Mitsubishi Electric GUG-01SL-E Technical Manual page 40

Direct expansion coil unit for lossnay, lossnay return air and supply air temperature control
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9
Model selection and capacity calculation
CHAPTER
Definition of each air flow name used in following calculation
Outdoor air
Exhaust air
Outdoor unit
Definition of the text box
Example 1-1 : Cooling for an office floor by RA temperature control
Following calculations are just examples.
The floor is assumed that it is south-facing middle floor of typical office building in Tokyo.
In the actual designing, please calculate in an appropriate way.
STEP1. Calculation of required cooling capacity
I : Calculation of required ventilation air volume and selection of Lossnay unit
(A) Floor space
(B) Required fresh air rates
(C) Floor space per person
(D) The number of people per 1 m
= The reciprocal number of floor space per person
(E) The number of person in the floor
= (A) / (C) = 200 / 5
= (A) x (D) = 200 x 0.2
(F) Required fresh air volume
= (B) x (E) = 25 x 40
(G) Required static pressure
Adequate Lossnay model
37
Lossnay unit
Refrigerant pipe
Lossnay outlet air = Dx-coil inlet air
Example values are filled in this normal box for each situation.
Change each value for the actual designing.
Especially, hatching one indicates important value such as calculation result.
Dashed line one means fixed value e.g. physical property value.
Not necessary to change for the actual designing.
2
LGH-100RVX-E
Return air
Dx-coil unit
200 m
2
person
25 m
/h
3
5 m
/person
2
0.2 person/m
2
40 people
1000 m
/h
3
170Pa
Supply air

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