EP2295736A2 - Installation pour la conversion de la chaleur résiduelle en énergie électrique - Google Patents
Installation pour la conversion de la chaleur résiduelle en énergie électrique Download PDFInfo
- Publication number
- EP2295736A2 EP2295736A2 EP10008824A EP10008824A EP2295736A2 EP 2295736 A2 EP2295736 A2 EP 2295736A2 EP 10008824 A EP10008824 A EP 10008824A EP 10008824 A EP10008824 A EP 10008824A EP 2295736 A2 EP2295736 A2 EP 2295736A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coolant
- cooling circuit
- sub
- closed
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002918 waste heat Substances 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 50
- 239000002826 coolant Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 20
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 12
- 239000008158 vegetable oil Substances 0.000 claims description 12
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 6
- 235000019198 oils Nutrition 0.000 claims description 6
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002540 palm oil Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/106—Ammonia
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
- C11B3/14—Refining fats or fatty oils by distillation with the use of indifferent gases or vapours, e.g. steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K15/00—Adaptations of plants for special use
Definitions
- An apparatus for converting waste heat from a production process into electrical energy An apparatus for converting waste heat from a production process into electrical energy.
- a disadvantage of this situation is the waste of a quantity of energy in the form of waste heat which increases the energy costs of the production process.
- the purpose of the present invention is to use the waste heat from industrial processes more efficiently by generating electrical energy without fossil fuels or emissions, whereby this electrical energy can be used in the same production process or in another application.
- the invention relates to an apparatus for converting waste heat from a production process into electrical energy, where the production process comprises a number of sub-processes, in which the waste heat from at least two sub-processes is simultaneously extracted from the production process by a single closed work-producing cooling circuit, and in which there is at least one heat exchanger for each sub-process in the form of an evaporator, with a primary section incorporated into the closed cooling circuit and a secondary section through which a fluid is taken from the sub-process concerned to evaporate the coolant in the closed cooling circuit, where at least one of the aforementioned heat exchangers has its secondary section incorporated into a cooling circuit of a sub-process that uses the same coolant, and whereby after cooling in the heat exchanger concerned the coolant is mixed with the coolant in the closed cooling circuit by means of a mixer followed by a closed mixing vessel (12) in which the fluid and gas phases of the coolant are separated, and there is a closed mixing vessel (12) in the closed cooling circuit (1) after the mixer (11) in which the liquid and
- a power source in the closed cooling circuit such as a turbine, to which a generator is connected to supply electrical energy, a condenser for cooling and condensing the coolant, and a drive means to circulate the coolant.
- a power source in the closed cooling circuit such as a turbine, to which a generator is connected to supply electrical energy, a condenser for cooling and condensing the coolant, and a drive means to circulate the coolant.
- An advantage of the present invention is that it is a reliable technology by which up to 25% of the waste heat can be converted into electrical energy by means of a single cooling circuit for a number of waste heat sources. Another advantage of the present invention is that no fossil fuels such as petroleum or natural gas are required to generate this electrical energy.
- Another advantage is that an investment according to the present invention in an industrial process can pay for itself in one to two years, depending on the dimensions of the production unit and the attainable efficiency of the waste heat conversion.
- a preferable embodiment is one that can be applied in the vegetable oil industry.
- the waste heat is recovered from both waste heat sources in a closed cooling circuit where, in parallel for each sub-process, one heat exchanger in the form of an evaporator with a primary section incorporated in the cooling circuit and a secondary section through which a fluid is guided, originating from the sub-process concerned, to evaporate the coolant in the cooling circuit.
- the cooling circuit contains a turbine as a power source, to which a generator is connected, a condenser for cooling and condensing the coolant, and a drive means to circulate the coolant, and to partly convert the waste heat into electrical energy.
- the apparatus shown in figure 1 consists of a cooling circuit 2 with ammonia as a coolant, for example, that contains an evaporator 3 and a heat exchanger 4, a turbine 6 connected to an electrical power source 7, and further a condenser 8.
- the ammonia circuit is connected via a mixer 11 and a mixing vessel 12. From the mixing vessel 12 ammonia is pumped back 13 to the heat exchanger 4, but is also taken further to an ice condenser 5, via a compressor (not shown).
