CO2 REFRIGERANT ECO-DESIGN OUTDOOR UNIT DEVELOPMENT FOR REFRIGERATED DISPLAY CABINET

Süleyman Erten; Melis Öder; Burak Can Temür; Buğra Koç

Makale detayları

CO2 REFRIGERANT ECO-DESIGN OUTDOOR UNIT DEVELOPMENT FOR REFRIGERATED DISPLAY CABINET

Yazarlar:

Süleyman Erten | Melis Öder | Burak Can Temür | Buğra Koç

Yayıncı:

Gazi University

Ana Başlıklar:

Enerji | Makine Tasarımı ve Makine Elemanları

Dergi:

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.12 Issue 2, pp.792-805

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001321583

pISSN:

2147-9526

Anahtar kelimeler:

Özet:

 Reducing the environmental impacts of energy systems and efficient use of energy are important for ecological balance. Standards and regulations in cooling systems limit the use of refrigerants, which consume energy, trap heat and increase global warming through the greenhouse effect. In refrigerated Display cabinets RDC, there has been a recent increase in the use of natural refrigerants, especially carbon dioxide, ammonia, hydrocarbons, etc. to reduce environmental impacts. With the developing refrigeration and chemical industries, different fluids with low global warming potential GWP and ozone depletion potential ODP values have begun to be used. Today, environmentally friendly refrigerants are preferred, especially carbon dioxide CO2 R744, which has a GWP value of 1 and an ODP value of 0, and has become an important alternative because it does not burn or ignite, and does not contain any toxic substances. In this sense in study, a compact eco-design outdoor unit containing multiple compressors was designed using CO2 R744, an environmentally friendly natural refrigerant, for refrigerated display cabinet in positive temperature PT -1 C  5 C  and negative temperature NT -15 C  -30 C  classes. The designed outdoor unit has the ability to synchronously operate RDCs in multiple different temperature classes in supermarkets. The designed central remote cooler with outdoor unit was tested in test rooms within the scope of TS EN ISO 23953-2: 2017 standard and its performance was analyzed using PS-NS compressors and multi-ejector system. Total energy consumption for coolers indoor units in PS and NS classes is calculated as 27.86 kWhday and 36.1 kWhday, respectively, and the energy classes are C and E classes, respectively. The maximum and minimum package temperatures for these coolers are in the range of -0.8  5 C and -16  -27 C respectively. As a result of the analyses, the required cooling loads at different temperatures were met and the temperature class specified within the scope of the standard was achieved for the products cooled in the cabinet. So, with this design, supermarket etc. by eliminating the need for an outdoor unit for each different temperature in refrigerated display cabinet in sales areas, a CO2 refrigerated cooling system that provides different temperature classes with a single system has been introduced.

 Reducing the environmental impacts of energy systems and efficient use of energy are important for ecological balance. Standards and regulations in cooling systems limit the use of refrigerants, which consume energy, trap heat and increase global warming through the greenhouse effect. In refrigerated Display cabinets RDC, there has been a recent increase in the use of natural refrigerants, especially carbon dioxide, ammonia, hydrocarbons, etc. to reduce environmental impacts. With the developing refrigeration and chemical industries, different fluids with low global warming potential GWP and ozone depletion potential ODP values have begun to be used. Today, environmentally friendly refrigerants are preferred, especially carbon dioxide CO2 R744, which has a GWP value of 1 and an ODP value of 0, and has become an important alternative because it does not burn or ignite, and does not contain any toxic substances. In this sense in study, a compact eco-design outdoor unit containing multiple compressors was designed using CO2 R744, an environmentally friendly natural refrigerant, for refrigerated display cabinet in positive temperature PT -1 C  5 C  and negative temperature NT -15 C  -30 C  classes. The designed outdoor unit has the ability to synchronously operate RDCs in multiple different temperature classes in supermarkets. The designed central remote cooler with outdoor unit was tested in test rooms within the scope of TS EN ISO 23953-2: 2017 standard and its performance was analyzed using PS-NS compressors and multi-ejector system. Total energy consumption for coolers indoor units in PS and NS classes is calculated as 27.86 kWhday and 36.1 kWhday, respectively, and the energy classes are C and E classes, respectively. The maximum and minimum package temperatures for these coolers are in the range of -0.8  5 C and -16  -27 C respectively. As a result of the analyses, the required cooling loads at different temperatures were met and the temperature class specified within the scope of the standard was achieved for the products cooled in the cabinet. So, with this design, supermarket etc. by eliminating the need for an outdoor unit for each different temperature in refrigerated display cabinet in sales areas, a CO2 refrigerated cooling system that provides different temperature classes with a single system has been introduced.

