ◽

Hot And Humid Climate ◽

Exergy Analyses ◽

Ventilation Systems

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DESIGN OF THE RECUPERATOR ON PULSATING HEAT PIPES FOR OBJECTS OF THE OIL AND GAS COMPLEX

Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas ◽

10.31471/1993-9965-2018-2(45)-16-23 ◽

2018 ◽

pp. 16-23

Author(s):

I. R. Vashchyshak ◽

Ye. R. Dotsenko

Keyword(s):

Heat Exchanger ◽

Energy Efficient ◽

Oil And Gas ◽

Ventilation System ◽

Heat Pipes ◽

Systems Development ◽

Capillary Vessel ◽

Private House ◽

Optimum Variant ◽

Ventilation Systems

The urgency of work is due to the expediency of ventilation systems development for structures and buildings with highly reliable energy-efficient recuperators. The ventilation systems of buildings and designs of air recuperators were analyzed and it wass determined that the optimum variant for a ventilation system of a private house would be a recuperator on heat pipes. The disadvantages of wick heat pipes were presented. The structure and principle of pulsating heat pipes were considered. The recuperator operation principle of pulsating heat pipes was given. A coolant was selected for the recuperator capillary vessel. The heat exchanger characteristics were calculated for pulsating heat pipes. The house ventilation system with the recuperator on the pulsating heat pipes was designed.

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Performance of Intermittent Personalized Ventilation Assisting Mixing Ventilation in the Presence of Indoor Disturbance

ASME 2019 Heat Transfer Summer Conference ◽

10.1115/ht2019-3473 ◽

2019 ◽

Cited By ~ 1

Author(s):

Douaa Al-Assad ◽

Kamel Ghali ◽

Nesreen Ghaddar

Keyword(s):

Ventilation System ◽

Pressure Gradients ◽

Breathing Zone ◽

Dynamics Model ◽

Pv System ◽

Low Frequencies ◽

Air Ventilation ◽

Airflow Field ◽

Personalized Ventilation ◽

Ventilation Systems

Abstract In this work, an office space is considered, equipped with an intermittent personalized ventilation (PV) system assisting a conventional mixing ventilation system. In ideal offices with no disturbances, it was proven that an intermittent PV average flow rate of 7.5 L/s and frequency of 0.86 Hz could enhance comfort compared to a steady PV and provide protection against contaminants present in the macroclimate. However, office spaces are subject to many disturbances, which could deteriorate the performance of air ventilation systems. In this work, an office door is considered to open disturbing the flow field by establishing pressure gradients. To conduct this study, a 3D computational fluid dynamics model was developed to predict the airflow field variables as well as contaminants’ concentration in the occupant-breathing zone. The model was used to assess the ability of the ventilation systems in maintaining its optimal operating parameters (0.86 Hz) obtained in ideal conditions. Results showed that the optimal PV frequency did not assure the same level of air quality. In fact, ventilation effectiveness decreased by 18% due to the opening door which pulled the PV jet away from the occupant’s breathing zone (BZ). Therefore, in office spaces with high disturbance levels, it is better off to operate the PV under steady state conditions to avoid further disturbance of the jet, or to operate the intermittent PV at low frequencies of 0.3 Hz to 0.5 Hz to minimize turbulence intensities created by the jet fluctuations.

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Development of the Ventilation System in Historical Buildings of St. Petersburg

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.633-634.977 ◽

2014 ◽

Vol 633-634 ◽

pp. 977-981 ◽

Cited By ~ 15

Author(s):

Vera Murgul ◽

Dusan Vuksanovic ◽

Viktor Pukhkal ◽

Nikolay Vatin

Keyword(s):

Residential Buildings ◽

Ventilation System ◽

Heating System ◽

Historic Buildings ◽

Engineering Systems ◽

Historical Buildings ◽

Saint Petersburg ◽

Air Ventilation ◽

Ventilation Systems

The article presents an analysis of the primary technologies used to arrange air ventilation systems in residential buildings in Saint-Petersburg during the late 18th and early 20th centuries. The historic buildings construction and engineering systems is indisputable interest and can be subject to conservation of historic buildings in addition to conservation of architectural facades. The article analyzed historical techniques ventilation device in conjunction with the heating system.

