Passive cooling and ventillation Research Paper Example | Topics and Well Written Essays - 750 words

Passive cooling and ventillation - Research Paper Example Structural designs that involved window designs, wall thickness and shading, roofing styles, low heat conductance material, external microclimate control, water bodies and structure stance characterized the era. The contemporary building designs should consider the historical strategies in order to utilize unharnessed resources and reduce energy consumption that leads to resource depletion (Santamouris and Kolokotsa 5). Heat is transferred through three ways, conduction, radiation as well as convention. The three form the basis for heat control ideologies. The construction engineers require having insight on the site’s climate and whether patterns to successfully employ the passive cooling techniques. Most important information they need include the sun’s positions throughout the year and direction of winds (Youtube 1). The wall and windows transfer heat across from the external environment to the internal environment through conduction. The choice of materials to compr ise the wall and windows determine the efficiency of the building in blocking out undesired heat. Use of a high R-value material for walls ensures minimal heat transfer thus maintaining the inner environment cool. A low U-value material for windows acts in a similar way. ... Another strategy is planting of vegetation on the roof. The plants absorb most of the heat and loose it through evapo-transpiration thus the building remains relatively cool. Alternatively, making the roof dome-shaped reduces the surface area for radiation. At least one side of the dome will be shaded at any time. Therefore, while the other side radiates heat into the doomed space beneath the roof the shaded side will be re-radiating the heat out to the atmosphere. The walls directly illuminated by sun radiate heat into the building too. The design should be such that sunshades cover greater surface of the wall to reduce radiation surface. Deep engravings on the wall increase shaded surface area thus reducing radiation area as well (Asif 11) Windows offer another media for heat radiation in and out of the building. Depending on the direction the wall faces, window-to-wall surface ratio optimization helps regulate heat transfer. The windows should comprise of material that allows in o nly visible light while reflecting back ultraviolet and infrared rays. Depending on the time of day and season, window shutters reduce the internal temperatures by hindering radiation (Asif 11). Heat transfer into or out of the building may be resultant of air mass movement. Gaps or openings on the walls and windows allow heat to seep into the building increasing the internal temperature. Gaps on walls should be located on sides that face away from the sun depending on geographical location. Sealing the openings between windows and walls appropriately reduces seepage of hot air into the building. However, the openings may act as a means of cooling the internal spaces

SWOT &TWOS analysis of QATAR NATIONAL BANK and MASHREQ bank Essay

SWOT &TWOS analysis of QATAR NATIONAL BANK and MASHREQ bank - Essay Example The Qatar National Bank is one of the most secure banks in the world. The number of recorded cases of fraud and theft in Qatar national Bank is recorded to be at the minimum. This is mainly because of the sharia laws that they uphold and their tight security when it comes to safeguarding their assets. Although it is the most dominant bank in the middles east and North Africa, it has not exploited the western and westernized countries whose main religion is Christianity such as Americas, Europe and southern parts of Africa. Since it is an Arabic/Islamic Bank, most western investors and would-be clients in countries such as Germany, The USA and Europe, are resilient to bank with them due to the notion that they might be supporting terrorists or due to their strong diplomatic loyalty to their country. Most African countries have a high number of Muslims and Arabs. Due to this the Qatar National Bank has a high opportunity to expand in these areas through acquisitions and promoting more people to join Islamic banking. (Hossain & Leo, 2009) Over the years there has been an increase in the demand for bond market in the Middle East, most Islamic states and Qatar in general. This is a great opportunity for Qatar National Bank to expand as the actions propel the growth of banks There is a great opportunity to exploit the western countries. This can be done through campaigns to discourage acts of terrorism and campaigns to unite the eastern and western countries together to eradicate the fear that western clients might have. Due to the recent introduction of more banks who are offering services at a lower price, their might be a decrease in foreign investments in the Middle East and Qatar which will in the long run affect the bank (Mostafa 2009) Mashreq bank is globally known and is one of the most productive and effective banks in the United Arab Emirates UAE. It has also achieved recognition by the