Design of refrigeration system using refrigerant R134a for macro compartment

Rani, Mukta; Razlan, Z. M.; Shahriman, A. B.; Yong, Cao; Harun, A.; Hashim, M S M; Faizi, M K; Ibrahim, I.; Kamarrudin, N S; Saad, Mohd Sazli; Zunaidi, I.; Wan, Wei; Hazry, D.

doi:10.1088/1742-6596/908/1/012054

Cited by 3 publications

(5 citation statements)

References 4 publications

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“…Based on the structural layout of the cogeneration cycle in the Mollier diagram field [55,56], it can be speculated that the Dry parameters of the working material have a less favorable enthalpy proportion compared to the other types in the cycle section in superheated vapor and condensation areas (cooling and condensation line), from one side, and in the liquid heating and evaporation zones (preparation to get in the gas heat exchanger line), from the other side.…”

Section: Discussionmentioning

confidence: 99%

Research of Organic Rankine Cycle Energy Characteristics at Operating Modes of Marine Diesel Engine

Lebedevas

Čepaitis

2021

JMSE

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The publication examines one of the most effective ways to decarbonize marine transport, specifically the secondary heat sources utilization in the cogeneration cycle of the main engines. The research focuses on the optimization of Organic Rankine Cycle (ORC) performance parameters by combining them with the exhaust energy potential of a medium speed four-stroke main diesel engine in ISO8178 (E3) load cycle modes. Significant advantages were not found between the evaluated Wet-, Isentropic-, and Dry-type liquids (R134a, R141b, R142b, R245fa, Isopentane) in terms of ORC energy performance with a 10% difference. The use of a variable geometry turbogenerator turbine with Dry-type (R134a) working fluid is characterized by the highest ORC energy efficiency up to 15% and an increase in power plant (including turbogenerator generated mechanical) by 6.2%. For a fixed geometry turbine, a rational control strategy of the working fluid flow (Gd.sk − πT) is determined by the priorities of the power plant in certain load modes. The influence of the overboard water temperature on the ORC energy indicators does not exceed ±1%; however, it influences the thermodynamic saturation parameters of the working fluid condensation and, in connection with that, the fluid selection.

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Section: Discussionmentioning

confidence: 99%

Research of Organic Rankine Cycle Energy Characteristics at Operating Modes of Marine Diesel Engine

Lebedevas

Čepaitis

2021

JMSE

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“…Some studies focused on solar refrigeration in rural areas with inadequate electricity supply [6][7][8][9]. For example, one study developed a solar refrigeration system for rural villages in Palestine.…”

Section: Literature Reviewmentioning

confidence: 99%

“…A Malaysian study found that micro compartments decrease the time needed to reach setpoint temperature [9]. The study focused on an R134a refrigeration system with 150 × 150 × 250 mm macro compartments.…”

Section: Literature Reviewmentioning

confidence: 99%

The solar powered refrigerator and heat pump for urban street vendors

2023

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This article proposes an integrated solar PV refrigerator and heat pump (ISPVRHP) for Sub-Saharan African food vendors; the warm chamber would keep prepared food warm until the food is sold, while the cold chamber would minimise food spoilage. The ISPVRHP proposed in this article can cool water or other beverages and be capable of utilising the heat rejected to the atmosphere by the condenser for warming food. The ISPVRHP was modelled using ANSYS software, and the results were validated experimentally. The results show that both systems work well at peak hours, especially under more intense sun rays. The study found that the variation of incident solar radiation and ambient temperature has significant effects on the performance of the ISPVRHP; the wind speed, however, has only a minor impact on the total heat load of the system. In addition, the systems (cooling and heating) reached the desired temperatures and maintained them for long periods. The capacity of the refrigeration system can be increased by increasing the component sizes, including the PV system size. The ISPVRHP performance dropped substantially when the doors remained open for extended periods due to loss of energy through mass transfer.

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“…Ev tipi buzdolaplarında kullanılan yoğuşturucular, genellikle 3/16'' (4,76 mm) veya 1/4'' (6,35 mm) çaplı içi ve dışı çift katlı bakır borulardan oluşur [12]. Çift katlı bakır borulardan oluşmuş örnek bir yoğuşturucu, Şekil 2'de gösterilmiştir [13].…”

Section: Ev Ti̇pi̇ Bi̇r Buzdolabinin Tasarim Kri̇terleri̇unclassified

“…Soğutucu akışkan girişi Şekil 2. Çift Katlı Bakır Borulu Yoğuşturucu [13] tüketiminin düşmesine destek verir [6]. Ayrıca yoğuşturucu fanı da ısı transferinin iyileşmesi noktasında enerji tüketiminin düşmesine destek vermektedir.…”

Section: Soğutucu Akışkan çıKışıunclassified

Design and Analytical Examination of a Household Refrigerator

Akkaya

Çamdalı

2021

Mühendis Ve Makina

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Bu çalışmada, ev tipi bir buzdolabının analitik incelemesi yapılmıştır. Bu bağlamda buzdolabının soğutma yükü hesaplanmış, ana ve yardımcı elemanları seçilmiş ve tasarlanan buzdolabının enerji tüketim değeri de belirlenmiştir. Soğutma yükünü meydana getiren; iletim (transmisyon) ısı yükü, ürün ısı yükü, hava değişim (infiltrasyon) ısı yükü ve diğer ısı yüklerinin, buzdolabının soğutucu ve dondurucu bölümlerinde oluşturdukları etkiler hesaplanmıştır. Ayrıca, soğutma yükünü oluşturan; her bir ısı yükünün, toplam soğutma yüküne olan etkisi ortaya konmuştur. Toplam soğutma yükünün, iletim ısı yükü % 39,85'ini, ürün ısı yükü %25,90'ını, hava değişim (infiltrasyon) ısı yükü ise %20,74'ünü oluşturduğu görülmüştür. Geriye kalan %13,51'i de diğer yükler oluşturmaktadır.Çalışmada literatürdeki değerler, TSE EN 62552 standartı ile birlikte ülkemizde buzdolabı üretimini gerçeleştiren bir firmanın, kullandığı yöntemler göz önünde bulundurulmuştur. Çalışmanın sonunda da söz konusu bilgiler ile buzdolabının enerji tüketimi göz önüne alınarak enerji sınıfının A++ olduğu belirlenmiştir.

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Design of refrigeration system using refrigerant R134a for macro compartment

Cited by 3 publications

References 4 publications

Research of Organic Rankine Cycle Energy Characteristics at Operating Modes of Marine Diesel Engine

Research of Organic Rankine Cycle Energy Characteristics at Operating Modes of Marine Diesel Engine

The solar powered refrigerator and heat pump for urban street vendors

Design and Analytical Examination of a Household Refrigerator

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