Investigations on the performance of chevron type plate heat exchangers

Dutta, Oruganti Yaga; Rao, B. Nageswara

doi:10.1007/s00231-017-2107-3

Cited by 21 publications

(8 citation statements)

References 18 publications

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“…A systematic popular statistical approach, namely, the Taguchi method 20 considers an orthogonal array (OA) and recommends few tests for generating information on performance indicators (PIs) to all possible combinations of the levels of input variables or to the full factorial design of experiments (DOE). This approach minimizes the expenditure as well as time-consumption of trial test runs and obtains solutions for many engineering optimization problems, such as minimization on the introduction of damages in composites due to drilling, [21][22][23][24] rigid body dynamic separation process during the flights of space vehicles, [25][26][27] heat exchanger performance, 28 planetary gears design, 29,30 welding [31][32][33][34][35][36] and machining processes, [37][38][39][40][41][42][43][44][45] and fuel engine performance. [46][47][48][49] Kumar et al 50 performed experiments to investigate the performance of HP considering three input variables (such as heat input [A], inclination angle [B], and flow rate [C]) for the three PIs: efficiency η ( ), thermal resistance (THR), and overall heat transfer coefficient (OHTC).…”

Section: Introductionmentioning

confidence: 99%

Multiobjective optimization for the optimal heat pipe working parameters based on Taguchi's design of experiments

2021

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A heat pipe (HP) is a device transferring large quantities of heat through a small area of the cross‐section with very small deviations in temperature. The thermal impedance of HP is lower while thermal conductance is higher. HPs are designed for controlling temperature, amplification of heat flux, and diminution. HPs are being used in the cooling of aircraft and electronics, solar energy, systems of heat recovery, and nuclear reactors. Complex mathematical formulation demands experimentation to acquire the physical phenomena. Performing experiments is a tedious task with increasing the working parameters and their assigned levels. In such situations, a systematic statistical approach (viz., the Taguchi method) has to be adopted to minimize the number of experiments and to provide the information for the full factorial design of experiments. This paper adopts the modified Taguchi method and applies a simple and reliable multiobjective optimization concept to determine the optimal HP working parameters (viz., heat input, inclination angle, and flow rate). In the optimization process, efficiency, thermal resistance, and overall heat transfer coefficient are the performance indicators (PIs). Empirical relations are developed and validated for the PIs in terms of the HP working parameters. The recommended Taguchi's orthogonal array to perform a few tests may not have the set of optimal working parameters. Additional tests are to be performed to confirm the estimates of the PIs for the optimal working parameters. Confirmation test results in the present study indicate close‐to/within the estimated range.

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Section: Introductionmentioning

confidence: 99%

Multiobjective optimization for the optimal heat pipe working parameters based on Taguchi's design of experiments

2021

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“…It is being adopted to understand the effects of drilling induced damage in composites (Srinivasa Rao et al , 2008; Parameshwaran Pillai et al , 2011; Rajeev Kumar et al , 2017; Konduri et al , 2017) and to develop empirical relations for bursting pressure evaluation of rocket motor casings (Singaravelu and Nageswara Rao, 2009) and failure load estimates of compact tension specimens in fracture toughness testing (Singaravelu et al , 2013). The sensitivity of several influencing input parameters is examined in the stage separation, strap-on separation and satellite separation processes of space launch vehicles in flight (Singaravelu et al , 2009, 2011, 2012), and also while studying the performance of chevron type plate heat exchangers (Dutta and Nageswara Rao, 2018) and in the selection of input process parameters for achieving the optimum output responses through few experiments/numerical simulations as per the Taguchi’s orthogonal array (Sahiti, Reddy, Joshi, Praveen and Nageswara Rao, 2016; Sahiti, Reddy, Joshi and Nageswara Rao, 2016; Bharathi et al , 2016; Satyanarayana et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Expected range of the output response for the optimum input parameters utilizing the modified Taguchi approach

Rajyalakshmi

Boggarapu

2019

MMMS

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Purpose Scatter in the outcome of repeated experiments is unavoidable due to measurement errors in addition to the non-linear nature of the output responses with unknown influential input parameters. It is a standard practice to select an orthogonal array in the Taguchi approach for tracing optimum input parameters by conducting a few number of experiments and confirm them through additional experimentation (if necessary). The purpose of this paper is to present a simple methodology and its validation with existing test results in finding the expected range of the output response by suggesting modifications in the Taguchi method. Design/methodology/approach The modified Taguchi approach is proposed to find the optimum process parameters and the expected range of the output response. Findings This paper presents a simple methodology and its validation with existing test results in finding the expected range of the output response by suggesting modifications in the Taguchi method. Research limitations/implications Adequacy of this methodology should be examined by considering the test data on different materials and structures. Originality/value The introduction of Chauvenet’s criterion and opposing the signal-to-noise ratio transformation on repeated experiments of each test run will provide fruitful results and less computation burden.

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“…Selection of an orthogonal array to conduct few experiments, acquiring complete information and confirmation of the identified optimum input process parameters through additional testing (if necessary) is a standard practice in the Taguchi approach [9]. Taguchi method is a systematic statistical approach, which has been successfully utilized in solving several engineering/industrial optimization problems such as minimization of drilling induced delamination type damages in composite structures, investigations on the significance of input parameters in the stage and satellite separation processes during flight of space launch vehicles, influence of parameters on the performance of chevron type plate heat exchangers and the selection of input process parameters for achieving optimum output responses [10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Optimal laser welding process parameters and expected weld bead profile for P92 steel

2019

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P92 steel is classified as one of the creep strength enhanced ferritic steels, whose welding plays a crucial role in power industries. The best choice for such materials is the laser welding in open atmosphere with an inert gas shield. Compared to the frequently being used Taguchi based grey relational analysis, a simple and systematic approach known as the modified Taguchi design of experiments is utilized for P92 steel to obtain the optimized laser welding process parameters and the expected range of output responses. The complicated non-linear relationship between the laser welding process parameters (viz., laser power, welding speed and focal position) and the welding bead geometry (such as depth of penetration, weld width and heat affected zone width) is developed through empirical relations, which are validated by comparing with existing test results. Most of the test results are found to be within the expected range. From the ANOVA analysis the process parameter, viz. the focal position is found to have negligible variation on the overall mean value of the output responses and hence, the process designer can opt for any one the set levels of the focal position during welding operations.

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Investigations on the performance of chevron type plate heat exchangers

Cited by 21 publications

References 18 publications

Multiobjective optimization for the optimal heat pipe working parameters based on Taguchi's design of experiments

Multiobjective optimization for the optimal heat pipe working parameters based on Taguchi's design of experiments

Expected range of the output response for the optimum input parameters utilizing the modified Taguchi approach

Optimal laser welding process parameters and expected weld bead profile for P92 steel

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