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  Digital Catalogue for Technology and Products Development


   Technology and Product Development

    Basic Information

Technology developed: An enhanced tube with plurality of micro-indentations on the inside surface for effective heat trans (TP19763249703)
Category: Product(Hardware/Material/Software)
Details of Inventor(s):
Inventor Institution/Organization/Company Department Designation
Darshan M B Indian Institute of Techonology Roorkee Mechanical and Industrial Department Research Scholar
Arup Kumar Das Indian Institute of Techonology Roorkee Mechanical and Industrial Department Associate Professor
Ravi Kumar Indian Institute of Techonology Roorkee Mechanical and Industrial Department Professor
Technical Application Area: Mechanical Engineering
If 'Other', please specify:
Mechanical Engineering
Please give more details of new technical application area:
Day by day augmentation technique for heat transfer coefficient is becoming inevitable in a number of highend applications like space technology, large scale integration of electronic components,supercomputers, etc.In boiling heat transfer one can expect the highest rate of heat transfer at very low temperature drop across the surface and the working fluid. Amongst two different modes of boiling heat transfer, some applications like refrigeration, power plants and dairy industries prefer flow boiling over the stagnant pool. But due to increased demand of high heat loads, search for enhancement of heat transfer coefficients in flow boiling is now the common practice.Abundant examples of flow boiling can be found in electronic and micro-electronic cooling, the enhancement of the efficiency of the process and heat transfer equipment, refrigeration and air-conditioning industry employing alternative and natural refrigerants (viz. CO2), heat pipes, etc. Future technologies promise even higher heat loads and compel the search for improved heat transfer systems and the enhanced flow boiling is possibly the best in offer. Flow boiling passively removes heat load maintaining relatively low material temperatures prolonging its life as well. Attempts at augmenting the heat transfer will enable the use of more competitive materials and designs.Present invention aims at augmentation of flow boiling heat transfer inside tubular surfaces considering conventional and ozone-safe or eco-friendly refrigerants as working fluid. Sustained increase in heat transfer coefficient with aging requires increase in active nucleation sites and simultaneous arrangement of liquid replenishment on the tube surface. Both of these can be achieved by structuring inside the boiling tube surface as re-entrant geometry. This enhancement technique neither needs any auxiliary power nor gives rise to an excessive pressure drop.
Organization(s):
Indian Institute of Technology (IIT) Roorkee
Affiliated Ministry: Ministry of Micro Small and Medium Enterprises
Type of technology development: Indigenous
Does the technology help in replacing any import items currently
procured from outside India?
Yes
Does the technology have export potential? Yes
Category of Technology developed: Immediate Deployment
Stage of Development: Prototype Level
Please describe in detail including the TRL Level:
In the present invention, a proposal for enhancement of heat transfer is made by indigenously developed micro-indentations inside tube. Present invention describes a new enhancement tube with plurality of micro-indentations on the inside surface of the tube which can be manufactured at comparatively lower cost and can deliver very good heat transfer performance with lesser pressure drop penalty.

    Abstract:

Applications: Proposed invention is quite relevant to the heat transfer and fluid mechanics community. Taking the queue from the present research, augmentation of heat transfer and fluid flow can be planned in other applications such as pool boiling, solar applications etc. Formation of interface at structured surface can help in chemical reactor study where gaseous phase is generated due to mass transfer in chemical reactions. In nuclear industry, during quenching of fuel rods or chugging, boiling heat transfer is quite common. The intelligently designed structured tubes can be extrapolated for cooling systems in nuclear industries. The most important use of present invention is observed in air conditioning and refrigeration industry. The developed indigenous tubes with internal indentations will definitely help in compact designing of conventional evaporators and condensers. Augmentation tube proposed in this invention can be used in commercial purpose to increase the COP of the cycle. Moreover, testing has been done with new eco-friendly and ozone safe refrigerants can be used for design and developments of actual refrigeration and air conditioning systems. Various commercial tube manufactures can adopt our design and develop tubes for better enhancement. Hence the target beneficiaries of the present project are multidisciplinary.
Advantages: At present the enhanced tubes available commercially such as microfin tubes do provide a good heat transfer performance but fails to address the pressure drop issues. The heat transfer enhancement of these tubes comes with huge pressure drop penalty which reduces the overall performance of the heat exchanger. In the present invention, the tubes with micro indentations are observed to provide better heat transfer performance with comparatively very less pressure drop penalty. At present, the method of heat transfer enhancement is limited to providing grooves over the internal surface of the tube which is done by providing required set of structures over the costly rolling machine. This increases the overall cost of production of the tube.With the method of tube development that we have done, the enhanced tube can be manufactured at comparatively lower cost. Moreover, the newly developed tubes have been tested with ecofriendly refrigerants and is observed to provide higher overall performance then the existing tubes in market. The data of new ecofriendly and ozone safe refrigerants can be used for design and developments of actual refrigeration and air conditioning systems. Various commercial tube manufactures can adopt our design and develop tubes for better enhancement. The enhanced tube with plurality of micro indentations, can be made up of low carbon steel, Admiralty, copper, copper nickel, stainless steel, aluminium or any other such kind which are normally used for designing evaporators or condensers in the refrigeration and air conditioning industries.

    Technology Inputs:

Imported Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
0 NA 00000000
Indigenous Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
0 NA 00000000
Imported Raw Materials:
Raw Materials Year ITC-HS Code
0 NA 00000000
Indigenous Raw Materials:
Raw Materials Year ITC-HS Code
Copper sheet, brazing rods 2019-20 00000000
Existing R&D Facilities used:
Facilities Year ITC-HS Code
Drilling Machine and Brazing setup in Refrigeration Air Conditioning Lab 2019-20 00000000

    R&D Investment:

R&D investment (Rs. in Lakhs):                    
Indian Source (Rs.) Foreign Source (Rs.) Year
1 0 NA

   Patents & Publications:

Patents:
Filed Patents (No.) Granted Patents (No.) Year
2147483647 0 2019-20
Publications:
Submitted (No.) Published (No.) Year
0 1 2019-20

    Commercialization Potential:

Who are the Potential Licensees? Present invention has a potential to be an added advantage for any industries which involve boiling heat transfer. Especially, Refrigeration and air-conditioning industries can be hugely benefitted with the use of indigenously designed tubes with internal micro-indentations.
What commercially available products address
the same problem?
Company Product Problem Addressed
Luvata tubes, Wolverine.inc micro-fin or internally grooved tubes heat transfer augmentation but involves huge pressure drop penalty which in turn results in lesser o
Would you like to develop this invention further with
corporate research support?
Yes
Would you be interested in participating in cluster based
programs for commercialization research or business
planning for your invention?
Yes
      Submitted by: Akshay Dvivedi Date of Submission: 5-8-2020



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