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Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Heat Recovery by Heat Pumps in Heat Recovery by Heat Pumps in Supermarkets Refrigeration SystemsSupermarkets Refrigeration Systems
Jaime AriasDiv. of Applied Thermodynamics and Refrigeration
Dept. of Energy TechnologyRoyal Institute of Technology
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
ContentsContents
1.- Introduction.
2.- Heat Recovery, Floating Condensing and Heat Pump.
3.- Supermarket COOP Forum Birsta
4.- Comparison between Floating Condensing Floating Condensing with Heat Pump.
5.- Conclusions.
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
1.- Introduction.
Heat Recovery from the condensers is a good possibility to decrease the heating costs in supermarkets .
Energy-saving technologies as heat recovery and floating condensing temperature, have been implemented in several supermarkets in Sweden to save energy.
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
1.- Introduction.
An option to heat recovery is floating condensing pressure that decrease the energy consumption of the refrigeration temperature at lower outdoor temperatures.
Another option to heat recovery is floating condensing pressure and a Heat Pump connected to the coolant fluid loop.
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Heat recoverySystem 3
Chiller
Dry cooler
Heatexchanger Auxiliary
heat
HVAC System
Heatexchanger
Supply air
32°C36°C
Sale Area
Cabinets
-8°C
-4°C
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Sala - Hedemora Aug 2000 - Feb 2001
-40
-20
0
20
40
60
80
2000-08 2000-09 2000-10 2000-11 2001-01 2001-02Time
tem
p[°C
], R
H[%
]
Indoor Temp. Hedemora Outdoor temp. HedemoraRH. Hedemora Indoor Temp. SalaRH. Sala Outdoor Temp. Sala
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Floating Condensing System
Chiller
Dry Cooler
HeatingSystem
HVAC System
HeatExchanger
Supply Air
CondensingTemperature8°C to 40°C
Sales Area
Cabinets
-8°C
-4°C
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
-40 -35 -30 -25 -20 -15 -100
1
2
3
4
5
6
7
T2 [°C]
COP2
T1=40°C
T1=30°C
T1=20°C
T1=10°C
T1=50°C
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Floating Condensing System andHeat Pump
Chiller
Dry Cooler
HeatingSystem
HVAC System
Supply Air
CondensingTemperature15°C to 40°C
Sales Area
Cabinets
-8°C
-4°C
Heat Pump55°C
40°C
Auxiliary
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
COOP Forum Birsta in Sundsvall
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
COOP Forum Birsta in Sundsvall
Total Area : 8000 m2
Area
Medium Temp. Level : 260 kW
Low Temp. Level : 60 kW
Refrigeration capacity
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
COOP Forum Birsta in Sundsvall
Energy No Heat Recovery or Heat Recovery Floating Condensing Floating CondensingFloating Condensing and Heat Pump
MWh/year MWh/year MWh/year MWh/yearTotal Electricity 2900 2800 2400 2400
Total Heat 850 200 850 330 (210 +120)
Total Energy (el+heat) 3750 3000 3250 2830
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
COOP Forum Birsta in Sundsvall
Cost No Heat Recovery or Heat Recovery Floating Condensing Floating CondensingElectricity: 0.1 EUR/kWh Floating Condensing and Heat PumpDist. Heating: 0.06 EUR/kWh
EUR/year EUR/year EUR/year EUR/yearTotal Electricity 290000 280000 240000 240000
Total Heat 51000 12000 51000 28000
Total Energy (el+heat) 341000 292000 291000 268000
Savings 49000 50000 73000
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
COOP Forum Birsta in Sundsvall
COOP COOP BirstaBirsta
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden
5.- Conclusions
According with CyberMart the highest potential of energy saving is achieved from using a system with Floating Condensing Temperature and a Heat Pump.
The influence of the outdoor temperature on the indoor relative humidity of air is an important factor to take into consideration for design of Heat Recovery or Heat Pump in Supermarkets.
Jaime Arias Dept. of Energy Technology
Royal Institute of TechnologySweden