Mitsubishi Electric Y Series Manual page 183

Indoor Air Quality Inside a Building is Optimized Through
Temperature and Humidity Exchange by Lossnay
Lossnay is a total heat exchange ventilation system that uses paper
characteristics to perform temperature (sensible heat) and humidity
(latent heat) exchange.
The concept of sensible heat and latent heat exchange
using a Lossnay core
Outside
Exhaust air outlet (EA)
Outdoor air intake (OA)
What can be Improved by Introducing Lossnay?
• Ventilation with maximized comfort
In summer
Air similar to the conditions of cooled (dehumidified)
indoor air is supplied.
Supply air
Lossnay
Dry bulb temperature (ºC) 28
Absolute humidity (g/kg'(DA)) 13.3
Relative humidity (%) 56
Enthalpy (kJ/kg(DA)) 62.1
Total energy recovery (kW) 7.5
Outdoor air load (kW) 3.1
Outdoor air load ratio (%) 29
Return air
Dry bulb temperature 26ºC
Absolute humidity 10.5g/kg'(DA)
Air
conditioner
Relative humidity
Enthalpy 52.9kJ/kg(DA)
Indoor supply air Outdoor Outdoor
_
=
temperature (ºC) temperature (ºC) temperature (ºC)
Calculation example: 28ºC = 33ºC _ (33ºC _ 26ºC) × 71.5%
*The above applies to LGH-100RVX (fan speed 4).
Inside
Return air (RA)
Supply air (SA)
Conventional
ventilator
33
20.1
Exhaust air
63
84.6
0
10.6
100
Outdoor air
Dry bulb temperature 33ºC
Absolute humidity 20.1g/kg'(DA)
50% Relative humidity 63%
Enthalpy 84.6kJ/kg(DA)
Indoor Temp. recovery
_
×
temperature (ºC) efficiency (%)
LGH-RVX/RVXT Series / GUF Series
Lossnay ventilation systems are renowned
industry-wide for their efficiency.
They offer environmentally friendly energy
recovery and humidity control, and enable
air-conditioning systems to simultaneously
provide optimum room comfort and energy
savings.
EA
OA
In winter
Air similar to the conditions of heated (humidified)
indoor air is supplied.
Supply air
Lossnay
Dry bulb temperature (ºC) 16
Absolute humidity (g/kg'(DA)) 5.2
Relative humidity (%) 46
Enthalpy (kJ/kg(DA)) 29.2
Total energy recovery (kW) 8.2
Outdoor air load (kW) 3.1
Outdoor air load ratio (%) 28
Return air
Dry bulb temperature
Absolute humidity 7.3g/kg'(DA)
Air
conditioner
Relative humidity
Enthalpy 38.5kJ/kg(DA)
Indoor supply air Indoor
_
=
temperature (ºC) temperature (ºC)
Calculation example: 16ºC = (20ºC _ 0ºC) × 80% + 0ºC
*The above applies to LGH-100RVX (fan speed 4).
SA
Conventional
ventilator
0
1.9
Exhaust air
50
4.7
0
11.3
100
Outdoor air
20ºC Dry bulb temperature
Absolute humidity 1.9g/kg'(DA)
50% Relative humidity
Enthalpy 4.7kJ/kg(DA)
Outdoor Temp. recovery Outdoor
× +
temperature (ºC) efficiency (%) temperature (ºC)
183
RA
0ºC
50%