Two Analytical Methods for Optimising Solar Process Heat System Used in a Pasteurising Plant

Ghabour, Rajab; Josimović, Ljubiša; Korzenszk, Péter

doi:10.18485/aeletters.2021.6.4.4

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Renewable technologies can supply consistent, self-sufficient electricity to remote places. For example, the willingness to support new renewable energy projects grew in Hungary since it proved to be a good financial investment with a payback period of less than ten years [3,4]. It became evident that using renewable energy sources is the best approach to comply with the Kyoto Protocol.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling and Experimentation of Soy Wax 68℃ Encapsulated into Solar Tank (Case Study)

Ghabour,

Amer,

Korzenszky

2023

HAE

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Governments worldwide are attempting to minimise CO2 emissions, and solar energy storage remains the most difficult problem to tackle in the current climate. Typically, domestic hot water is mainly used for heat process services in colder climates when the tank loss is significant. Any design modification can result in a higher solar yield. Since water is a perfect medium for heat storage, this article will examine different Solar Domestic Hot Water (SDHW) systems in cold climates such as Central Europe and hot and dry climates such as the Middle East (Syria). Linear modelling was conducted using R script software using coded values to define the optimal value using the response surface method (RSM). The programming phase uses the least-squares approach to provide a general rationale for the line's best-match position among the data points under consideration. For each variable, the coded values range from [-1, +1]. The number of experiments is determined by the formula 2k , where k is the variable number. Since each variable has two possible values [-1, +1], the total number of experiments was 23= 8. In addition to these experiments, we performed one more experiment for defining second-degree non-linear coefficients. The second-degree factors were checked to evaluate the non-linearity of the system. The experimental work was done in the laboratory; an insulated water tank filled with 5 litres of water was used. A capsulated PCM soy wax 68℃ test was conducted. For the charging phase, the response surface approach with non-linear correlation was used to determine the optimal number of samples and PCM quantity at two temperature levels. The results of temperature, sample numbers, and wax quantity demonstrate a 0.22, 2.3, and -1.12 first-degree magnitude effect, respectively. In addition, each two-factor interaction contour plot is depicted.

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Section: Introductionmentioning

confidence: 99%

Mathematical Modelling and Experimentation of Soy Wax 68℃ Encapsulated into Solar Tank (Case Study)

Ghabour,

Amer,

Korzenszky

2023

HAE

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“…In agriculture, there are dryers that use renewable sources of energy in the drying process, such as the use of corn cobs [24], residues from vineyards and orchards [25], the use of solar collectors [26][27][28][29], etc. Also, there are dryers which work on the principle of combined heat exchanger [30,31].…”

Section: Introductionmentioning

confidence: 99%

Heat Balance of Combined Heat Exchanger Aerodynamic Heating Dryers

Купреенко¹,

Isaev²,

Kuznetsov³

et al. 2022

adeletters

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Today, the use of aerodynamic dryers for drying various types of fruit crops is very current. In them, the electric energy spent on the drive of the centrifugal fan is transformed into thermal energy due to the mutual friction of the air flows circulating in the closed chamber. In order to increase the energy efficiency of the drying process, the heat of the waste drying agent was used in the research. The presented dryer was equipped with a combined heat exchanger. In order to predict the thermal performance of the combined heat exchanger depending on external factor variables, the dependence of the temperature of the fresh drying agent at the outlet of the combined heat exchanger on the dryer operation time is theoretically determined on the basis of the heat balance equation. The air solar collector in the combined heat exchanger made it possible to increase the temperature of the drying agent at the outlet by another 10oC without extra costs of electrical energy. A comparative analysis of the results of experimental and theoretical studies showed their high convergence.

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“…In Europe, heat demand in the industrial sector has exceeded 27% [5], while the building sector consumes about 55% of heat energy for heating and cooling [6]. In the sector of hospital buildings, they continuously consume large amounts of energy for the needs of heating, cooling, lighting, etc.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Solar Plant for the Production of Hot Consumption Water for the Hospital

Blagojević¹,

Dihovicni²,

Krunić³

2022

adeletters

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The paper presents and analyzes the efficiency of a solar plant for the production of thermal energy, ie the preparation of hot water (DHW) in the hospital in Subotica. At the analyzed facility, solar collectors provide the complete needs of the hospital for hot water from spring to autumn, while in the second part of the year, the required thermal energy is obtained from additional sources. The solar plant consists of 144 solar collectors, where the total gross area of the collector is 362.6 m 2 and the installed power of the plant is 253.8 kW. During the analyzed period from 2014 to 2017, a total of 558 MWh of thermal energy was produced, ie energy equivalent to 58,613.43 kg of fuel oil was saved. This thermal energy was used for the needs of the kitchen, laundry, central sterilization, heating of the operating room, and etc.

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Two Analytical Methods for Optimising Solar Process Heat System Used in a Pasteurising Plant

Cited by 3 publications

References 13 publications

Mathematical Modelling and Experimentation of Soy Wax 68℃ Encapsulated into Solar Tank (Case Study)

Mathematical Modelling and Experimentation of Soy Wax 68℃ Encapsulated into Solar Tank (Case Study)

Heat Balance of Combined Heat Exchanger Aerodynamic Heating Dryers

Analysis of a Solar Plant for the Production of Hot Consumption Water for the Hospital

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