CN103726882A - Oil supply system for organic Rankine cycle displacement expansion machine - Google Patents
Oil supply system for organic Rankine cycle displacement expansion machine Download PDFInfo
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- CN103726882A CN103726882A CN201410016432.1A CN201410016432A CN103726882A CN 103726882 A CN103726882 A CN 103726882A CN 201410016432 A CN201410016432 A CN 201410016432A CN 103726882 A CN103726882 A CN 103726882A
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Abstract
The invention discloses an oil supply system for an organic Rankine cycle displacement expansion machine, and belongs to the field of low-grade energy utilization. A working medium circulating loop is formed by connecting a condenser (1), a main pump (2), an evaporator (3), an oil separator (6) and an expansion machine (4) end to end in sequence by using working medium pipelines; a lubricating oil outlet of the oil separator (6) is connected with an oil injection hole of the expansion machine (4) by using an oil pipe; a mixture of organic Rankine cycle working medium and lubricating oil is injected into the pipeline. The oil supply system for the organic Rankine cycle displacement expansion machine is characterized in that the oil separator (6) is arranged between the evaporator (3) and the expansion machine (4), so that a lubricating oil pump can be omitted, and the influence on the output power of the expansion machine caused by the pressure loss of the oil separator can be reduced.
Description
Technical field
The present invention relates to a kind of organic Rankine circulation positive-displacement expansion engine lubricating oil supply system, belong to low-grade energy and utilize field.
Background technique
One of way of alleviating current environmental pollution and energy shortage problem is exactly to make full use of various residual heat resources, and develops the renewable energy sourcess such as geothermal power, solar energy.Organic Rankine circulating technology is because its system is simple, heat transfer efficiency advantages of higher is expected to be used widely.Decompressor is the critical component of organic Rankine circulation, and its performance is to organic Rankine cycle efficiency important.Decompressor for organic Rankine circulation is generally divided into two classes, and a kind of is speed mode decompressor, and such as radial turbines or axial turbomachinery, another kind is positive-displacement expansion engine, such as eddy type, screw type, reciprocating and sliding vane etc.Because positive-displacement expansion engine has, expansion ratio is large, efficiency is higher, rotating speed is low and can carry out the advantages such as two-phase expansion, and its development prospect is very good.But, positive-displacement expansion engine often need reliable lubricating oil supply system be lubricated, cooling and sealing.For the fuel feeding scheme for organic Rankine circulation positive-displacement expansion engine, conventionally have two kinds, the first is referring to accompanying drawing 1.This scheme is established oil separator in decompressor outlet, utilizes lubricating pump fuel feeding.Idiographic flow is for to enter oil separator from decompressor gas mixture out, and gas working medium enters condenser circulation, and the lubricant oil of separating pressurizes through oil pump, and reenters decompressor after being cooled.The shortcoming of this scheme is oil supply system more complicated, and the oil separator pressure loss is very large on the decompressor impact of exerting oneself, and cannot accomplish hermetically sealedly due to common oil pump, and this can make organic rankine cycle system leak aggravation.Alternative plan is shown in accompanying drawing 2.This scheme is not being established oil separator, and working medium and lubricant oil are all the time in admixture.Its shortcoming is that decompressor internal bearings, mechanical seal and other engagement place cannot obtain sufficient lubricant oil, and relevant position lacks effective Cooling and Lubricator, easily causes leaking the problems such as aggravation, serious wear and local overheating.
Summary of the invention
The object of the invention is to design a set of simple, reliable lubricating oil supply system for organic Rankine circulation positive-displacement expansion engine.
A kind of oil supply system for organic Rankine circulation positive-displacement expansion engine, condenser 1, main pump 2, vaporizer 3, oil separator 6, decompressor 4 are connected in turn from beginning to end and form working medium circulation loop with working medium pipeline in turn, between oil separator 6 lubricating oil outlets and the oil hole of decompressor 4, with oil pipe, connect, in pipeline, fill organic working medium and oil mixture; The liquefied mixture of organic Rankine cycle fluid and oil mixture enters vaporizer 3 after main pump 2 pressurizations, become gaseous state, and lubricant oil is liquid from vaporizer 3 organic Rankine cycle fluid out; Gaseous state organic Rankine cycle fluid and liquid lubricant oil enter oil separator 6, and the liquid lubricant oil of separating from oil separator 6 injects in decompressor 4; Gaseous state organic Rankine cycle fluid and the lubricant oil of from decompressor 4, discharging enter condenser 1, and organic Rankine cycle fluid is condensed into after liquid state, enter main pump 2 pressurizations circulation again together with liquid lubricant oil.
