Natural Ventilation and Forced Warm Air Ventilation in Offices

2014 ◽  
Vol 899 ◽  
pp. 256-259
Author(s):  
Mária Budiaková
Keyword(s):  
Natural Ventilation ◽  
Ventilation System ◽  
Basic Element ◽  
Transitional Period ◽  
Air Ventilation ◽  
Double Skin ◽  
Saving Mode ◽  
The Right ◽  
Radiant Floor Heating ◽  
Floor Heating

The paper is oriented on the natural ventilation and forced warm air ventilation systems in offices. The basic element of natural ventilation system in office building is double skin facade. The natural air circulation is undertaken by the right shaping of vertical shafts for exhaust air. Furthermore, the intelligent double skin facade in transitional period contributes to the heating and in summer to natural cooling of offices. Therefore, the forced warm air ventilation, which is provides heating of offices, can operate in saving mode and can be supplemented by radiant floor heating. By the effort to approach to zero energy balance, it is important to undertake thermal comfort. Therefore, I did experimental laboratory measurements for forced warm air ventilation and I also did it because of comparison for radiant floor heating. In this paper, I will present scientific analysis and the outputs from my own measurements. In the conclusion of this paper on the basis of outputs of experimental measurements I will define the principles for designing forced warm air ventilation and radiant floor heating in offices.

Efficiency of Natural Ventilation in Central Greenhouse of Botanical Garden in Kosice

2017 ◽  
Author(s):  
Martin Kovac ◽  
Katarina Kovacova ◽  
Anna Sedlakova
Keyword(s):  
Indoor Environment ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Botanical Garden ◽  
Simulation Tool ◽  
Summer Period ◽  
Radiation Level ◽  
Glass Panels ◽  
The Right ◽  
Calculated Model

The object of paper is analysis of natural ventilation system in central greenhouse of Botanical garden in Kosice. The greenhouse was refurbished in 2015. The existing greenhouse covering from glass panels was replaced for polycarbonate panels. The ventilation system of central greenhouse is natural and there are used openings in covering (wall, roof). It is combination of thermally and wind driven ventilation. The main aim of contribution is to analyse different modes of natural ventilation during summer period mainly. The important factors that influence efficiency of natural ventilation in greenhouse are location and area of openings, temperature stratification in greenhouse, solar radiation level, wind speed and direction too. If the greenhouse is ventilated naturally only through external windows (roof windows are closed) the efficiency of ventilation is very poor. The defined modes of natural ventilation search the right location and size of opened windows in order to achieve the most efficiency ventilation of indoor environment. For this purpose the progressive dynamic simulation tool DesignBuilder is used where the geometrical and specific calculated model of whole central greenhouse was created.

Acoustical Improvements with Natural Air Ventilation in the Liu Institute for Global Issues at the University of British Columbia

2011 ◽  
Vol 6 (1) ◽  
pp. 114-122
Author(s):  
Zohreh Razavi ◽  
Max Richter ◽  
Murray Hodgson ◽  
Alireza Khaleghi
Keyword(s):  
Natural Ventilation ◽  
Ventilation System ◽  
Green Building ◽  
Optimized Design ◽  
Global Issues ◽  
University Of British Columbia ◽  
Air Ventilation ◽  
The University ◽  
Building Designs

Low speech privacy in shared and private offices in one of the early generation of a “green” building resulted in occupants' dissatisfaction. This problem is experienced in Liu institute with a natural-ventilation system. Such a system requires low air-flow resistance which is achieved by large openings which will result in noise transmission between various spaces within the building. The poor acoustical quality in this building resulted in occupants' noise complaints which were further investigated by way of relevant acoustical measurements. CATT-Acoustic software was utilized to modify the acoustical quality of the building without any disturbance to the occupants. The optimized design of the transfer box above the office door was selected based on CATT-Acoustic predictions. The acoustical measurements were conducted after installation of the transfer box above the office door. The measurements' results agreed with the predictions which led to improved speech privacy to an acceptable level between the office and the corridor in Liu Institute. More work should be done to improve the acoustical quality of natural-ventilated building to conform to ANSI standards.1The results of this study strongly support including acoustics in “green” building designs with natural ventilation to avoid users' complaints.

Effective Ventilation and Heating Systems in Office Buildings

2013 ◽  
Vol 649 ◽  
pp. 189-192
Author(s):  
Mária Budiaková
Keyword(s):  
Renewable Energy Sources ◽  
Ventilation System ◽  
Office Buildings ◽  
Concrete Core ◽  
Heating Systems ◽  
Heating And Cooling ◽  
Recovery System ◽  
Double Skin ◽  
Effective Ventilation ◽  
Radiant Floor Heating

The paper is oriented on the effective ventilation, heating and cooling systems in office buildings by utilization of renewable energy sources. All these systems must be in mutual harmony and ensure thermal comfort. Ventilation system must use the power of wind, the heated air from the double skin facade, heat recovery system, preheating or cooling in the ground channel. In the summer, there must be used the night natural cooling of building. For the heating is the most suitable to use radiant floor heating (30%) in combination with radiant ceiling heating (70%). The next progressive way is the combination of new concrete core conditioning and floor convector heaters.

