36
CHAPTER
9
Model selection and capacity calculation
In this chapter, the calculation ways to select Lossnay unit, Dx-coil unit and outdoor unit are explained.
Follow each steps shown in the flow chart below to select adequate units.
The model selection and the capacity calculation are partly available on “New Design-Tool
(version 1.70)
” .
Flow chart for model selection
Start
Calculation of required cooling / heating capacity
•
Calculation of required ventilation volume
•
Selection of Lossnay unit
•
Calculation of cooling/heating load
•
Calculation of Lossnay energy recovery
Selection of Dx-coil unit system
•
Selection of Dx-coil unit
•
Selection of RA temperature control or SA temperature control
•
Selection of outdoor unit
STEP2
STEP3-1
STEP4
STEP3-2
STEP3-3
Yes
Yes
Yes:
RA temperature control
Cooling
No
No: Heating
No:
No: SA temperature control
STEP1
Use Dx-coil?
Use RA temp. control?
Design by capacity?
Design by cooling?
Example1-1 is for cooling, see page 37.
Example1-2 is for heating, see page 43.
Example2-1 is for cooling, see page 47.
Example2-2 is for heating, see page 51.
Example3-1 is for cooling, see page 53.
Example3-2 is for heating, see page 55.
Calculation of
Dx-coil unit
heating capacity
Calculation of
Dx-coil unit
cooling capacity
Selection of
DX-coil unit by
supply air temperature
Select the correct capacity air conditioning
Comparison of L Dx-coil unit capacity with required capacity
Application example 1: Supplemental Air-conditioning system for an office floor by RA temperature control
Application example 2: Main Air-conditioning system for a school classroom or a meeting room by RA temperature control
Application example 3: Outdoor air treatment for an office floor by SA temperature control
Yes:
Summary of Contents for GUG-01SL-E
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