Exergy Analysis on Simultaneous Charging and Discharging of Solar Thermal Storage for Drying Application

Tambunan, Armansyah H.; Manalu, Lamhot P.; Kadri, Abdullah

doi:10.1080/07373937.2010.506171

Cited by 24 publications

(6 citation statements)

References 12 publications

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“…Exergy analysis utilizes the concepts of conservation of mass and energy together with the second law of thermodynamics. Several studies have been published on the use of exergy analysis for various drying processes and systems [13][14][15][16][17][18][19][20][21][22][23]. The outcomes of previously published researches indicate that drying processes can be satisfactorily designed and optimized using exergy analysis.…”

Section: Introductionmentioning

confidence: 91%

Improving exergetic performance parameters of a rotating-tray air dryer via a simple heat exchanger

Ghasemkhani

Keyhani

Aghbashlo

et al. 2016

Applied Thermal Engineering

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Highlights: Exergy analysis of a rotating-tray air dryer fitted with a simple air-to-air heat exchanger  Effect of drying air temperature and velocity on exergetic efficiency of the dryer  Promising improvement of exergetic performance parameters of the dryer using the heat exchanger  Potential application of the proposed strategy for recovering waste energy in drying technology AbstractIn this study, exergy analysis was applied for a rotating-tray dryer equipped with a cross-flow plate heat exchanger during drying of apple slices. Three drying air temperatures and tray rotation speeds in the range of 50-80 °C and 0-12 rpm, respectively, were employed. Two drying air velocities in the range of 1-2 m/s were adjusted for each drying temperature and rotation speed with and without application of the heat exchanger. The experiments were conducted to assess the effects of the experimental variables on the exergetic performance parameters of the dryer. Also, the effect of drying conditions on the quality of dried apple slices was assessed by determining rehydration ratio, apparent density, shrinkage, and surface color. In general, the exergetic performance parameters of the dryer depended profoundly on the drying air temperature and velocity. Interestingly, the exergetic efficiency of drying process was significantly improved from a minimum value of 23.0% to a maximum value of 96.1% by using the heat exchanger. Furthermore, the incorporation of heat exchanger did not negatively affect the quality of dried product. Therefore, the strategy presented herein could be a promising approach for waste energy recovery in drying without any unfavorable change in the quality of dried product.

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Section: Introductionmentioning

confidence: 91%

Improving exergetic performance parameters of a rotating-tray air dryer via a simple heat exchanger

Ghasemkhani

Keyhani

Aghbashlo

et al. 2016

Applied Thermal Engineering

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“…New paradigm in the design of thermal system is by the application of the first and second law of thermodynamics, called as exergy analysis (Tambunan et al 2010). Exergy analysis is performed for identification of exergy streams, which can be used as a rational basis for assigning and yielding in exergy efficiency.…”

Section: Introductionmentioning

confidence: 99%

Valuation of Waste Oil Palm Biomass for Energy in Palm Oil Mill in Indonesia

Tambunan

2019

IJOP

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Valuation of biomass and its waste is indispensable for sustainable development of bioenergy in Indonesia. The objective of this research is to estimate the value of biomass, mainly from oil palm waste, for supporting bioenergy development in Indonesia. The research was applying thermodynamic theory to reinterpret the economic valuation by exergonomic analysis on biomass conversion to electricity. The results revealed that exergonomic value of electricity generated from oil palm fiber was 5 cents USD kWh -1 , while the steam was 0.46 cents US kWh -1 , under the assumption of zero biomass value. When the value of electricity was at its production base cost, the biomass (i.e. oil palm fiber) could be valuated to Rp 296.57 per kWh of its exergy content, or Rp 1 764.73 kg -1 of the biomass. The real price of shell in the field was Rp 700 kg-1. The results show that either the oil palm fiber is undervalued or the production cost of electricity generated from the fiber could be lower.

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“…Most food process-related publications using ExA focus on drying technologies (66%), followed by food chains having wider boundaries (10%) and heating/pasteurization processes (6%) [22]. Conducting ExA for analyzing drying performance firstly introduced in Indonesia was for analyzing application of solar thermal storage [23]. Tea is the second most consumed non-alcoholic drink, after water, in the world [24,25] which the main process was drying.…”

Section: Introductionmentioning

confidence: 99%

The renewability indicator and cumulative degree of perfection for gamboeng tea; part.1, exergy calculation of fresh tea leaf

Bardant

Haq²,

Setiawan

et al. 2018

E3S Web Conf.

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Renewability Indicator (RI) and Cumulative Degree of Perfection (CDP) are employed as tools to assess sustainability of Gamboeng Tea. The assessment then compared with black tea process in Black Sea Region in Turkey from the previous study. Exergy analysis for Gamboeng tea was decribed in two part of articles. This first part was desribing the energy and exergy calculation for producing fresh tea leaf in Gamboeng tea plantation. The energy and exergy utilization for black sea fresh tea leaves was calculated to be 807.83 MJ/t of fresh leaf, 273.43MJ/t of fresh leaf, respectively. For the Gamboeng green tea, the energy and exergy utilization were 1496.38 MJ/ t of fresh leaf and 821.86 MJ/t of fresh leaf, respectively.The second part desribed cooperation of wood pellet with ambient-adapting controller uin tea factorywas a contribution from Gamboeng Tea for achieving Sustainable Development Goal which is affordable and clean energy and also an applicable climate action.

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Exergy Analysis on Simultaneous Charging and Discharging of Solar Thermal Storage for Drying Application

Cited by 24 publications

References 12 publications

Improving exergetic performance parameters of a rotating-tray air dryer via a simple heat exchanger

Improving exergetic performance parameters of a rotating-tray air dryer via a simple heat exchanger

Valuation of Waste Oil Palm Biomass for Energy in Palm Oil Mill in Indonesia

The renewability indicator and cumulative degree of perfection for gamboeng tea; part.1, exergy calculation of fresh tea leaf

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