Design and performance of a small-scale solar ice-maker based on a DC-freezer and an adaptive control unit

Torres-Toledo, Victor; Meissner, Klaus; Täschner, Philip; Martínez-Ballester, Santiago; Müller, Joachim

doi:10.1016/j.solener.2016.10.022

Cited by 16 publications

(5 citation statements)

References 11 publications

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“…The simulation model of the solar battery and the charge controller was set according to Sukamongkol et al [20]. Based on the climate data input, the voltage of the PV modules, state-of-charge (SOC) of the battery, and fan performance were simulated [21].…”

Section: Simulation Of the Photovoltaic Energy Supply Systemmentioning

confidence: 99%

Technical Performance of an Inflatable Solar Dryer for Drying Amaranth Leaves in Kenya

et al. 2019

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The technical performance of an inflatable solar dryer (ISD) to dry amaranth leaves (Amaranthus spp.) was investigated. To handle the drying of lightweight materials, modification was made by adding an air deflector and trays inside the ISD. Computational performance of the ISD solar energy system was evaluated using MATLAB Simulink. The estimated air mass flow in the inlet of the ISD was 0.75 kg/s. Using computational fluid dynamics (CFD), the uniformity of air distribution in the ISD was evaluated. The solar radiation reported during good drying performance ranged between 510 and 950 W/m2. In a controlled charging system, a 100 Wp PV module typically generated voltage between 10.22 and 18.75 V. Drying conditions at temperatures of 40 °C or above were typically achieved in the ISD from 12:00 to 16:00. Temperature inside the ISD could reach up to 69.4 °C during the day and 13.4 °C during the night. The highest relative humidity of 97.4% was recorded during the night. Opening the ISD while mixing the product could lead to considerable heat loss. Fluctuation of solar radiation and shaded areas in the ISD appeared to be the major factors affecting the drying performance.

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Section: Simulation Of the Photovoltaic Energy Supply Systemmentioning

confidence: 99%

Technical Performance of an Inflatable Solar Dryer for Drying Amaranth Leaves in Kenya

et al. 2019

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“…The effect of this flow variation with R410 showed a COP as high as 4. Torres-Toledo et al [ 74 ] developed an ice maker based on a DC-freezer and adaptive controller. This controller unit helped the system enhance ice production efficiently under various weather conditions.…”

Section: Refrigeration Cycles Powered By Photovoltaicmentioning

confidence: 99%

Photovoltaic and Photovoltaic Thermal Technologies for Refrigeration Purposes: An Overview

Alsagri

2022

Arab J Sci Eng

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Refrigeration systems have a broad range of applications, playing a critical role in human life. Especially, vaccine preservation in rural regions has become more critical than in the past during the COVID19 era. In this sense, meeting the cooling process's energy need with renewable energy is critical, as the grid cannot support it. Thus, solar energy has been extensively studied for use in refrigeration cycles. Compression, absorption, adsorption, desiccant, and ejector refrigeration cycles are frequently used in this configuration. This article discusses multiple studies showing various attributes' impact on a system's overall efficiency. Most previous reviews did not cover PV with refrigeration cycles. So, this paper surveys the literature on PV-powered cooling cycles. For better classification, PV technologies are categorized into three types: PV, PVT, and CPVT. With this regard, CPVTs still have a way to progress due to a lack of studies compared to PV. The works are divided into three main sections as Exergy Studies, Experimental Studies, and Simulation and Numerical Studies. This review paper categorizes and rates refrigeration-assisted solar systems based on exergy destruction, exergy efficiency, and COP of cooling cycles. The results showed that PV panels have the highest exergy destruction in most of the systems. It is concluded that using PV technologies has a great potential to supply cooling demand, especially in a hot climate condition. Moreover, the study's findings are anticipated to aid designers in scaling up photovoltaic-based cooling systems, resulting in more efficient and sustainable designs.

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“…The solar refrigerator reached the maximum COP of 2.10 at 7:00 am. Currently, researchers have researched photovoltaic air conditioning [12,13], solar ice makers [14,15], and solar refrigerators [11,16]. The system performance of the solar photovoltaic refrigeration system with the battery bank was studied by researchers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Refrigeration Performance of the Refrigerated Warehouse with Ice Thermal Energy Storage Driven Directly by Variable Photovoltaic Capacity

Liang¹,

Wang³

et al. 2022

International Journal of Photoenergy

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An independent solar photovoltaic (PV) refrigerated warehouse system with ice thermal energy storage is constructed in this paper. In this system, the vapour compression refrigeration cycle is directly driven by a PV array, and the frequency of the compressor varies with the solar radiation intensity. The refrigeration performance and the matching characteristics of the system driven by different PV capacities are studied. The results show that the intensity of solar radiation required for the compressor to work at the same frequency decreases by approximately 7.8% when the ratio of PV capacity to compressor-rated power increases by 10%, and the time required for the temperature in the refrigerated warehouse to drop from ambient temperature to 0°C is reduced by 32 min on average. The energy efficiency ratio of the vapour compression refrigeration subsystem and the coefficient of performance (COP) of the refrigerated warehouse system increase with the ratio of PV capacity to compressor-rated power α. When α increases from 1 to 1.3, the growth rate of the COP is very slow. For the PV direct-drive refrigerated warehouse system with a compressor-rated power of 4.4 kW, the suitable ratio of PV capacity to compressor-rated power α is about 1.3. When the refrigerated warehouse system is driven directly by a 5.4 kW PV array, the overall COP is approximately 0.19. In the cycle mode of refrigeration and cold energy storage during the day and cold energy release at night, the stored cold energy can still meet the refrigeration required by the load for 48 hours after eight days of continuous operation. According to the current market price of cold storage, during the service life of the system, the income per unit volume of cold storage is about 2.2 times the investment.

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Design and performance of a small-scale solar ice-maker based on a DC-freezer and an adaptive control unit

Cited by 16 publications

References 11 publications

Technical Performance of an Inflatable Solar Dryer for Drying Amaranth Leaves in Kenya

Technical Performance of an Inflatable Solar Dryer for Drying Amaranth Leaves in Kenya

Photovoltaic and Photovoltaic Thermal Technologies for Refrigeration Purposes: An Overview

Analysis of the Refrigeration Performance of the Refrigerated Warehouse with Ice Thermal Energy Storage Driven Directly by Variable Photovoltaic Capacity

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