scholarly journals Case 2: Market readiness for a residential ventilation system designed for providing better household living conditions and lower energy costs. The case of Lindab in Romania

10.5334/bbk.q ◽  
2019 ◽  
pp. 199-209
Author(s):  
Tudor EDU ◽  
◽  
Iliuta Costel NEGRICEA ◽  
Keyword(s):  
Lower Energy ◽  
Ventilation System ◽  
Living Conditions ◽  
Energy Costs

scholarly journals SMOKE CONTROL AND NOXES IN CAR PARKS

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
COSTEL-MARIAN PIETREANU ◽  
ROBERT-DUMITRU STRUGARIU ◽  
VALERIU PANAITESCU
Keyword(s):  
Control System ◽  
Ventilation System ◽  
Extraction System ◽  
Energy Costs ◽  
Jet Ventilation ◽  
Smoke Control ◽  
Car Park ◽  
And Control

<p>The main purpose of this article is to describe the principles of CO ventilation in car parks and to provide a brief description of smoke extraction and control system. It provides information on the possibilities provided by jet ventilation. In closed car park, inRomania, we use for CO and smoke extraction system fans and a lot of ducts. In many country of theEurope, they use for this jet ventilation system, without ducts, characterized by low installation and energy costs.</p>

Smart Homes and Sustainable Energy in Nigeria

2016 ◽  
pp. 66-89
Author(s):  
Oluwasola Oni
Keyword(s):  
Developing Countries ◽  
Lower Energy ◽  
Sustainable Energy ◽  
Smart Homes ◽  
Energy Costs ◽  
Future Perspectives ◽  
Factors Affecting ◽  
Limited Access ◽  
Advantages And Disadvantages ◽  
The Impact

In many developing countries, there is limited access to electricity with the populace typically resorting to purchasing personal electricity generating units. This research explores the factors affecting the possibility of introducing smart homes that would conserve electricity, reduce a need for reliance on the national grid and lower energy costs. Advantages and disadvantages, as well as the impact on society and development in general are examined in addition to future perspectives on smart homes and sustainable energy.

scholarly journals Aluminium Alloys Smelting in Shaft- Reverberatory Furnaces in a Liquid Bath Mode

2017 ◽  
Vol 17 (2) ◽  
pp. 183-189
Author(s):  
V. Grachev
Keyword(s):  
Aluminum Alloys ◽  
Lower Energy ◽  
High Efficiency ◽  
Reverberatory Furnace ◽  
Continuous Operation ◽  
Liquid Bath ◽  
Metal Loss ◽  
Energy Costs ◽  
Efficiency And Productivity ◽  
Reduce Metal Loss

AbstractThe aim of research was creation of a furnace for aluminum alloys smelting “in a liquid bath” in order to reduce metal loss. In the paper, the author demonstrates the results of research on smelting of aluminum alloys in a shaft-reverberatory furnace designed by the author. It has been shown that smelting aluminum alloy in a liquid bath was able to significantly reduce aluminum loss and that shaft-reverberatory design provided high efficiency and productivity along with lower energy costs. Ensuring continuous operation of the liquid bath and superheating chamber, which tapped alloy with the required texture, was achieved by means of the optimal design of partition between them. The optimum section of the connecting channels between the liquid bath of smelting and the superheating chamber has been theoretically substantiated and experimentally confirmed. The author proposed a workable shaft-reverberatory furnace for aluminum alloys smelting, providing solid charge melting in a liquid bath.

scholarly journals Critical evaluation of the factorial and heart-rate recording methods for the determination of energy expenditure of free-living elderly people

1997 ◽  
Vol 78 (5) ◽  
pp. 709-722 ◽  
Author(s):  
Beatrice Morio ◽  
Patrick Ritz ◽  
Elisabeth Verdier ◽  
Christophe Montaurier ◽  
Bernard Beaufrere ◽  
...  
Keyword(s):  
Heart Rate ◽  
Energy Expenditure ◽  
Elderly People ◽  
Living Conditions ◽  
Energy Costs ◽  
Free Living ◽  
Factorial Method ◽  
Recording Method ◽  
Mean Differences ◽  
Free Living Conditions

The aim of the present study was to validate against the doubly-labelled water (DLW) technique the factorial method and the heart rate (HR) recording method for determining daily energy expenditure (DEE) of elderly people in free-living conditions. The two methods were first calibrated and validated in twelve healthy subjects (six males and six females; 70·1 (sd 2·7) years) from opencircuit whole-body indirect calorimetry measurements during three consecutive days and during 1 d respectively. Mean energy costs of the various usual activities were determined for each subject using the factorial method, and individual relationships were set up between HR and energy expenditure for the HR recording method. In free-living conditions, DEE was determined over the same period of time by the DLW, the factorial and the HR recording methods during 17, 14 and 4 d respectively. Mean free-living DEE values for men estimated using the DLW, the factorial and the HR recording methods were 12·8 (sd 3·1), 12·7 (sd 2·2) and 13·5 (sd 2·7) MJ/d respectively. Mean free-living DEE values for women were 9·6 (sd 0·8), 8·8 (sd 1·2) and 10·2 (sd 1·5) MJ/d respectively. No significant differences were found between the three methods for either sex, using the Bland & Altman (1986) test. Mean differences in DEE of men were -0·9 (sd 11·8) % between the factorial and DLW methods, and +4·7 (sd 16·1) % between the HR recording and DLW methods. Similarly, in women, mean differences were -7·7 (sd 12·7) % between the factorial and DLW methods, and +5·9 (sd 8·8) % between the HR recording and DLW methods. It was concluded that the factorial and the HR recording methods are satisfactory alternatives to the DLW method when considering the mean DEE of a group of subjects. Furthermore, mean energy costs of activities calculated in the present study using the factorial method were shown to be suitable for determining free-living DEE of elderly people when the reference value (i.e. sleeping metabolic rate) is accurately measured.

