37
CHAPTER
9
Model selection and capacity calculation
Definition of each air flow name used in following calculation
Definition of the text box
Lossnay unit
Dx-coil unit
Outdoor unit
Refrigerant pipe
Exhaust air
Outdoor air
Return air
Supply air
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.
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
200 m
2
5 m
2
/person
25 m
3
/h
•
person
0.2 person/m
2
40 people
1000 m
3
/h
170Pa
Adequate Lossnay model
LGH-100RVX-E
(A) Floor space
(B) Required fresh air rates
(C) Floor space per person
(D) The number of people per 1 m
2
= 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
Summary of Contents for GUG-01SL-E
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