The liquid lubricant oil of be also connected with oil cooler 7 between oil separator 6 lubricating oil outlets and the oil hole of decompressor 4, separating from oil separator 6 injects decompressor 4 after oil cooler 7 is cooling.
Oil separator 6 is cyclone separating or filter core separated type.
The topmost feature of this system is placed in lubricating oil separator between decompressor and vaporizer exactly.From vaporizer out be the mixture of high pressure organic working medium saturated air and liquid lubricant oil, enter after oil separator, gaseous state organic working medium enters decompressor acting, and the lubricant oil that oil separator is separated is due in high pressure conditions, without oil pump, can directly inject the sealing of decompressor internal mechanical, bearing and other needs lubricant oil and cooling position.In this oil circuit, also can set up an oil cooler, can better carry out cooling relevant position like this.From decompressor, discharge and to have the mixture of low-pressure liquid lubricant oil and organic working medium (may be gaseous state or gas-liquid two-phase) to enter condenser, be all condensed into after liquid by main pump and pressurize and enter again vaporizer and again circulate.
In the oil supply system of the present invention's design, benefit of the present invention is: oil supply system is simple, without oil pump; The impact that the oil separator pressure loss is exerted oneself on decompressor greatly reduces.
Accompanying drawing explanation
Accompanying drawing 1, traditional fuel system one schematic diagram;
Accompanying drawing 2, traditional fuel system two schematic diagrams;
Accompanying drawing 3, fuel system system diagram of the present invention.
In figure: 1, condenser, 2, main pump, 3, vaporizer, 4, positive-displacement expansion engine, 5, diligent parts, 6, oil separator, 7, oil cooler.
Embodiment
Below in conjunction with the drawings and specific embodiments, for the present invention, be described further.
As shown in Figure 3, this system comprises condenser 1, main pump 2, vaporizer 3, positive-displacement expansion engine 4, diligent parts 5, oil separator 6 and oil cooler 7.Condenser 1, main pump 2, vaporizer 3, oil separator 6, decompressor 4 are coupled together with working medium pipeline in turn, again oil separator 6 lubricating oil outlets, oil cooler 7, decompressor machine oil hole are connected with oil pipe, in system, fill organic working medium and oil mixture.Through parts condenser 1, main pump 2 and vaporizer 3 are mixtures of lubricant oil and organic working medium, this mixture enters after part oil separator 6, organic working medium and lubricating oil separation, wherein organic working medium enters decompressor 4, and the lubricant oil of separating injects decompressor inside through oil cooler 7 needs lubricant oil or cooling position.Decompressor 4 provides acting power for diligent parts 5.
Unlubricated oil pump in system utilizes main pump 2 to improve the pressure that lubricant oil has liquid organic working medium simultaneously.
The forms such as oil cooler 7 can pipeline be naturally cooling in order to utilize, fan cooled or water-cooled.When decompressor 4 internal mechanical sealings, bearing etc. are located to allow higher temperature, also can not establish oil cooler.
Claims (5)
1. the oil supply system for organic Rankine circulation positive-displacement expansion engine, its feature is: condenser (1), main pump (2), vaporizer (3), oil separator (6), decompressor (4) are connected in turn from beginning to end and form working medium circulation loop with working medium pipeline in turn, between the oil hole of oil separator (6) lubricating oil outlet and decompressor (4), with oil pipe, connect, in pipeline, fill organic Rankine cycle working medium and oil mixture; The liquefied mixture of organic Rankine cycle fluid and oil mixture enters vaporizer (3) after main pump (2) pressurization, from vaporizer (3) organic Rankine cycle fluid out, becomes gaseous state, and lubricant oil is liquid; Gaseous state organic Rankine cycle fluid and liquid lubricant oil enter oil separator (6), and the liquid lubricant oil of separating from oil separator (6) injects in decompressor (4); Gaseous state organic Rankine cycle fluid and the lubricant oil of from decompressor (4), discharging enter condenser (1), and organic Rankine cycle fluid is condensed into after liquid state, enter main pump (2) pressurization circulation again together with liquid lubricant oil.
2. a kind of oil supply system for organic Rankine circulation positive-displacement expansion engine according to claim 1, its feature is: liquid lubricant oil injection decompressor (4) after oil cooler (7) is cooling of be also connected with oil cooler (7) between oil separator (6) lubricating oil outlet and the oil hole of decompressor (4), separating from oil separator (6).
3. a kind of oil supply system for organic Rankine circulation positive-displacement expansion engine according to claim 2, is characterized in that: oil cooler (7) is naturally cooling in pipeline, forced air cooling or water-cooled form.
