Dehumidification >> Structural Drying

Convalescent heat substitute is a worldwide skill appropriate to vapor-density, direct-growth, and cooled-water air-handling-unit (AHU) coils; heat-driven desiccant Structural Drying equipment; dehumidifiers; supermarket, ice-rink, and natatorium air-conditioning and dehumidification systems; and bundled 100-percent-outside-air conditioners. This portion talks about five kinds of restorative sensible-heat trials overcooling while still meeting the dehumidification requirements of a conditioned area.

  1. The energy features of this skill are clarified in great detail. The general reason for this is that many Structural Drying proprietors and  creators are under the wrong assumption that there are no consequences that go along with the use of hot-gas or condensed-water reheat. This is not to say that one must always use some kind of restorative heat substitute in partiality to hot-gas or condensed-water reheat. It merely is to say that proprietors and creators must be aware that there is a far more energy-efficient way to achieve reheat while also lowering the required cooling amount. Also spoken in this portion are the four consequences related with the usual “new-energy” reheat and a Structural Drying skill that is used to evade one of those consequences: reheat using hot refrigerant gas.
  2. Restorative-dehumidification development are good answers for 100-percent-outdoor-air cooling units. Each of the first four development involves one heat-transferal expedient is situated upstream from the chief chilling coil and one heat-transfer expedient located downstream from the chief cooling coil. The upstream  expedient precools air as it enters the chief cooling coil, while the downstream  expedient reheats the air by the same change as it leaves the chief cooling coil. Other than a small Structural Drying upsurge in fan energy to overwhelm the added air resistance of the reheating sections and a fractional-hp  drive for the coil-loop enhancement, no external power is used.
  3.  If the heat exchange expedients are active for only a small time of the annual working hours, try the bypass dampers to minimize the annual energy impact. The first five development could be useful to any kind of primary cooling coil: chilled water, chilled glycol, or refrigerant. If the primary coil is of the refrigerant type, then the of the cooling system should be confirmed at mild- and cool-weather entering-air conditions to make sure that the  cooling system will function without compressor cycling or liquid slugging and with proper oil return. If the suction temperatures above 30 F are essential to pre-frost or ice buildup on the chief cooling coil.
  4. The performance of 100-percent outside-air restorative-Structural Drying development may vary from a maximum temperature differential at peak cooling to no temperature difference at an outside temperature of about 50 F. This performance generally is allowed because the dormant load of the outdoor air goes down with the outside temperature. Functions should be analyzed to decide if another reheat from hot refrigerant gas, the electric heating coils, thermal heating coils, or in-space heat sources is required to chieftain acceptable area conditions. Extra reheat coils, if needed, should be positioned downstream from the restorative-dehumidification reheat coil. Heating, restorative-reheat, and conservative reheat coils should be divided from the chief cooling coil to allow the Structural Drying condensed moisture to drain.

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