Study of the fire resistance rating of fire dampers in the ventilation system

Summary

The results of testing fire dampers of the Vertro trademark: KZО-2-60-800×800-O-S220-T-KR, type KZО-2-60-O, KZО-2-90-800×800-O-S220-T-МC-KR, type KZО-2-90-O and KZО-2-120-800×800-O-М220-T-KR, type KZО-2-120-O against the declared fire resistance rating are considered. Fire dampers (fire-stopping) are designed to block the ventilation ducts in order to stop further fire spreading, supply fresh air to the fire sources, and provide for the smoke and other combustion products exhaust. The three valves are normally open, single-cassette with one flap, channel, with an outside drive. The valve body is made of galvanized steel. Along the flap perimeter there is a thermoactive seal that expands under the action of high temperatures and ensures the valve tightness. The flap is made of fire-resistant glass-magnesite. Depending on the fire resistance rating, a flap of different thickness is used. According to the test results, it was confirmed that the valves meet the fire resistance rating declared by the manufacturer.

Key words

ventilation system , fire damper , fire resistance rating , smoke exhaust

Improvement of Energy Efficiency of Pipeline Systems of a Building

Summary

Problems of the power saving in construction can be solved by means of reducing heat losses through the enclosing structures, installing heat and water meters, using nontraditional sources of heat supply et al. Issues of energy saving in pipeline engineering systems in the course of designing are not studied enough while a considerable part of power consumption by the systems of engineering support of buildings (up to 80%) falls on the drives of pumps and ventilators of pipeline networks: heating, water supply, ventilation, and air conditioning. Economic indexes are considered as criteria of energy efficiency of pipeline networks. The method of reduced expenditures is used for calculations.

Key words

energy efficiency , power consumption , heating system , ventilation system , reduced expenditures , rate of working medium movement