4. a kind of oil supply system for organic Rankine circulation positive-displacement expansion engine according to claim 1, its feature is: oil separator (6) is cyclone separating or filter core separated type.
5. a kind of oil supply system for organic Rankine circulation positive-displacement expansion engine according to claim 1, its feature is: decompressor (4) is reciprocating for positive displacement expands, comprises, eddy type, sliding vane or screw type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410016432.1A CN103726882A (en) | 2014-01-14 | 2014-01-14 | Oil supply system for organic Rankine cycle displacement expansion machine |
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| CN201410016432.1A CN103726882A (en) | 2014-01-14 | 2014-01-14 | Oil supply system for organic Rankine cycle displacement expansion machine |
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| CN103726882A true CN103726882A (en) | 2014-04-16 |
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| CN201410016432.1A Pending CN103726882A (en) | 2014-01-14 | 2014-01-14 | Oil supply system for organic Rankine cycle displacement expansion machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888731A (en) * | 2016-06-06 | 2016-08-24 | 碧城（上海）新能源科技有限公司 | Organic-rankine-cycle single-screw-expander lubricating system |
| CN105971673A (en) * | 2016-06-30 | 2016-09-28 | 王斐芬 | Lubrication system for organic Rankine cycle single-screw expander |
| CN108894829A (en) * | 2018-07-18 | 2018-11-27 | 北京工业大学 | A kind of pneumatic lubricating oil supply system of Organic Rankine Cycle expanding machine based on four-way reversing valve |
| CN114570048A (en) * | 2022-04-24 | 2022-06-03 | 安徽润安思变能源技术有限公司 | Oil separation and working medium purification system and method for organic Rankine cycle generator set |
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| US4191021A (en) * | 1976-08-11 | 1980-03-04 | Hitachi, Ltd. | Small power plant utilizing waste heat |
| CN101194084A (en) * | 2005-06-10 | 2008-06-04 | 城市大学 | Expander lubrication in vapour power generating system |
| CN102410054A (en) * | 2011-10-19 | 2012-04-11 | 北京工业大学 | Engine exhaust gas waste heat recovery and control system and method based on organic rankine cycle |
| EP2476869A1 (en) * | 2011-01-17 | 2012-07-18 | Technische Universität München | Lubrication of volumetric expansion machines |
| CN203730077U (en) * | 2014-01-14 | 2014-07-23 | 北京工业大学 | Oil supplying system of organic Rankine cycle volume type expanding machine |
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2014
- 2014-01-14 CN CN201410016432.1A patent/CN103726882A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4191021A (en) * | 1976-08-11 | 1980-03-04 | Hitachi, Ltd. | Small power plant utilizing waste heat |
| CN101194084A (en) * | 2005-06-10 | 2008-06-04 | 城市大学 | Expander lubrication in vapour power generating system |
| EP2476869A1 (en) * | 2011-01-17 | 2012-07-18 | Technische Universität München | Lubrication of volumetric expansion machines |
| CN102410054A (en) * | 2011-10-19 | 2012-04-11 | 北京工业大学 | Engine exhaust gas waste heat recovery and control system and method based on organic rankine cycle |
| CN203730077U (en) * | 2014-01-14 | 2014-07-23 | 北京工业大学 | Oil supplying system of organic Rankine cycle volume type expanding machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888731A (en) * | 2016-06-06 | 2016-08-24 | 碧城（上海）新能源科技有限公司 | Organic-rankine-cycle single-screw-expander lubricating system |
| CN105971673A (en) * | 2016-06-30 | 2016-09-28 | 王斐芬 | Lubrication system for organic Rankine cycle single-screw expander |
| CN108894829A (en) * | 2018-07-18 | 2018-11-27 | 北京工业大学 | A kind of pneumatic lubricating oil supply system of Organic Rankine Cycle expanding machine based on four-way reversing valve |
| CN108894829B (en) * | 2018-07-18 | 2019-04-19 | 北京工业大学 | A kind of pneumatic lubricating oil supply system of Organic Rankine Cycle expanding machine based on four-way reversing valve |
| CN114570048A (en) * | 2022-04-24 | 2022-06-03 | 安徽润安思变能源技术有限公司 | Oil separation and working medium purification system and method for organic Rankine cycle generator set |
| CN114570048B (en) * | 2022-04-24 | 2022-11-01 | 安徽润安思变能源技术有限公司 | Oil separation and working medium purification system and method for organic Rankine cycle generator set |
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Owner name: ZHONGTOU YIXING NEW ENERGY INVESTMENT CO., LTD. Free format text: FORMER OWNER: BEIJING INDUSTRY UNIVERSITY Effective date: 20150612 |
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Application publication date: 20140416 |