Gopal Fartyal’s research while affiliated with Amity University and other places

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Publications (3)

Fig. 1. Schematic presentation of TORVC refrigeration system 
Fig. 3. Influence of the condenser temperature on the COPH for different efficiencies 
Fig. 6. Influence of the evaporator temperature on the COPH for different efficiencies. 
Fig. 9. Influence of the degree of superheating on the COP's 
EFFECT OF VARIOUS OPERATING CONDITIONS ON THE COOLING PERFORMANCE OF TRANSCRITICAL ORGANIC RANKINE REFRIGERATION SYSTEM
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May 2017

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998 Reads

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1 Citation

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Sunny Singh

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Vivek Kumar Chahar

Organic Rankine vapour compression (ORVC) refrigeration systems using waste heat are well known in the literature. In last year’s, transcritical organic Rankine vapour compression (TORVC) systems are proposed to increase the system coefficient of performance (COP). This paper presents the parametric simulation results and the performance analysis of TORVC refrigeration system utilizing waste heat using R134a as working fluid under different operating conditions such as evaporation/condensation temperature and degree of superheating/sub-cooling. Heat-to-electrical energy conversion efficiency is also taken into account. System COP is defined using not only the heating energy required for the refrigerant but also electrical energy input to the pump. As waste heat one can consider also exhaust heat of the vehicles. Variation of system COP for different evaporation/condensation temperatures and the degree of superheating/sub-cooling are demonstrated. In the calculation refrigerant temperature and pressure at the heat source are taken as 180⁰C and 8 MPa.

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Figure 1 The flowchart of simple Brayton cycle 
Figure 3 The variation of the net power (N B ) of simple Brayton cycle with compressor pressure ratio (Prc) Figure 3 demonstrates the variation of net power of simple Brayton cycle with compressor pressure ratio (Prc) for different ambient temperature (AT). Depend on increasing compressor pressure ratio, the net power rises, next crosses maximum point and then decreases for any ambient temperature such as efficiency. The maximum point varies with ambient temperature. 
Figure 4 The variation of the total efficiency (η B ) with the net power (N B ) of simple Brayton cycle 
Figure 5 The variation of the turbine exit temperature (TET) with the compressor pressure ratio of simple Brayton cycle 
The impact of ambient temperature on performance of simple brayton cycle

April 2017

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1,771 Reads

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5 Citations

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A. Tiwari

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K. Chauhan

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V.K. Chahar

In this study, the performance analysis of the simple Brayton cycle is studied. The net power and total efficiency of system are chosen as the performance criteria. The variable parameters selected for analysis are the compressor pressure ratio and ambient temperature. The others variables are assumed constant. The equations for calculating the power and efficiency are formulated as a function of these decision variables. As a result, developed model has been solved and the design conditions giving maximum power and efficiency have been determined.

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Citations (3)

... Saleh [3] performed working fluid and parametric analysis of the combined organic Rankine vapor compression refrigeration system activated with a low-grade waste heat source. Tiwari et al. [26] presented a transcritical organic Rankine vapor compression (TOVRC) cooling system that uses parametric simulation results and waste heat using R134a as the working fluid. Zhang and Zhang [27] reported a method that experimentally used a CO 2 vapor compression thermodynamic loop to recover heat at low temperatures from the finished water vapor of fossil-fueled thermal power plants. ...

Reference:

Exergoeconomic Analysis of Steam Turbine Driving Vapor Compression Refrigeration System in an Existing Coal-Fired Power Plant
EFFECT OF VARIOUS OPERATING CONDITIONS ON THE COOLING PERFORMANCE OF TRANSCRITICAL ORGANIC RANKINE REFRIGERATION SYSTEM

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Sunny Singh

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Vivek Kumar Chahar

... This is in line with the report by [10], that for the SGT5-2000E, power output reduces by 1.16% per degree Celsius increase in ambient temperature. [18], also discussed how this phenomenon arises due to the thermodynamic limitation of Brayton cycles under varying environmental conditions, and [19] also reported a reduction in power and efficiency as a result of high air inlet temperature. ...

Reference:

Modeling and Performance Assessment of AN SGT5- 2000E Gas Turbine in AZURA Power Plant
The impact of ambient temperature on performance of simple brayton cycle

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A. Tiwari

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K. Chauhan

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V.K. Chahar

... Several research studies have criticized the functioning of the Indian education system. These studies show that Indian education heavily emphasizes retention for exam purposes, and favours theory over application-based understanding (Agarwal, 2017;Deb, Strodl, & Sun, 2015;Gautam, Singh, Fartyal, Tiwari, & Arya, 2016;Nussbaum, 2006). Some studies have also criticized the education system for stifling imagination, curiosity and a thorough understanding of concepts among students resulting in poor and inadequate learning outcomes (Agarwal, 2017;Gautam et al., 2016;Jain & Prasad, 2018;Nussbaum, 2006). ...

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Exploring the significance of Indian logic in overcoming contemporary limitations in the Indian education system
Education System in Modern India

International Journal Of Scientific Research And Education

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Sunny Singh

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Gopal Fartyal

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Kuldeep Singh Arya