Title of Invention

AN APPARATUS FOR CIRCULATING HEAT TRANSFER MEDIUM

Abstract

There is proposed an exhaust gas fired thermosyphon heat pump comprising: a) a feeding unit for feeding gas to the heat ;exchanger of a thermosyphon unit, b) a hot fluid supply unit for supplying the hot fluid from the heat exchanger of the thermosyphon unit to a vapour absorption machine, c) a high temperature heat generator within vapour absorption machine having Lithium Bromide as working fluid for absorbing the heat from the hot fluid flowing through same, d) a return pipe unit for supplying the depleted fluid from the H. T. generator to the heat exchanger of the thermosyphon. e) there being provided an exhaust gas stack for the discharge of heat depleted exhaust gases from said thermosyphon.

Full Text

FORM - 2 THE PATENTS ACT, 1970 {39 OF 1970) AND THE PATENTS RULES, 2003 COMPLETE SPECIFICATION {See section 10; rule 13) AN APPARATUS FOR CIRCULATING HEAT TRANSFER MEDIUM THERMAX LIMTIED an Indian Company of D-13, MIDC Industrial Area, Chinchwad, Pune 411 019, Maharashtra, India THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED. 21 OCT 2008 Title of the Invention: An apparatus for circulating heat transfer media. Field of Invention: The invention relates to a thermo siphon system which recovers heat from any waste heat source such as exhaust gases of DG set and utilizes it as a heat source for any vapor absorption heat pump system. Background: It is already known in the prior art that the heat sources for vapor absorption heat pump are mostly one of the following: 1. Live steam at around 8 kg/cm2 generated from any steam boiler, 2. Pressurized hot water generated from any hot water generator and normally pumped through the generator of vapor absorption heat pump, 3. Direct firing of liquid / gaseous fuels in the generator, 4. High temperature thermic fluid pumped through the tubes of generator. Hence it can be seen that vapor absorption heat pump's basic heat source, if it is steam or hot water or thermic fluid, it requires pump to force the working medium through generator. In case of steam, pump is required to force the condensate back to the boiler. Requirement of pump for forcing working medium through generator tubes or for forcing condensate back to boiler in case of steam and associated operating cost with it. In case of steam boilers, the system is an open loop type and the total hold up of such boiler generally exceeds 22.75 liters, bringing it under the purview of IBR (INDIAN BOILERS REQULATION) higher manufacturing cost and time as well as higher erection time. OBJECTS OF THE INVENTION Primary object of this invention is to provide a thermosyphon system, which recovers heat from any waste heat source such as DG set exhaust gases and acts as a heat source for operating vapor absorption heat pump (VAHP). It is another object of this invention is to provide a new control system for turndown and control of VAHP operating with new thermosyphon system as a heat source. It is also another object of this invention is to provide a system as a combination of thermosyphon and VAHP, with a purpose to utilize heat from waste heat sources such ax exhaust gases of DG sets for producing cooling effect through VAHP. Yet another objective of the present invention is to provide an apparatus which is robust. Yet another objective of the present invention is to provide an apparatus which is easy to manufacture. SUMMARY OF THE INVENTION: In accordance with the invention there is provided an apparatus for circulating heat transfer media through the high temperature generator of a vapor absorption machine, said apparatus comprising; an exhaust gas supply unit for supplying hot gases, at least one thermo siphon unit for receiving heat depleted, heat-transfer media from the high temperature generator and for delivering hot heat transfer media to the high temperature generator, a heat exchanger provided within said thermo siphon unit or co-operating with said thermo siphon unit for extracting heat from the exhaust gas received from said exhaust gas supply unit and supplying the extracted heat to the heat transfer media received in said thermo siphon unit, a transfer pipe for transferring hot heat transfer media from said thermo siphon unit to the high temperature generator, a return pipe for supplying heat depleted heat transfer media from the high temperature generator to said thermo siphon unit, a U-shaped bend provided in said return pipe for preventing reverse flow of the heat transfer media from said thermo siphon unit into said return pipe. Typically, said heat exchanger of said thermo siphon unit is selected from group consisting of a shell and tube heat exchanger, a coil type heat exchanger, a double pipe heat exchanger, a plate type heat exchanger, a floating header type heat exchanger and a kettle type heat exchanger. Typically, said heat exchanger in said thermo siphon unit is of the shell and tube type and is adapted to receive hot exhaust gas on shell side and heat depleted heat transfer media on tube side. Typically, said heat exchanger in said thermo siphon unit is of the shell and tube type and is adapted to receive hot exhaust gas on the tube side and heat depleted heat transfer media on the shell side. Typically, said exhaust gas supply unit is provided with a diverter damper arrangement adapted to regulate / divert flow of hot exhaust gas from said exhaust gas supply unit. Typically, said exhaust gas supp}y unit has a slack adapted to remove unwanted hot gases. Typically, said heat exchanger of said thermo siphon unit is has an outlet means adapted to remove heat depleted exhaust gas via a stack. