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Sandhu, Harkirat
- Experimental Study on Low-Grade Waste Heat Recovery with Thermoelectric Generators
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Authors
Affiliations
1 Department of Mechanical Engineering, Chandigarh University, Gharuan, Mohali – 140413, Punjab, IN
2 Department of Chemical Engineering, Chandigarh University, Gharuan, Mohali – 140413, Punjab, IN
1 Department of Mechanical Engineering, Chandigarh University, Gharuan, Mohali – 140413, Punjab, IN
2 Department of Chemical Engineering, Chandigarh University, Gharuan, Mohali – 140413, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 11, No 26 (2018), Pagination: 1-5Abstract
Low-grade waste heat recovery has emerged as a need for both efficient and sustainable approach. Till now conventional systems have failed to provide any assistance in harnessing and efficient conversion of low-grade to medium grade heat because of their huge sizes, high investment in land and equipment, complexity in design and scarcity in their availability. Researchers are now trying to solve these problems with the use of thermoelectric generators. These solid-state semiconductor devices can convert heat fluxes into DC output by maintaining a certain temperature gradient across its surfaces. Depending on the device and its rating power output increases with the rise in temp gradient. Objective: To identify errors with TEG module and if possible to perform investigation on it. Method/Statistical Analysis: In this method, two different positions were used. Firstly, one heat input surface was upside (hot side up) and second with heat input from below (Hot side down). This change in position will affect the convective motion of trapped air molecules and effect (if any) could be noticed. Findings: For hot side down position, there was an increment of 0.22% voltage output, 0.44% more power output and 0.521% increment in See beck coefficient observed in comparison with hot side up position.Full Text
References
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- Numerically Investigation on Heat Transfer and Pressure Drop Behavior of MWCNT Nanofluid in MCHS
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Authors
Affiliations
1 Mechanical Department, Chandigarh University, Mohali – 140413, Punjab, IN
2 Chemical Department, Chandigarh University, Mohali – 140413, Punjab, IN
1 Mechanical Department, Chandigarh University, Mohali – 140413, Punjab, IN
2 Chemical Department, Chandigarh University, Mohali – 140413, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 11, No 28 (2018), Pagination: 1-12Abstract
Background/Objectives: To find the best method for nanofluid stability or increment in heat transfer enhancement and terminating pressure drop. Methods/Statistical analysis: Nanofluids have big problem regarding its own preparation or stability. Here is details which can prevent both of problem. This paper based on a work which is able to prevent nanofluids stability problem or pressure drop problem in MCHS. Findings: MCHS vary from 2 cm to several feet or meter because its depends on the requirement of work. The design procedure is complex because of its diameter vary in micro-meter, but it can be designed for our requirement easily. Traditionally we utilized water, ethylene-glycol & some special kind of oils. But, with the large demand in obligation of working efficiency nanofluids were produced which are colloidal mixture of base fluid with nanoparticles. Nanofluids have truly developed the heat transfer characteristics of base fluids & hence are great base to overall working efficiency of the system. But along with advantages it also has quite a few disadvantages to which are stability, limitation to the volumetric concentration addition process of manufacturing and most of all economics of production. Improvements/Applications: They can also be used for wide range of applications such as in the chemical industry, food processing industry, refrigeration industry, computer technology industry, automobile industry, aerospace industry, power plant, mechanical industry etc.Full Text
References
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- Experimental Study of Thermal Properties of PCM with Addition of Nano Particles
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Authors
Affiliations
1 Mechanical Engineering, Chandigarh University, Mohali, Sahibzada Ajit Singh Nagar −140413, Punjab, IN
1 Mechanical Engineering, Chandigarh University, Mohali, Sahibzada Ajit Singh Nagar −140413, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 11, No 28 (2018), Pagination: 1-5Abstract
Objective: We need to find method to improve PCM of thermal or physical properties by using nano particles as heat transfer rate enhancers. Methods/Statistical Analysis: In this study, we tested the thermal properties like, thermal conductivity, Density, Latent heat, Temperatures of paraffin composites. For this experimentation such as DSC, SEM and KD2 PRO were used. Nano particles used are Al2O3 and Cu O at different volume concentrations 0.1, 0.3 and 0.5 wt% to produce modified paraffin wax. Findings: Depends on our results, it may be fulfilled that the equipped PCMs can be regarded of use heat storage materials for some purpose in energy storage system. It can be resulted that by adding nano particles to improve melting points, pour points etc are improved in comparison with pure PCM. Heat capacity of nano composite is decreases with increase in nano particle concentration. Improvement/Applications: The nano particles can be used to get better physical properties of the nano composites and it’s applicable in construction materials, warm water, House heating, Catering, Temperature Peak Stabilization and Green House.Full Text
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