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

2015 ◽  
Vol 7 (4) ◽  
pp. 484-492 ◽  
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.

MODELING AND FABRICATION OF A KINETIC SOLAR ENERGY-ABSORBING WINDOW AS A GREEN IDEA FOR SUSTAINABLE FUTURE BUILDINGS

2018 ◽  
Vol 13 (2) ◽  
pp. 145-162 ◽  
Author(s):  
Masoud Valinejadshoubi ◽  
Mannan Ghanizadehgrayli ◽  
Sahar Heidari
Keyword(s):  
Energy Consumption ◽  
Natural Ventilation ◽  
Cooling System ◽  
Ventilation System ◽  
Weather Conditions ◽  
Vital Role ◽  
Design Strategies ◽  
Heating And Cooling ◽  
Primary Means ◽  
Double Skin

INTRODUCTION Renewable versus nonrenewable energy sources and their respective environmental impacts have emerged as preeminent industrial, as well as environmental concerns. Negotiation between policies that promote economic development with those promoting conservationism has yielded promising opportunities for the future. These opportunities engage frameworks focused on economic directives while simultaneously considering the need for environmental directives. Buildings present a unique opportunity for sustainability as they represent the largest proportion of consumed energy, relative to other consumers reliant on the energy grid system. The largest source of energy expenditure in a modern building is through the heating and cooling system which facilitates and maintains a comfortable living temperature. By effectively implementing innovative approaches focused on energy preservation and overall reduction of consumption, it is possible to meet emission reduction goals and mitigate other adverse environmental conditions. Windows play a vital role in energy consumption and overall maintenance of a comfortable temperature. Understandably, the construction and fabrication of windows are the primary means through which optimized temperatures are achieved. This occurs not only through heat and energy transference but also by providing a protective differential between the inside of the building and the harsh weather conditions of the outdoors. As such, appropriate widow design strategies not only enhance comfort but reduce overall energy consumption. This study seeks to evaluate double-skin windows in order to offer a solution to excessive energy consumption. The windows work by generating a natural ventilation system in summer and then by producing hot air in winter for year-round comfort that is economical. Since current double-skin windows fail to effectively provide ventilation during warm seasons, a kinetic double-skin window was proposed to address this problem and optimize the heating and cooling functions of the building. The results of this research are applicable to modern construction and can be implemented into current design structures.

scholarly journals Angka kuman udara ruang rawat inap anak dengan dan tanpa air conditioner (AC) di rumah sakit

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Raimunah Raimunah ◽  
Leka Lutpiatina ◽  
Jasmadi Joko Kartiko ◽  
Wahdah Norsiah
Keyword(s):  
Indoor Air ◽  
Bacterial Infections ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Sampling Technique ◽  
Plate Count ◽  
Air Conditioner ◽  
Important Place ◽  
Ac Sampling ◽  
Air Ventilation

Air microorganisms can be found in outdoor or indoor air, ventilation is a very important place in the exchange of indoor air. Ventilation system is divided into two, namely natural ventilation and artificial ventilation in the form of Air Conditioner (AC). This study aims to determine the description of the number of germs in the inpatient wards of children using Air Conditioner (AC) and non (AC) at the Hospital in Martapura city area. This type of research is descriptive survey, the population is the inpatient room of children using Air Conditioner (AC) and non (AC). Sampling using purposive sampling technique, that is as much as 8 room. The examination method used is by TPC (Total Plate Count) method. The results showed that the number of airborne bacterial infections using the Air Conditioner (AC) was 406 CFU/m3. The total number of non-living inpatients (AC) is 443 CFU/m3. The standard maximum number of microorganisms (CFU / m3) of treatment room according to Kepmenkes No.1204/ Menkes/SK/X/2004 is 200-500 CFU / m3.

scholarly journals Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1321
Author(s):  
Yu-Jin Hwang ◽  
Jae-Weon Jeong
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Residential Buildings ◽  
Heating Systems ◽  
Air Source Heat Pump ◽  
Heating Capacity ◽  
Heating Loads ◽  
Radiant Floor Heating ◽  
Floor Heating ◽  
Floor Temperature

The objective of this research is to establish an appropriate operating strategy for a radiant floor heating system that additionally has an air source heat pump for providing convective air heating separately, leading to heating energy saving and thermal comfort in residential buildings. To determine the appropriate optimal operating ratio of each system taking charge of combined heating systems, the energy consumption of the entire system was drawn, and the adaptive floor surface temperature was reviewed based on international standards and literature on thermal comfort. For processing heating loads with radiant floor heating and air source heating systems, the heating capacity of radiant floor heating by 1 °C variation in floor temperature was calculated, and the remaining heating load was handled by the heating capacity of the convective air heating heat pump. Consequently, when the floor temperature was 25 °C, all heating loads were removed by radiant floor heating only. When handling all heating loads with the heat pump, 59.2% less energy was used compared with radiant floor heating only. Considering the local discomfort of the soles of the feet, the floor temperature is expected to be suitable at 22–23 °C, and 31.5–37.6% energy saving compared with those of radiant floor heating alone were confirmed.

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