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING: The invention will now be described with respect to the accompanying drawings in which: Figure 1- illustrates the complete apparatus with LiBr heat pump. DETAIL DESCRIPTION OF THE INVENTION IN ACCORDANCE WITH THE ACCOMPANYING DRAWING: Figure 1: Shows an apparatus for circulating heat transfer medium, comprising an exhaust gas supply unit (2) having a diverter damper (3) from where hot exhaust gas (I) enters and is passed to thermo siphon unit (5) having a heat exchanger (7). The hot exhaust gas transfers heat with thermic fluid in heat exchanger. The hot thermic fluid now rises upwards through transfer pipe (9) to high temperature generator unit (11) of vapor absorption machine (13). The high temperature generator unit (11) of vapor absorption machine (13) is placed at higher level then heat exchanger (7) of thermo siphon unit (5) to facilitate the flow of heat transfer medium. After transferring heat in high temperature generator unit (11) thermic fluid is allowed to return to the heat exchanger (7) of thermo siphon unit (5) via return pipe (15). The return pipe is provided with u- turn structure which acts as non-return valve. Heat depleted exhaust gas (4) from thermo siphon unit and unwanted exhaust gas (6) From exhaust gas supply unit is allowed to pass via stack, CYCLE DESCRIPTION: In accordance with the present invention; exhaust gases (1) from DG sets are allowed to pass through an exhaust gas supply unit (2) having diverter damper (3) placed in between thermo siphon unit (5). The thermo siphon unit (5) consists of heat exchanger (7) which has heat transfer medium, generally water. Heat from flue gases is transferred to the heat transfer and heat transfer medium gets heated up and becomes lighter and rises upwards through transfer pipe (9) to the high temperature generator unit (11) of vapor absorption machine (13). Heat from heat transfer medium is transferred to the absorbent medium in the high temperature generator unit (11) of vapor absorption machine (13).The heat transfer medium after transferring heat in high temperature generator (11) returns to the heat exchanger (7) of thermo siphon unit (5) via return pipe (15). The return pipe is provided with U turn structure (16) which acts as non-return valve. The high temperature generator (11) of vapor absorption machine (13) is located at higher level then heat exchanger (7) of thermo siphon unit (5) to facilitate flow of heat transfer medium and complete the cycle. Thus the heat is transferred from exhaust gasses to the high temperature generator (11) of vapor absorption machine (13) to produce cooling effect for end use. Exhaust gases (6) / (4) from diverter damper (3) and heat exchanger (7) of thermo siphon unit respectively is sent to stack via pollution control equipment. The flow takes place because of density difference between hot and cold heat transfer media. While considerable emphasis has been placed herein on the specific structure of the preferred embodiment, it will be appreciated that many alterations can be made and that many modifications can be made in the preferred embodiment without departing from the principles of the invention. These and other changes in the preferred embodiment as well as other embodiments of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation. We Claim: 1. An apparatus for circulating heat transfer media through the high temperature generator of a vapor absorption machine, said apparatus comprising; a) an exhaust gas supply unit for supplying hot gases, b) at least one thermo siphon unit for receiving heat depleted, heat-transfer media from the high temperature generator and for delivering hot heat transfer media to the high temperature generator, c) a heat exchanger provided within said thermo siphon unit or cooperating with said thermo siphon unit for extracting heat from the exhaust gas received from said exhaust gas supply unit and supplying the extracted heat to the heat transfer media received in said thermo siphon unit, d) a transfer pipe for transferring hot heat transfer media from said thermo siphon unit to the high temperature generator, e) a return pipe for supplying heat depleted heat transfer media from the high temperature generator to said thermo siphon unit, f) a U-shaped bend provided in said return pipe for preventing reverse flow of the heat transfer media from said thermo siphon unit into said return pipe. 2. An apparatus as claimed in claim I,wherein said heat exchanger of said thermo siphon unit is selected from a group consisting of a shell and tube heat exchanger, a coil type heat exchanger, a double pipe heat exchanger, a plate type heat exchanger, a floating header type heat exchanger and a kettle type heat exchanger. 3. An apparatus as claimed in claim I, wherein said heat exchanger in said thermo siphon unit is of the shell and tube type and is adapted to receive hot exhaust gas on the shell side and heat depleted heat transfer media on the tube side. 4. An apparatus as claimed in claim 1, wherein said heat exchanger in said thermo siphon unit is of the shell and tube type and is adapted to receive hot exhaust gas on the tube side and heat depleted heat transfer media on the shell side. 5. An apparatus as claimed in claim 1, wherein said exhaust gas supply unit is provided with a diverter damper arrangement adapted to regulate / divert flow of hot exhaust from said exhaust gas supply unit. 6. An apparatus as claimed in claim 1, wherein said exhaust gas supply unit has a stack adapted to remove unwanted hot gases. 7. An apparatus as claimed in claim 1, wherein said heat exchanger of said thermo siphon unit has an outlet means adapted to remove heat depleted exhaust gas via a stack.

