Exergoeconomic Analysis of a Heat Pump Tumbler Dryer

Ganjehsarabi, Hadi; Dinçer, İbrahim; Güngör, Ali

doi:10.1080/07373937.2013.829853

Cited by 45 publications

(10 citation statements)

References 27 publications

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“…Specific moisture extraction rate and moisture extraction rate (MER) are commonly used to evaluate an HPD. Ganjehsarabi et al [15] performed exergy and exergoeconomic analyses of a heat pump tumbler dryer by using actual thermodynamic and cost data. They dried wet cotton fabric, and the results showed that the SMER was equal to 1.08 kg/kWh.…”

Section: Introductionmentioning

confidence: 99%

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

et al. 2018

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In this study, an experimental heat pump dryer was designed. The specific moisture extraction rate and moisture extraction rate were used as performance indicators to explore the influence of environmental factors and the style of the hot air cycle on heat pump drying. The average temperature and humidity in Nanjing’s summer, winter, and throughout the whole year were taken as the experimental ambient temperature and humidity. Garlic slices 3 mm thick, with an initial moisture content of 66.714% w.b., were dried until the end moisture content was 10% w.b. Experimental results and thermal analysis showed that the open and semi-open heat pump dryers were greatly affected by ambient temperature and humidity. The closed heat pump drying system was greatly affected by the bypass air rate.

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Section: Introductionmentioning

confidence: 99%

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

et al. 2018

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“…The total cost of drying is given as,

C_{italicTotal} = C_{italicIC} + C_{italicRU}

Total profit from using WHR‐assisted HPD over simple HPD is the difference between the cost of WHR‐assisted HPD and simple HPD and given as,

C_{F} = C_{T o t a l, H P D, H R} ‐ C_{T o t a l, H P D}

Payback period (indicates the time period to recover the capital investment, which is the initial investment cost per average profit) is given as (Atalay, 2019),

P_{P} = \frac{C_{IC}}{C_{F}}

Exergoeconomic analysis aims to estimate the cost related to the exergy destruction and component inefficiencies. Exergy cost balance for the different components of the system is given as (Ganjehsarabi, Dincer, & Gungor, 2014),

\underset{italicout}{false\sum} C_{x, o u t, k} + C_{x, w, k} = C_{x, q, k} + \underset{italicin}{false\sum} C_{x, i n, k} + C_{k}

The overall cost of the WHR‐assisted HPD can be determined by Equation (17).…”

Section: Methodsmentioning

confidence: 99%

“…The cost rate of exergy flow through the system at the exergy inlet, exergy outlet, and exergy destruction can be estimated by the followings (Ganjehsarabi et al., 2014),

C_{x, i n p u t} = c_{italicinput} E x_{italicinput}

C_{x, o u t p u t} = c_{italicoutput} E x_{italicoutput}

C_{x, d e s t} = c_{italicdest} E x_{italicdest}

The following equation can give the total exergy cost rate,

C_{x, T o t a l} = C_{x, d e s t} + C_{italicTotal}

…”

Section: Methodsmentioning

confidence: 99%

“…And the running cost is given by the following,

C_{italicRU} = C_{italicIC} ϕ

In the present study, n , i , t op , and φ values are taken as 2, 0.12, 3,150 (HPD) and 2,025 (WHR‐assisted HPD), and 0.8, respectively. Exergoeconomic factor is used to estimate the effect of non‐exergy cost on the total cost of a system component and is given by (Erbay & Hepbasli, 2017),

f_{italicex} = \frac{C_{Total}}{C_{x, T o t a l}}

The ratio of the exergy destruction cost to the equipment purchased cost is also an important parameter and given by (Ganjehsarabi et al., 2014),

R_{italicex} = \frac{E_{x, d e s t}}{italicPEC}

Cost ratio of any component of closed‐loop simple‐HPD and WHR‐assisted HPD can be estimated by,

{()(, CR)}_{k} = \frac{{(italicPEC)}_{k}}{{(italicPEC)}_{Total}}

…”

Section: Methodsmentioning

confidence: 99%

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Experiment on waste heat recovery‐assisted heat pump drying of food chips: Performance, economic, and exergoeconomic analyses

