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tujue
 
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Pridružen/a: pet srp 06, 2018 2:10 am

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Poslao/la tujue » sub kol 11, 2018 9:36 am

Excess humidity David Pastrnak Jersey , odors, and contaminants can often be controlled via dilution or replacement with outside air. However, in humid climates much energy is required to remove excess moisture from ventilation air.

Ventilating is the process of changing or replacing air in any space to control temperature or remove moisture, odors, smoke, heat, dust and airborne bacteria. Ventilation includes both the exchange of air to the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanicalforced and natural types. Ventilation is used to remove unpleasant smells and excessive moisture, introduce outside air, and to keep interior building air circulating, to prevent stagnation of the interior air.

Chicago Blower Canada Co. offer quite a few techniques of efficient building ventilation and cooling. In industrial plants where there is a high density of employees and many manual operations involved, an improvement in the environment can produce substantial benefits in terms of increased production, reduced errors, and a decline in complaints and absenteeism among employees. In other circumstances, the attentiveness of an audience or student group may be a factor that spells success or failure for the project.

To obtain a reasonable degree of personnel comfort in hot weather, there are three basic factors that should be provided for in the ventilation and coolong system of a commercial or industrial building.

Forced ventilation is used to control indoor air quality. Excess humidity, odors, and contaminants can often be controlled via dilution or replacement with outside air. However, in humid climates much energy is required to remove excess moisture from ventilation air.

Kitchens and bathrooms typically have mechanical exhaust to control odors and sometimes humidity. Factors in the design of such systems include the flow rate (which is a function of the fan speed and exhaust vent size) and noise level. If the ducting for the fans traverse unheated space (e.g., an attic), the ducting should be insulated as well to prevent condensation on the ducting. Direct drive fans are available for many applications, and can reduce maintenance needs.

Ceiling fans and tablefloor fans circulate air within a room for the purpose of reducing the perceived temperature because of evaporation of perspiration on the skin of the occupants. Because hot air rises, ceiling fans may be used to keep a room warmer in the winter by circulating the warm stratified air from the ceiling to the floor. Ceiling fans do not provide ventilation as defined as the introduction of outside air.

Another ype of venting - natural ventilation is the ventilation of a building with outside air without the use of a fan or other mechanical system. It can be achieved with operable windows or trickle vents when the spaces to ventilate are small and the architecture permits. In more complex systems warm air in the building can be allowed to rise and flow out upper openings to the outside (stack effect) thus forcing cool outside air to be drawn into the building naturally through openings in the lower areas. These systems use very little energy but care must be taken to ensure the occupants' comfort. In warm or humid months, in many climates, maintaining thermal comfort via solely natural ventilation may not be possible so conventional air conditioning systems are used as backups. Air-side economizers perform the same function as natural ventilation, but use mechanical systems' fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate.

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TIANJIN, China, July 7 (Xinhua) -- Host Tianjin's young bridge players proved their dominance at China's National Games here on Friday, keeping unbeaten record in the preliminaries of the Youth Group.


Tianjin earned 186.54 vps in 11 rounds and will face Guangdong in the semis. Beijing followed Tianjin at the second place in the preliminaries and will meet Shandong in the semis.


In the Open Group, Guangdong locked a semis berth in the last round by beating Jiangsu 22-17 Imps (International match points). Guangdong, which ranked fourth among 12 teams, will take on Hebei in the semifinals, while host Tianjin will play against Fujian.


In the women's group, the top four teams are Gansu, Beijing, Chongqing and Shanghai.


The bridge tournament of China's 13th National Games, which has six gold medals up for grab, will conclude on July 10. The tournament features six groups -- Open, Women, Youth, Pairs, Women Pairs and Youth Pairs.


Xi urges BRICS to promote open world economy, multilateralism, common development


China marks 80th anniversary of nationwide war against Japan


Aircraft carrier "Liaoning" sails near Lamma Island in HK


Rare photos commemorate 80th anniversary of "July 7 Incident"


Main structure of Hong Kong-Zhuhai-Macao Bridge finished


Aircraft carrier "Liaoning" sails near Lamma Island in HK


Tourists visit Int'l Bazar at Urumqi in NW China's Xinjiang


Lotus flowers blossom across China


MADRID, Feb. 27 (Xinhua) -- Following are the standings after Friday's match (tabulated under matches played, won, drawn, lost, goals for, goals against, points):


Real Madrid 24 20 0 4 74 22 60


Barcelona 24 18 2 4 67 14 56


Atletico Madrid 24 17 2 5 50 22 53


Valencia 24 15 5 4 43 21 50


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