In this paper, an innovative system combining a heat pump (HP) and an organic Rankine cycle (ORC) process is proposed. This system is integrated with a solar roof, which is used as a thermal source to provide heat in winter months (HP mode) and electricity in summer months (ORC mode) when an excess irradiation is available on the solar roof. The main advantage of the proposed unit is its similarity with a traditional HP: the HP/ORC unit only requires the addition of a pump and four-way valves compared to a simple HP, which can be achieved at a low cost. A methodology for the optimal sizing and design of the system is proposed, based on the optimization of both continuous parameters such as heat exchanger size or discrete variables such as working fluid. The methodology is based on yearly simulations, aimed at optimizing the system performance (the net yearly power generation) over its whole operating range instead of just nominal sizing operating conditions. The simulations allow evaluating the amount of thermal energy and electricity generated throughout the year, yielding a net electric power output of 3496 kWh throughout the year.

References

References
1.
Bettgenhäuser
,
K.
,
Offermann
,
M.
,
Boermans
,
T.
,
Bosquet
,
M.
,
Grözinger
,
J.
,
von Manteuffel
,
B.
, and
Surmeli
,
N.
,
2013
, “
Heat Pump Implementation Scenarios Until 2030: An Analysis of the Technology's Potential in the Building Sector of Austria, Belgium, Germany, Spain, France, Italy, Sweden and the United Kingdom
,” ECOFYS Germany GmbH, Köln, Germany, ECOFYS Report, Project No. BUIDE12080.
2.
Quoilin
,
S.
,
van Den Broek
,
M.
,
Declaye
,
S.
,
Dewallef
,
P.
, and
Lemort
,
V.
,
2013
, “
Techno-Economic Survey of Organic Rankine Cycle (ORC) Systems
,”
Renewable Sustainable Energy Rev.
,
22
, pp.
168
186
.
3.
Persson
,
J. G.
,
1990
, “
Performance Mapping Versus Design Parameters for Screw Compressors and Other Displacement Compressor Types
,” Screw Machine ‘90: Screw Compressors, Screw Loader, Screw Motors: Conference Dortmund, Dusseldorf, Germany, Oct. 2–3, VDI-Berichte 859, pp. 15–31.
4.
Schimpf
,
S.
, and
Span
,
R.
,
2015
, “
Simulation of a Solar Assisted Combined Heat Pump—Organic Rankine Cycle-System
,”
Energy Conver. Mangmnt.
,
102
, pp.
151
160
.
5.
Zanelli
,
R.
, and
Favrat
,
D.
,
1994
, “
Experimental Investigation of a Hermetic Scroll Expander–Generator
,”
12th International Compressor Engineering Conference
, West Lafayette, IN, July 19–22, pp.
459
464
.
6.
Quoilin
,
S.
,
2011
, “
Sustainable Energy Conversion Through the Use of Organic Rankine Cycles for Waste Heat Recovery and Solar Applications
,” Ph.D. thesis, University of Liège, Liège, Belgium.
7.
Thonon
,
B.
,
1995
, “
Recent Research and Developments in Plate Heat Exchangers
,”
Fuel Energy Abstr.
,
36
(
5
), p.
361
.
8.
Kuo
,
W. S.
,
Lie
,
Y. M.
,
Hsieh
,
Y. Y.
, and
Lin
,
T. F.
,
2005
, “
Condensation Heat Transfer and Pressure Drop of Refrigerant R-410A Flow in a Vertical Plate Heat Exchanger
,”
Int. J. Heat Mass Transfer
,
48
(
25–26
), pp.
5205
5220
.
9.
Hsieh
,
Y. Y.
, and
Lin
,
T. F.
,
2002
, “
Saturated Flow Boiling Heat Transfer and Pressure Drop of Refrigerant R-410A in a Vertical Plate Heat Exchanger
,”
Int. J. Heat Mass Transfer
,
45
(
5
), pp.
1033
1044
.
10.
CEN
,
2005
, “
Refrigerant Compressors—Rating Conditions, Tolerances and Presentation of Manufacturer's Performance Data
,”
European Committee for Standardization
,
Bruxelles, Belgium
, European Standard EN 12900:2005:E.
11.
Emerson Climate Technologies
,
2015
, “
Selection Software
,” Emerson Climate Technologies GmbH, Aachen, Germany, accessed Apr. 15, 2015, http://selectonline.emersonclimate.eu/
12.
Lemort
,
V.
,
Declaye
,
S.
, and
Quoilin
,
S.
,
2011
, “
Experimental Characterization of a Hermetic Scroll Expander for Use in a Micro-Scale Rankine Cycle
,”
Proc. Inst. Mech. Eng., Part A
,
226
(
1
), pp.
126
136
.
13.
Lemort
,
V.
,
2009
, “
Contribution to the Characterization of Scroll Machines in Compressor and Expander Modes
,” Ph.D. thesis, University of Liège, Liège, Belgium.
14.
Quoilin
,
S.
,
Declaye
,
S.
,
Tchanche
,
B. F.
, and
Lemort
,
V.
,
2011
, “
Thermo-Economic Optimization of Waste Heat Recovery Organic Rankine Cycles
,”
Appl. Therm. Eng.
,
31
(
14–15
), pp.
2885
2893
.
15.
Kreider
,
J. F.
,
Curtiss
,
P.
, and
Rabl
,
A.
,
2009
,
Heating and Cooling of Buildings
,
2nd ed.
,
McGraw-Hill
,
New York
.
You do not currently have access to this content.