Singh

Sarkar

Sahoo

2020

J Food Process Preserv

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Novel waste heat recovery‐assisted heat pump dryer is designed, developed, and experimented in different operating modes. Energy, exergy, economic, and exergoeconomic parameters of the dryer with and without waste heat recovery are experimentally compared. Radish chips are dried to remove moisture from 93.5% to 10.5% at fixed dryer inlet air velocity. Both energy and exergy efficiencies are found highest for the waste heat recovery‐assisted (hybrid) system (56.26% and 35.9%, respectively). Specific moisture extraction rate (2.4 kg/kWh) and coefficient of performance (6.72) are highest for the hybrid system. The payback period for the hybrid system over the simple system is 33 months. The lowest exergoeconomic factor is for expansion devices in both simple and hybrid systems (0.0918 and 0.1348, respectively). Total exergy destruction costs for simple and hybrid systems are 0.10148 and 0.1266 $/h, respectively. The most important component that needs to improve based on the exergoeconomic factor is the drying chamber. Practical applications In the present study, a novel heat pump dryer assisted with waste heat recovery from the diesel engine is designed and developed. Various energy, exergy, economic, and exergoeconomic performance parameters with and without waste heat recovery are experimentally compared. To check the applicability, the radish chips have been dried to remove moisture from 93.5% to 10.5% at fixed dryer inlet air velocity. The testing shows that the proposed system is superior as compared to the simple heat pump dryer in terms of both energy and exergy efficiencies, specific moisture extraction rate, and overall heating coefficient of performance. The payback period for the proposed system over a simple one is found 3 years approximately. The proposed system can be a futuristic and promising solution for the drying applications, which satisfies two purposes: An effective way to utilize the engine waste heat and superior system performance.

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“…Hii, Law, and Suzannah () investigated the drying kinetics of the cocoa beans in HPD. Ganjehsarabi, Dincer, and Gungor () experimented on the heat pump tumble dryer for the wet cotton fabric to evaluate exergy performance. Bengtsson, Berghel, and Renström () experimented for evaluating the performance of the closed‐type heat pump tumble dryer.…”

Section: Introductionmentioning

confidence: 99%

Experimental energy‐exergy performance and kinetics analyses of compact dual‐mode heat pump drying of food chips

Singh

Sarkar

Sahoo

2020

J Food Process Engineering

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Batch-type heat pump dryer operating in both closed and open-cycle modes with improved tray design is developed to investigate the energetic and exergetic performances, and drying kinetics of banana and potato chips. Effects of drying time on various performances and drying kinetic parameters are presented. Coefficient of performance of heat pump as well as whole system is higher for open-cycle mode.Higher specific moisture extraction rate is obtained as 1.248 kg/kWh for closed cycle drying of banana chips. Drying efficiency is also found higher for the closed cycle.The specific energy consumption is lower (0.8 kWh/kg) in closed system drying for banana. Total exergy destruction is found higher for the closed system. Mass transfer coefficient and moisture diffusivity are better for the closed system. On the basis of studied performance parameters, the closed system drying is found better than the open system drying in humid and hot ambient conditions. Practical Applications: This study develops a heat pump dryer (HPD) operated with both closed and open-cycle modes, which can control the air recirculation to provide optimum main drying parameters to get the best drying performance. The novelty of this study is twofold: controlling of air recirculation to get optimum condition and improved design of trays in drying cabinet for best possible air distribution to get maximum SMER (the obtained SMER value is more than the reported SMER values of other developed prototypes available in the literature). The results have been evaluated to provide better information about the benefits of varying air recirculation in the HPD system. Drying kinetic has also been determined experimentally, which will be helpful for modeling potato and banana drying. This study will help to develop commercial HPD operated in closed/open mode depending on environmental conditions for food chips drying.

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Exergoeconomic Analysis of a Heat Pump Tumbler Dryer

Cited by 45 publications

References 27 publications

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

Experiment on waste heat recovery‐assisted heat pump drying of food chips: Performance, economic, and exergoeconomic analyses

Experimental energy‐exergy performance and kinetics analyses of compact dual‐mode heat pump drying of food chips

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