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Fernando abril1 trabajo inglés


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Fernando abril1 trabajo inglés

  1. 1. ENGLISH <ul><li>Fernando Abril de Moya </li></ul>
  2. 2. Lengthening life of equipment <ul><li>Influentian Factor </li></ul><ul><li>Reduce heat loads, review them in due course. </li></ul><ul><li>These actions make the life of equipment is longer. </li></ul>
  3. 3. Solar Heat Load <ul><li>Glass surface provide instantaneous heat gains. </li></ul><ul><li>Non-glass surfaces can either reflect or absorb solar energy. </li></ul>
  4. 4. Ocupant Heat Load <ul><li>Managers must take into consideration </li></ul><ul><li>Number of customers </li></ul><ul><li>Number of employees </li></ul><ul><li>Activity level </li></ul><ul><li>Clothing </li></ul>
  5. 5. Appliance Heat Load <ul><li>Heat generated by operating appliances can be reduced by: </li></ul><ul><li>Limiting appliance operating hours </li></ul><ul><li>Using more efficient lighting systems </li></ul><ul><li>Reducing light intensity </li></ul>
  6. 6. Ventilation Heat Load <ul><li>Heat removed from air as it is cooled </li></ul><ul><li>Ventilation air can be: </li></ul><ul><li>Fresh air </li></ul><ul><li>Re-circulated air </li></ul><ul><li>Or a mixture of the two </li></ul><ul><li>Cool air is allowed to circulate throughout the building by a ventilation system </li></ul>
  7. 7. TRANSMISSION & RESIDUAL HEAT LOADS <ul><li>Depends on interior and exterior temperature </li></ul><ul><li>Heat transmission coefficient </li></ul><ul><li>Surface areas exposed to the different temperatures </li></ul><ul><li>Heat transmission coefficient </li></ul><ul><li>Based on the insulation of the walls and roof </li></ul><ul><li>Insulation thickness </li></ul><ul><li>If cooling season is longer than the heating season, and summer temperature differences are greater than or equal to winter heating temperature differences, optimal is based on summer conditions </li></ul><ul><li>If an air-cooling system is constantly on, the residual load has little effect on the cooling requirements . </li></ul>
  8. 8. AIR COOLING <ul><li>Any treatment of the environment air within a building is air conditioning </li></ul><ul><li>Air cooling is any process that reduces air temperature </li></ul><ul><li>Refrigerated air is produced by a mechanical refrigeration cycle </li></ul><ul><li>Examples : </li></ul><ul><li>Air conditioning: fan that circulates air, filtering air, heating, cooling, humidifying, dehumidifying </li></ul><ul><li>Air cooling: fan blowing, coolers, swamp coolers, open windows </li></ul><ul><li>Refrigerated air: vapor compression, absortion cycles. </li></ul>
  9. 9. AIR COOLING SYSTEM Evaporative cooler very common system used in hospitality operations very economical total cooling energy required generally much less also filters air only work in dry climates be careful of harmful humidity works in kitchen
  10. 10. REFRIGERATED-AIR COOLING SYSTEM Ensures : cool and dehumidified air will be available throughout the cooling season Air moisture : condenses from air when it strikes a cold surface releases its talent heat of evaporation Moist air has a high dew point : the cold condensing surface (evaporator) must be below the dew-point temperature dehumidifies the air Depending on : Vapor compression & absorption cooling
  11. 11. TYPES DIRECT EXPANSION: cools ventilation air directly at the evaporatior can be used for most cooling requirements CHILLED WATER: common for medium or larger sized buildings uses basic water vapor system used to produce chilled water.