ors in rooms. Air temperature at the surface of floor and at head level should not differ by more than 5 degrees. In addition to natural ventilation supply there is exhaust ventilation. The main parameter that determines the characteristics of ventilation system is multiplicity of exchange ie how many times per hour will change the air in room.is necessary to calculate Vvent (Volume of air required for the exchange) and Vroom (the amount of working space). In order to calculate let s use the following premise: (length)=10 m, A (width)=5 m, H (height)=3 m., The amount of space equal to: Vroom=A * B * H= 150 square meters.to exchange the air volume Vvent is defined by the basis of the heat balance equation:
(5.2)
- excess heat (W)
С=0,237 - thermal conductivity of air (W/kgK)=1,2 - the air density (kg/m3) temperature of the outgoing air is given by:
(5.3)
=1 5 degrees - excess of t to 1 m height of room
=25 degrees - temperature in workplace
Н=3 м. - height of room
=20 degrees
(5.4)
- excess heat from electrical equipment and lighting
(5.5)
Е - coefficient of energy losses on heat sink (E=0.55 for lighting) - power, p=40 Вт * 20=800 W
W
- heat input from solar radiation
(5.6)
- number of windows, let s take m=2- window area, S=2,5 * 2=5 m.2- factor taking into account glazing. For double glazing, k=0,6
- 127 W/m - heat input from the windows
W
- heat of people
(5.7)
q=80 W/person- number of people
W
Wthe heat balance equation should be:
=2802/(0,237 * (26 - 20) * 1,2)=1648
The best option is air conditioning ie automatically maintain its status in environment and in accordance with certain requirements eg set temperature, humidity, air mobility and regardless of changes in state and outside air conditions.
5.5 Providing electrical safety
installations which include almost all computer equipment provide for human a potential danger because in the maintenance operation people can touch parts under voltage. Any disturbance current can cause electrical injury ie damage body caused by electric current or electric arc. In addressing the issue of the safety of the developer to identify three main factors:
- electrical workplace of programmer
- auxiliary equipment
- environment of room
Built-in devices of the workplace include: server, computer, monitor and printer. To accessory equipment includes local lighting lamps, fans and other electrical appliances.place which the programmer is working affects for electrical insulation of equipment and devices, electrical resistance of human body and can create conditions for shock.rooms, equipped with computer facilities are generally classified as areas without heightened risk because:
relative humidity does not exceed 65-70%
there is no conductive dust
temperature does not exceed the long 30 ° C
having a connection with the earth metallic structures
lack of access to live parts of the equipment
there is no conductive floors, to prevent electrical user injuries necessary comply the safety requirements when working with conventional appliances.
. 6 Fire protection
solve fire safety problems, we need to first identify and justify the category of space. One of the most important tasks of fire protection is to protect the places from damage and provide them with adequate strength under high temperatures during a fire. Given the high cost of electronic equipment facilities of the institution, as well as category of its fire hazard, the building should be 1 and 2 degree of fire resistance.construction of buildings JSC IITU consists of 10 floors and the laboratory is located on the 3rd floor. For the manufacture of building structures used brick, concrete, glass, metal and other non-combustible materials. Wood should be limited and in the case of use necessary to impregnate flame retardants.is also necessary to provide fire barriers in the form of partition of non-combustible materials placed in the rooms of our institution. Considering that our building contains engineering equipment such as computers, printers, etc. and the space is C class of possible fire used indoors extinguishers OP - 5 based on carbon dioxide or dry powder. According to NPB 110-03 building is equipped with automa...
