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Public Halls (facilities Such As Day-care Centers - Mitsubishi Electric Lossnay series Technical Manual

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6. Public Halls (Facilities Such as Day-care Centers)

6.1 System Design Challenges
For buildings located near airports and military bases, etc., that required soundproofing, air conditioning and ventilation
facilities had conventionally been of the centralized type. However, independent dispersed air conditioning and ventilation
systems had been necessary due to the need for zone control, as well as for energy conservation purposes. The system
detailed below was a plan for these types of buildings.
System Design
Building specifications : Two floors above ground floor, Total floor space: 4,150 ft
Application
: GF Study rooms (two rooms), office, day-care room, lounge
2F . . . . . Meeting room
Air conditioning : GF Air-cooling heat pump chiller and fan coil unit
2F . . . . . Air-cooling heat pump package air conditioner
Ventilation
: Ceiling-embedded Lossnay unit
6.2 System Requirements
(1) Conventional systems used centralized units with air-handling units, and air conditioning and ventilation were performed together.
(2) Topics
1) Special knowledge was required for operation, and there were problems in response to the users' needs.
2) When the centralized method was used, the air even in rooms that were not being used was conditioned, increasing
operation costs.
3) Machine room space was necessary.
4) Duct space was necessary.
6.3 Details
(1) Air-conditioning Facilities
1) Small rooms
: Air-cooling heat pump chiller and fan coil unit combination
2) Meeting rooms : Single duct method with air-cooling heat pump package air conditioner
(2) Ventilation Facilities
1) A ceiling-embedded-type Lossnay unit was used in each room, and a silence chamber, silence-type supply/return
grille, silence duct, etc. was incorporated on the outer wall to increase the total soundproofing effect.
6.4 Outcome
(1) Operation was possible without special training, so system management was easy.
(2) Zone operation was possible, and was thus energy-saving.
(3) Soundproof ventilation was possible with the separately installed ventilators.
(4) Energy saving ventilation was possible with the energy recovery ventilation.
(5) Ceiling-embedded-type Lossnay unit saved space.
Ground Floor Layout
Machine room
Kitchenette
PAC
Stairway
LS
FCU
Lounge
Study room
FCU
LS
Toilet
Day-care room
Hall
Foyer
Study room
CHAPTER 6
Examples of Lossnay Applications
2
(385 m
PAC
LS
FCU
LS
2
)
2F Layout
Meeting room
U-69

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