# Calculating Lossnay Cost Savings - Mitsubishi Electric Lossnay series Technical Manual

For north america.

CHAPTER 3
General Technical Considerations

## 2. Calculating Lossnay Cost Savings

Use the following pages to assess the economical benefits of using the Lossnay in particular applications.
(1) Conditions
Return air volume (RA)
Outdoor air volume (OA) =
Air volume ratio (RA/OA) =
Air conditions
Season
Dry bulb
temp.
Item
DB
[°F]
[°C]
Outdoors
Indoors
Operation time: Heating =
Cooling =
Energy:
Heating = Type: Electricity
Cooling = Type: Electricity
Power rates: Winter:
(2) Lossnay Model
Model name:
Processing air volume per unit RA =
Energy recovery efficiency : Energy recovery efficiency
Static pressure loss (unit-type) RA=
Power consumption (pack-type) = none because of unit type
(3) Indoor Blow Air Conditions
[°F]
Temperature
[°C]
[Btu/lb]
Enthalpy
[kJ/kg]
Data obtained from
above equation
and
psychrometric chart
U-24
3
=
CFM (m
/hr)
3
CFM (m
/hr)
Winter Heating
Wet bulb
Relative
Absolute
temp.
humidity
humidity
WB
RH
×
[°F]
[%]
[Ib/Ib']
[°C]
[%]
[kg/kg']
hours/day ×
hours/day ×
dollar/kWh
CFM (m
3
/hr), OA =
Enthalpy recovery efficiency (cooling) =
Enthalpy recovery efficiency (heating) =
Pa OA =
Heating
=
(Indoor temperature – outdoor air temperature) ×
energy recovery efficiency + outdoor air
temperature
=
=
(Indoor enthalpy – outdoor air enthalpy) ×
enthalpy recovery efficiency + outdoor air
enthalpy
=
Dry-bulb temperature
Wet-bulb temperature
Relative humidity
Absolute humidity
Enthalpy
Enthalpy
Dry bulb
i kJ/kg
temp.
DB
(Btu/Ib)
[°F]
(kcal/kg')
[°C]
days/month ×
days/month ×
Cost:
Cost:
Summer:
CFM (m
3
/hr), Air volume ratio (RA/OA) =
=
%,
%,
%
Pa (Note: Each with filters)
=
Outdoor air temperature – (outdoor air
temperature – indoor temperature) ×
energy recovery efficiency
=
=
Outdoor air enthalpy – (outdoor air
enthalpy – indoor enthalpy) ×
enthalpy recovery efficiency
=
=
°F (°C)
Dry-bulb temperature
=
°F (°C)
Wet-bulb temperature
=
%
Relative humidity
=
Ib/Ib' (kg/kg')
Absolute humidity
=
Btu/Ib (kg/kg)
Enthalpy
Summer Cooling
Wet bulb
Relative
Absolute
temp.
humidity
humidity
WB
RH
×
[°F]
[%]
[Ib/Ib']
[°C]
[%]
[kg/kg']
months/year =
hours/year
months/year =
hours/year
dollar/kWh
dollar/kWh
dollar/kWh
Cooling
=
=
=
=
=
Enthalpy
i kJ/kg
(Btu/Ib)
(kcal/kg')
CFM (m
3
/hr)
°F (°C)
°F (°C)
%
Ib/Ib' (kg/kg')
Btu/Ib (kg/kg)