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(4) Outdoor air load and heat recovery
Fresh air load without
Lossnay (q
)
1
Outdoor air load with
Lossnay (q
)
2
Heat recovery (q
)
3
Outdoor air load (%)
(5) Recovered money (power rates)
Yearly saved money
(¥)
Heating
= Air specific gravity × outdoor air volume
× (indoor enthalpy – outdoor air enthalpy)
=
= Outdoor air load (q
)
1
× ( 1 – enthalpy recovery efficiency)
=
or
= Air specific gravity × outdoor air volume
× (indoor enthalpy – indoor blow enthalpy)
= q
– q
1
2
=
–
=
or
= Outdoor air load (q
)
1
× enthalpy recovery efficiency
Outdoor air load =
Outdoor air load with Lossnay
=
Heat recovered =
Heating
= Heat recovered: kW × Unit price ¥/kWh ×
operation time Hr/year =
= Hr/year
=
CHAPTER 3
General Technical Considerations
= Air specific gravity × outdoor air volume
=
= Outdoor air load (q
=
= Air specific gravity × fresh air volume
= q
=
=
= Outdoor air load (q
W =
%
W =
%
W =
%
= Heat recovered: kW × Unit price ¥/kWh ×
kW ×
¥/kWh ×
= Hr/year
=
Cooling
× (outdoor air enthalpy – indoor enthalpy)
)
1
× ( 1 – enthalpy recovery efficiency)
or
× (indoor blow enthalpy – indoor enthalpy)
– q
1
2
–
or
)
1
× enthalpy recovery efficiency
Outdoor air load =
Outdoor air load with Lossnay
=
Heat recovered =
Cooling
operation time Hr/year =
W =
%
W =
%
W =
%
kW ×
¥/kWh ×
27
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