Large Office Building - Mitsubishi Electric Lossnay LGH-100RX3-CAN Technical Manual

CHAPTER 6 Examples of Lossnay Applications
Lossnay ventilation systems are proposed for eight types of applications in this chapter. These systems are planned for
Japanese use, and actual systems will differ according to each country. These should be used only as reference.

1. Large Office Building

1.1 System plan points
Conventional central systems in large buildings, run in floor and building ducts, have generally been preferred to individual
room units. Thus, air conditioning and ventilation after working hours was not possible.
In this plan, an independent dispersed ventilation method has been applied to resolve this problem. Such a system's main
advantage is that it allows 24-hour operation.
A package-type air conditioning unit is installed in the ceiling, and ventilation is performed with the ceiling-embedded-type
Lossnay. Ventilation in the toilet, kitchenette and lift halls, etc., is performed with a straight centrifugal fan.
Setting outline
Building form : Basement floor SRC (Slab Reinforced Concrete), 8 floors above ground S construction
Total floor space 30,350 m
Basement : Employee cafeteria
Ground floor : Lobby, conference room
2 to 7th floor : Offices, salons, board room
Air conditioning : Package air conditioning
Ventilation : Ceiling embedded-type Lossnay, straight centrifugal fan
1.2 Current topics
(1) Operation system that answers individual needs is required.
Free independent operation system
Simple control
(2) Effective use of floor space
(elimination of machine room)
(3) Application to Building Management Laws
Effective humidification
Elimination of indoor dust
(4) Energy conservation
1.3 Proposed details
(1) Air conditioning
In general offices, the duct method will be applied with
several ceiling-embedded multiple cooling heat pump
packages in each zone to allow total zone operation.
Board rooms, conference rooms and salons will be air
conditioned with a ceiling embedded-type or cassette-type
multiple cooling heat pump package in each room.
66
2
Installation state of office system air conditioning system
– The air supplied from the Lossnay is introduced into
the intake side of the air conditioner, and the room stale
air is directly removed from the inside of the ceiling.
Return grille
Inspection
SA (Supply air)
Air conditioner
Lossnay
Supply grille
RA (Return air)
Air conditioner
Lossnay
Grille
SA (Supply air to room)
EA
(Exhaust
space
air)
Inspection
hole
OA
Suspension bolt (Outdoor
position
air
suction)
EA
Suspension bolt
(Exhaust
air)
OA
(Outdoor
Inspection hole air
suction)