Documents:

533-MUM-2004-ABSTRACT(11-5-2009).pdf

533-MUM-2004-ABSTRACT(21-10-2008).pdf

533-mum-2004-abstract(complete)-(7-5-2004).pdf

533-mum-2004-abstract(granted)-(15-4-2010).pdf

533-mum-2004-cancelled pages(2-8-2010).pdf

533-mum-2004-cancelled pages(21-10-2008).pdf

533-MUM-2004-CANCELLED PAGES(7-5-2004).pdf

533-MUM-2004-CLAIMS(11-5-2009).pdf

533-mum-2004-claims(21-10-2008).doc

533-MUM-2004-CLAIMS(21-10-2008).pdf

533-mum-2004-claims(complete)-(7-5-2004).pdf

533-mum-2004-claims(granted)-(15-4-2010).pdf

533-mum-2004-correspondence 1(3-5-2004).pdf

533-mum-2004-correspondence 2(23-6-2007).pdf

533-MUM-2004-CORRESPONDENCE(11-5-2009).pdf

533-MUM-2004-CORRESPONDENCE(21-10-2008).pdf

533-mum-2004-correspondence(22-4-2010).pdf

533-mum-2004-correspondence(ipo)-(10-7-2009).pdf

533-mum-2004-correspondence(ipo)-(15-4-2010).pdf

533-mum-2004-correspondence(ipo)-(3-8-2010).pdf

533-MUM-2004-DESCRIPTION(COMPLETE)-(11-5-2009).pdf

533-MUM-2004-DESCRIPTION(COMPLETE)-(21-10-2008).pdf

533-mum-2004-description(complete)-(7-5-2004).pdf

533-mum-2004-description(granted)-(15-4-2010).pdf

533-MUM-2004-DRAWING(21-10-2008).pdf

533-mum-2004-drawing(complete)-(7-5-2004).pdf

533-mum-2004-drawing(granted)-(15-4-2010).pdf

533-MUM-2004-FORM 1(7-5-2004).pdf

533-mum-2004-form 13(22-6-2007).pdf

533-mum-2004-form 13(23-6-2007).pdf

533-mum-2004-form 18(5-5-2006).pdf

533-mum-2004-form 2(11-5-2009).pdf

533-mum-2004-form 2(21-10-2008).doc

533-mum-2004-form 2(21-10-2008).pdf

533-mum-2004-form 2(complete)-(7-5-2004).pdf

533-mum-2004-form 2(granted)-(15-4-2010).pdf

533-MUM-2004-FORM 2(TITLE PAGE)-(11-5-2009).pdf

533-MUM-2004-FORM 2(TITLE PAGE)-(21-10-2008).pdf

533-mum-2004-form 2(title page)-(complete)-(7-5-2004).pdf

533-mum-2004-form 2(title page)-(granted)-(15-4-2010).pdf

533-MUM-2004-FORM 26(21-10-2008).pdf

533-MUM-2004-FORM 3(21-10-2008).pdf

533-mum-2004-form 3(7-5-2004).pdf

533-mum-2004-general power of attorney(7-5-2004).pdf

533-mum-2004-specification(amanded)-(21-10-2008).pdf