scholarly journals Hierarchical Neighborhood Models for Ventilation System

2018 ◽  
Vol 7 (3.5) ◽  
pp. 24 ◽  
Author(s):  
A.M Shmyrin ◽  
N.M Mishachev ◽  
V.V Semina
Keyword(s):  
Air Conditioning ◽  
Ventilation System ◽  
Dust Emission ◽  
Environmental Safety ◽  
Optimal Operation ◽  
Energy Costs ◽  
Air Conditioning System ◽  
Cement Production ◽  
Neighborhood Models ◽  
Production Shop

Considering cement production, we deal with dust, associated with a non-optimal operation of the dust-free ventilation system in the clinker burning department. The optimally organized heating, ventilating, and air conditioning system in any type of production ensures the microclimate of the production premises, corresponding to the sanitary norms and rules, which contribute to the increase of the staff’s efficiency. In this paper, the questions of the neighborhood modeling of the heating, ventilating, and air conditioning system in the premises of the cement production shop are considered. A system for minimizing energy costs and reducing dust emission in the clinker burning shop is proposed, which allows increasing the environmental safety of production. 

scholarly journals Energy efficient technology of obtaining heat-insulating material based on vermiculite

2019 ◽  
Vol 97 ◽  
pp. 06044
Author(s):  
Zhumabuke Ospanova ◽  
Nurgul Alibekova ◽  
Nursultan Satan
Keyword(s):  
Microwave Heating ◽  
Energy Efficient ◽  
Lower Energy ◽  
Energy Costs ◽  
Efficient Technology ◽  
Insulating Material ◽  
Energy Efficient Technology

The paper presents energy-efficient technology with using microwaves to swell vermiculite. Replacement of traditional firing of vermiculite during exfoliation due to the use of microwave heating is promising, primarily due to lower energy costs.

scholarly journals Effects of Cold and Hot Infusions on Antioxidant Activities of Rosehip Tea Bag

2021 ◽  
Vol 9 (8) ◽  
pp. 1455-1459
Author(s):  
Zeynep Akar ◽  
Erza Orhan ◽  
Seçil Durmuş
Keyword(s):  
Antioxidant Activity ◽  
Lower Energy ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Energy Costs ◽  
Antioxidant Power ◽  
Tea Infusions ◽  
Different Temperatures ◽  
Determination Methods

In this study, the antioxidant activity values of infusions at different temperatures of the commercially sold rosehip tea bag. To determine the effect of different infusion temperatures on antioxidant activity, 7 different temperatures (0, 15, 30, 45, 60, 75, 90°C) also including cold infusions temperatures were selected. Infusions of the rosehip tea bags were prepared with packaged drinking water for 5 minutes (recommended time in tea bag packaging) at these temperatures. Antioxidant activity values of the infused extracts were determined by antioxidant activity determination methods: TPC (Total Phenolic Compound), CUPRAC (Cu (II) Ion Reducing Antioxidant Capacity), FRAP (Iron (III) Ion Reducing Antioxidant Power) and ABTS•+ (2.2-azinobis- (3-ethylbenzothiazoline-6-sulphonic acid)) radical scavenging assay. According to the results obtained by the antioxidant determination methods, the highest and lowest activity values for TPC, FRAP and ABTS were measured at 90°C and 0°C, respectively, and a positive correlation was found between temperature and antioxidant activity values. Contrary to the activity values determined in these methods, in the CUPRAC method, the highest and the lowest activity value was measured at 45°C and 90 °C, respectively. As determined in the CUPRAC method, infusions of rosehip tea at low temperatures may provide an advantage in terms of the solubility of some phenolics that can be denatured at high temperatures. In addition, rosehip tea infusions at lower temperatures will contribute to lower energy costs.

scholarly journals Effects of Selected Warm Mix Asphalt Additives on Viscosity Properties of Binder

2018 ◽  
Vol 1 (1) ◽  
pp. 80-84
Author(s):  
Bekir Aktas ◽  
Şuayıp Aytekin ◽  
Şevket Aslan
Keyword(s):  
Energy Consumption ◽  
Lower Energy ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Energy Costs ◽  
Great Effort ◽  
Rotational Viscometer ◽  
Production Temperature ◽  
Emission Ratios

Asphalt industry has spent great effort to reduce mixing and compaction temperatures of the asphalt mixture because of increasing emission ratios and energy costs. The production of Warm Mix Asphalt (WMA) is related to attaining proper viscosity value of the binder to increase aggregate-binder bonding and compaction of the mixture at lower temperatures. The most important advantages of WMA are lower energy consumption and less pollution. Generally, the production temperature of the asphalt mixture depends on the asphalt properties. In this study, effects of selected warm mix asphalt additives of a certain amount by weight are investigated in terms of viscosity in a Brookfield Rotational Viscometer. The reducing viscosity of the binders will increase production and compaction ability of the mixtures. Also, it will allow to reduce mixing and compaction temperature. Therefore, with the decreased cooling rate asphalt mixtures can haul longer distances and give more time for site construction. The findings of this study show that under the same rotational speed viscosity decreases when additives are used.

Sign in / Sign up

Export Citation Format

Share Document