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Air quality and presence of air ventilation systems inside waterpipe cafés in North Carolina

Tobacco Control ◽

10.1136/tobaccocontrol-2018-054361 ◽

2018 ◽

Vol 28 (3) ◽

pp. 356-358 ◽

Cited By ~ 1

Author(s):

Andrew B Seidenberg ◽

Elizabeth N Orlan ◽

Mark J Travers ◽

Erin L Sutfin

Keyword(s):

North Carolina ◽

Air Quality ◽

Fine Particulate Matter ◽

Ventilation System ◽

Before And After ◽

Air Ventilation ◽

Waterpipe Cafés ◽

Time Periods ◽

Starting Date ◽

Ventilation Systems

BackgroundAfter North Carolina (NC) fire inspectors detected unsafe carbon monoxide (CO) levels inside several waterpipe cafés, the state fire code was amended to include provisions regulating waterpipe cafés, adding a requirement for air ventilation. These regulations apply to new buildings constructed after 1 January 2016, but can be enforced for older buildings where there exists a distinct hazard to life. We measured air quality at a sample of waterpipe cafés before and after the starting date of this regulation and collected information on presence of air ventilation.MethodsAir quality (CO, fine particulate matter (PM2.5)) monitoring was conducted inside and outside of six waterpipe cafés in NC in September of 2015 (time 1) and September of 2016 (time 2). In addition, questionnaires were administered to managers from each waterpipe café at time 2 to determine the presence of air ventilation systems.ResultsElevated levels of CO and PM2.5 were found inside waterpipe cafés at time 1 (median CO=42 ppm; median PM2.5=379.3 µg/m3) and time 2 (median CO=65 ppm; median PM2.5=484.0 µg/m3), with no significant differences between time periods (p>0.05). Indoor levels were significantly higher than levels outside cafés at both time periods (p<0.05). All waterpipe cafés reported having an air ventilation system that was installed prior to time 1 air monitoring.ConclusionsUnsafe levels of CO and PM2.5 were observed in waterpipe cafés in NC, despite reported use of air ventilation systems. Prohibiting indoor waterpipe smoking may be necessary to ensure clean air for employees and patrons.

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RESEARCH OF APARTMENT BUILDINGS‘VENTILATION SYSTEMS AND ANALYSIS OF SYSTEM RENEWAL OPTIONS / DAUGIABUČIŲ GYVENAMŲJŲ NAMŲ VĖDINIMO TYRIMAI IR SISTEMŲ ATNAUJINIMO GALIMYBIŲ ANALIZĖ

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2015.825 ◽

2015 ◽

Vol 7 (4) ◽

pp. 484-492 ◽

Cited By ~ 1

Author(s):

Kęstutis Valančius ◽

Sabina Paulauskaitė ◽

Violeta Motuzienė

Keyword(s):

Experimental Study ◽

Mechanical Ventilation ◽

Indoor Air ◽

Natural Ventilation ◽

Ventilation System ◽

Heating Season ◽

Apartment Buildings ◽

Air Ventilation ◽

Hygienic Conditions ◽

Ventilation Systems

The paper presents experimental study of apartment buildings' ventilation parameters which was carried out during the heating season. The results show that the existing apartment buildings often don‘t guarantee the hygienic conditions that are directly related to the indoor air ventilation. Also article contains an analysis of possibilities to upgrade the ventilation systems of apartment buildings. Four ventilation systems‘ upgrade options were examined. The economic analysis showed that according to the economic aspect the best solution for mechanical ventilation in the typical apartment houses is a centralized ventilation system which operates in combination with ground heat pump when supply ducts are mounted on the building facade, and extraction takes place at existing natural ventilation system channels. Straipsnyje pateikiami daugiabučių gyvenamųjų namų vėdinimo parametrų eksperimentiniai tyrimai, kurie buvo atlikti šildymo sezono metu. Tyrimų rezultatai rodo, kad esamuose daugiabučiuose namuose dažniausiai nėra užtikrinamos higieninės sąlygos, kurios yra tiesiogiai susijusios su šių namų vėdinimu. Taip pat straipsnyje pateikiama daugiabučio vėdinimo sistemų atnaujinimo galimybių analizė. Ekonomiškai išnagrinėti keturi vėdinimo sistemų atnaujinimo variantai. Atlikus ekonominę analizę, nustatyta, jog ekonominiu aspektu geriausias mechaninio vėdinimo sprendimas tipiniame daugiabučiame name yra centralizuota vėdinimo sistema, veikianti kombinuotai su gruntiniu šilumos siurbliu, kai tiekiamieji ortakiai montuojami ant pastato fasadų, o ištraukimas vyksta esamais natūralios vėdinimo sistemos kanalais.

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