- the temperatures given in figure 1 are indicated with symbols. These symbols indicate the following temperatures in this case, but these symbols are not limited to these temperatures:
- the apparatus for converting waste heat from a production process is used in the vegetable oil production process, where the operation of the integrated waste heat conversion of two waste heat sources can be explained as follows.
- the production process is a process for producing vegetable oil, in which the oil extracted from plants is refined in a first sub-process at high temperature by passing steam in a deodoriser through the oil, whereby the heat released by cooling the deodorised oil is at least partly converted into electrical energy via a first heat exchanger 4, and whereby the steam used for deodorising is taken from the deodoriser to an ice condenser that condenses the steam supplied to ice via a second sub-process that exchanges heat with the closed cooling circuit 2 via a second heat exchanger 3.
- the deodoriser raises the vegetable oil to a temperature of around 250°C. After refinement, the vegetable oil has to be cooled to a temperature of 30°C for soft oils or to 50°C for palm oil to enable transport and storage.
- Ammonia is heated and evaporated with the waste heat from both sources, after which the two ammonia flows of 72°C are combined to drive a turbine 6 connected to an electrical power source 7 for electricity generation.
- the spent ammonia is brought back to its low output temperature via a condenser 8, connected to an external coolant 9, and recycled as a coolant for both cooling processes, i.e. the cooling of the ammonia from the ice condenser, and the cooling of the refined vegetable oil, the end product of the industrial process.
- Figure 2 shows the efficiency of the waste heat conversion in the form of a graph, in which the efficiency is expressed as the percentage of the waste heat that is converted to electrical energy at different temperatures of the waste heat sources and at different temperatures of the coolant in the closed cooling circuit.
- the efficiency, i.e. the percentage of the waste heat that is recovered as electrical energy, of this conversion circuit 1 depends on the temperature of the waste heat sources and the temperature of the cooled coolant. For example, the efficiency of the circuit for a waste heat source of 100°C is already 18% if the temperature of the coolant is brought to -30°C, and it rises to 22% for a waste heat source of 150°C in the same conditions, as shown in figure 2 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE2009/0518A BE1018868A3 (nl) | 2009-08-26 | 2009-08-26 | Inrichting voor de conversie van afvalwarmte van een productieproces naar elektrische energie. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2295736A2 true EP2295736A2 (fr) | 2011-03-16 |
| EP2295736A3 EP2295736A3 (fr) | 2011-04-27 |
| EP2295736B1 EP2295736B1 (fr) | 2012-09-19 |
Family
ID=42286677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20100008824 Not-in-force EP2295736B1 (fr) | 2009-08-26 | 2010-08-25 | Installation pour la conversion de la chaleur résiduelle en énergie électrique |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2295736B1 (fr) |
| BE (1) | BE1018868A3 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2076062B (en) * | 1980-05-16 | 1984-04-26 | English Electric Co Ltd | Turbine power plant |
| DE3227669C1 (de) * | 1982-07-23 | 1983-07-07 | Hermann Dr. 4400 Münster Stage | Verfahren und Anlage zum Desodorieren und/oder Entsaeuern von Speiseoelen,Fetten und Estern |
| EP0775250A1 (fr) * | 1994-07-04 | 1997-05-28 | Georg Rauscher | Moteur thermique a basse temperature, moteur a basse temperature |
| FR2885169A1 (fr) * | 2005-04-27 | 2006-11-03 | Renault Sas | Systeme de gestion de l'energie calorifique a bord d'un vehicule comportant un circuit a cycle de rankine |
| DE102006043835A1 (de) * | 2006-09-19 | 2008-03-27 | Bayerische Motoren Werke Ag | Wärmetauscheranordnung |
| DE102006057448A1 (de) * | 2006-12-06 | 2008-06-12 | Ibb Technology Gmbh | Verfahren zur Erhöhung von Leistung und Wirkungsgrad im ORC-Kraftwerksprozess |
-
2009
- 2009-08-26 BE BE2009/0518A patent/BE1018868A3/nl not_active IP Right Cessation
-
2010
- 2010-08-25 EP EP20100008824 patent/EP2295736B1/fr not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| None |
Also Published As
| Publication number | Publication date |
|---|---|
| BE1018868A3 (nl) | 2011-10-04 |
| EP2295736A3 (fr) | 2011-04-27 |
| EP2295736B1 (fr) | 2012-09-19 |
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