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Air conditioning systems
Published in Paul Tymkow, Savvas Tassou, Maria Kolokotroni, Hussam Jouhara, Building Services Design for Energy-Efficient Buildings, 2020
Paul Tymkow, Savvas Tassou, Maria Kolokotroni, Hussam Jouhara
The primary air fan coil system is very similar to the induction system. The only difference is in the terminal unit, where the induction unit is replaced by the fan coil unit. The fan coil unit basically consists of a filter, a finned tube coil and a centrifugal fan. Sometimes two coils are used: a hot water coil and a cold water coil. The fan runs continuously and recirculates air from the space through the coil, which is supplied with either hot or cold water. The primary air can be supplied directly to the space or through the fan coil unit. When the air is supplied directly to the space, low-velocity distribution can be used, resulting in savings in fan power. The supply temperature, however, should be maintained high enough to avoid cold drafts in the conditioned space.
Heating, Ventilating and Air Conditioning Systems
Published in Stephen A. Roosa, Steve Doty, Wayne C. Turner, Energy Management Handbook, 2020
Fan-coil units are typically used in buildings that have many zones located primarily along exterior walls, such as schools, hotels, apartments and office buildings. They are also an excellent choice for retrofitting air-conditioning into buildings with low floor-to-floor heights. Although four-pipe fan-coil systems can be used for buildings with high internal loads, a disadvantage is that cooling of interior zones in warm weather must use an active air-conditioning system since there is no supply of outside air to separately provide free cooling. They are also utilized to control the space temperature in laboratories where constant temperature make-up air is supplied to all spaces.
System Characteristics
Published in W. P. Jones, Air Conditioning Applications and Design, 2012
A fan coil unit comprises one or more fans, recirculating air from the room and blowing it over a cooler coil. The fans are driven by totally enclosed, single phase, permanent split capacitor motors, with absorbed powers in the range of 20–190 W. There are usually three possible running speeds, delivering airflow rates that are 100% at medium speed, about 83% at low speed and 118% at high speed. The driving motor absorbs about 75% power at low speed, 100% at medium speed and 140% at high speed. For a building of some size, it would be necessary to provide switchgear to give a random start for the fan coil units in the morning, when the air conditioning system was first switched on.
Techno-economic feasibility of a standalone hybrid energy system for semi equatorial climates: a case study
Published in International Journal of Green Energy, 2019
Mahdieh Arabzadeh Saheli, Kamran Lari, Seyed Babak Kasaeian Ziarati
A residential building located in Kish Island with an area of 3134.60 m2 is selected as the case study. The building has 10 stories, a lobby, and a parking garage. The electrical load of the building is determined using EnergyPlus software, developed by U.S. Department of Energy. The building specifications and materials are listed in Tables 1 and 2, respectively. Double-glazing transparent windows with a U-value of 1.96 W/m2K are used in the building. Split fan coil units are installed in the building for heating and cooling purposes. The electrical load includes exterior and interior lighting, facilities, and heating and cooling equipment.