introduction advanced energy recovery heat pump for the engineering science and research building...
TRANSCRIPT
Introduction
• Advanced energy recovery heat pump for the Engineering Science and Research Building (ESRB).
• ESRB uses 54,000 CFM of 100% make-up air 24 hours a day 7 days a week.
• This amount of ventilation air is required by OSHA.
• No energy recovery system is presently installed.
What is a Heat Pump and How Does it Work?
• A basic heat pump consists of 4 components.
– Compressor– Condenser Coil– Evaporator Coil– Expansion Valve
• Used to transfer energy from the exhaust air to the make-up air.
• Our system will use a DX heat pump system.
What Makes This System Advanced?
• The compressor in this system will be a Turbocor TT400.
• The TT400 is a centrifugal compressor capable of 160 tons of cooling.
• Utilizes magnetic bearings which eliminates the need for oil.
• Capable of high COP’s which leads to higher efficiency and cheap operation.
• Maintains high efficiency even at low loads.
Water-Glycol Heat Recovery System
• Plans for a water-glycol heat recovery system were made but the system was never installed.
• Exhaust ducts were designed to accept heat recovery coils.
Exhaust Air Duct
Why a DX System?
• Latent heat of vaporization
Performance Comparison of Heat Recovery Systems
0.00
50.00
100.00
150.00
200.00
250.00
-10 0 10 20 30 40 50 60
Outdoor Air Temperature (F)
Lo
ad (
To
ns)
Required load
W-G system
D-X system
Economic Comparison of Heat Recovery Systems
$0.00
$1.00
$2.00
$3.00
$4.00
$5.00
$6.00
-10 -5 0 5 10 15 20 25 30 35 40 45
Outside Air Temperature (F)
Sav
ing
s (
do
llars
/hr)
D-X system
W-G system
24,000 dollars/year
Environmental Comparison of Heat Recovery Systems
0.00
2.00
4.00
6.00
8.00
10.00
12.00
-10 -5 0 5 10 15 20 25 30 35 40 45
Outside Air Temperature (F)
Sav
ing
s (g
allo
ns/
ho
ur)
W-G system
D-X System
30,000 gallons/year