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Sac - Wac

The document describes the working principles of a summer and winter air conditioner. A summer air conditioner works on refrigeration principles to provide cooling and dehumidification, while a winter air conditioner works on heat pump principles to provide heating and humidification. Both units filter air, regulate temperature and humidity using thermostats and humidistats, mix fresh and recirculated air, and exhaust stale air to maintain indoor comfort levels.

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Adyasa Choudhury
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0% found this document useful (0 votes)
910 views4 pages

Sac - Wac

The document describes the working principles of a summer and winter air conditioner. A summer air conditioner works on refrigeration principles to provide cooling and dehumidification, while a winter air conditioner works on heat pump principles to provide heating and humidification. Both units filter air, regulate temperature and humidity using thermostats and humidistats, mix fresh and recirculated air, and exhaust stale air to maintain indoor comfort levels.

Uploaded by

Adyasa Choudhury
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Summer Air Conditioner

Principle: A Summer Air Conditioner works on the principle of a Refrigerator.


It performs the function of Sensible cooling & De humidification of air under warm and
humid outdoor conditions.
It helps achieve & maintain thermal comfort conditions by maintaining the DBT of
Indoor space in the range of 21⁰C to 26⁰C & RH in the range of 30% to 60 %.

Working: The integrated air filter unit removes contaminants such as SPM, molds,
spores, pollen, odours, etc from Outside Air. Moisture in the air condensed at the
evaporator coil is collected in the Condensate Pan which is then drained to the outside.
The Cooling Coil temperature is also referred to as the Apparatus Dew Point (ADP) that
can be set by means of a Thermostat.
The De Humidifier regulates the humidity of air entering the indoor spaces and can be
adjusted by means of a Humidistat. The Humidistat & Thermostat controls are
incorporated into User access control panels from where they can be programmed.

Conditioned air within the living space becomes warm & stale over a period of time. This
is exhausted to the outside through exhaust vents. However, a part of the Return air
(upto 70%) may be recirculated back into the supply duct for achieving economy of
energy. The recirculation is controlled by means of a damper unit that controls the
percentage of RC air inducted. The damper opening is controlled by the user depending
upon the desired levels of comfort/economy.
Summer Air Conditioner

Dampers Temp & Humidity Control Panel

Zone Thermostat
Exhaust Air
DeHumidifier Return
Recirculated Air Air
Exhauster Membrane

Conditioned Air
Mixing DBT – 21 to 26°C
Box RH – 30 to 60 %
Fresh Air
Condensate Pan Blower
Filter Unit

Cooling Coil
Winter Air Conditioner
Principle: A Winter Air Conditioner works on the principle of a Heat Pump.
It performs the function of Sensible Heating & Humidification of air under Cold and Dry
outdoor conditions. It helps achieve & maintain thermal comfort conditions by
maintaining the DBT of Indoor space in the range of 21⁰C to 26⁰C & RH in the range of
30% to 60 %.

Working: The integrated air filter unit removes contaminants such as SPM, molds,
spores, pollen, odours, etc from Outside Air.
The Pre Heater Unit can be powered by means of a sustainable heat source that uses
waste heat from Geothermal pumps, Solar hot water systems or Biomass combustion
unit.
The Humidifier regulates the humidity of air and can be adjusted by means of a
Humidistat.
The Apparatus Dew Point temperature of the Heating Coil can be set by means of a
Thermostat.
The Humidistat & Thermostatic controls are incorporated into User access control
systems from where they can be programmed.

Conditioned air within the living space becomes warm & stale over a period of time. This
is exhausted to the outside through exhaust vents. However, a part of the Return air
(upto 70%) may be recirculated back into the supply duct for achieving economy of
energy. The recirculation is controlled by means of a damper unit that controls the
percentage of RC air inducted. The damper opening is controlled by the user depending
upon the desired levels of comfort/economy.
Winter Air Conditioner

Temp & Humidity Control Panel

Zone Thermostat
Exhaust Air
Return
Recirculated Air Air
Exhauster

Conditioned Air
Mixing DBT – 21 to 26°C
Box RH – 30 to 60 %
Fresh Air
Filter Unit Blower
Heating Coil Humidifier
Dampers Pre Heater

Water Source

Waste Heat from Geothermal


Pump, Solar Hot Water Unit,
Bio Mass Combuster Unit

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