Mitsubishi Electric Lossnay LGH-15RX3 Technical Manual page 30

(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
(%) to 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 =
G
Outdoor air load with Lossnay
G
=
Heat recovered =
G
Heating
= Heat recovered: kW × Unit price ¥/kWh ×
operation time Hr/year =
= Hr/year
=
CHAPTER 3 G General Technical Considerations
= Air specific gravity × outdoor air volume
× (outdoor air enthalpy – indoor enthalpy)
=
= Outdoor air load (q
× ( 1 – enthalpy recovery efficiency)
=
or
= Air specific gravity × fresh air volume
× (indoor blow enthalpy – indoor enthalpy)
= q
=
=
or
= Outdoor air load (q
× enthalpy recovery efficiency
W = % Outdoor air load =
G
Outdoor air load with Lossnay
G
W = % =
W = % Heat recovered =
G
= Heat recovered: kW × Unit price ¥/kWh ×
kW × ¥/kWh ×
operation time Hr/year =
= Hr/year
=
Cooling
)
1
– q
1 2
–
)
1
W =
W =
W =
Cooling
kW ×
%
%
%
¥/kWh ×
27