 Reducing the environmental impacts of energy systems and efficient use of energy are important for ecological balance. Standards and regulations in cooling systems limit the use of refrigerants, which consume energy, trap heat and increase global warming through the greenhouse effect. In refrigerated Display cabinets RDC, there has been a recent increase in the use of natural refrigerants, especially carbon dioxide, ammonia, hydrocarbons, etc. to reduce environmental impacts. With the developing refrigeration and chemical industries, different fluids with low global warming potential GWP and ozone depletion potential ODP values have begun to be used. Today, environmentally friendly refrigerants are preferred, especially carbon dioxide CO2 R744, which has a GWP value of 1 and an ODP value of 0, and has become an important alternative because it does not burn or ignite, and does not contain any toxic substances. In this sense in study, a compact eco-design outdoor unit containing multiple compressors was designed using CO2 R744, an environmentally friendly natural refrigerant, for refrigerated display cabinet in positive temperature PT -1 C  5 C  and negative temperature NT -15 C  -30 C  classes. The designed outdoor unit has the ability to synchronously operate RDCs in multiple different temperature classes in supermarkets. The designed central remote cooler with outdoor unit was tested in test rooms within the scope of TS EN ISO 23953-2: 2017 standard and its performance was analyzed using PS-NS compressors and multi-ejector system. Total energy consumption for coolers indoor units in PS and NS classes is calculated as 27.86 kWhday and 36.1 kWhday, respectively, and the energy classes are C and E classes, respectively. The maximum and minimum package temperatures for these coolers are in the range of -0.8  5 C and -16  -27 C respectively. As a result of the analyses, the required cooling loads at different temperatures were met and the temperature class specified within the scope of the standard was achieved for the products cooled in the cabinet. So, with this design, supermarket etc. by eliminating the need for an outdoor unit for each different temperature in refrigerated display cabinet in sales areas, a CO2 refrigerated cooling system that provides different temperature classes with a single system has been introduced.

 Enerji sistemlerinin çevresel etkilerinin azaltılması ve enerjinin verimli kullanımı ekolojik denge açısından önemlidir. Soğutma sistemlerindeki standartlar ve yönetmelikler, enerji tüketerek ısıyı hapseden ve sera etkisiyle küresel ısınmayı artıran soğutucu akışkanların kullanımını sınırlamaktadır. Teşhir tipi soğutucularda TTS, son zamanlarda çevresel etkileri azaltmak amacıyla doğal soğutucu akışkanlar, özellikle karbondioksit, amonyak, hidrokarbonlar vb. kullanımına yönelik çalışmalar artmıştır. Gelişen soğutma ve kimya endüstrileriyle birlikte, düşük küresel ısınma potansiyeli KIP ve ozon delme potansiyeli ODP değerlerine sahip farklı akışkanlar kullanılmaya başlanmıştır. Günümüzde çevre dostu soğutucu akışkanlar tercih edilmekte olup, özellikle karbon dioksit CO2 R744, KIP değerinin 1, ODP değerinin 0 olması aynı zamanda yanma ve tutuşma özelliğine sahip olmamakla birlikte toksit içerikli herhangi bir madde içermemesi nedeniyle önemli bir alternatif haline gelmiştir. Bu anlamda çalışmada, pozitif sıcaklık PS -1 C  5 C  ve negatif sıcaklık NS -15 C  -30 C  sınıflarındaki teşhir tipi soğutucular için çevre dostu doğal soğutucu akışkan olan CO2 R744 kullanılarak, birden fazla kompresörü içeren eko-tasarıma uygun kompakt bir dış ünite tasarlanmıştır. Tasarlanan dış ünite, süpermarketlerde birden fazla farklı sıcaklık sınıfındaki TTSleri senkronize olarak çalıştırabilme özelliğine sahiptir. Tasarlanan dış üniteli merkezi remote soğutucu TS EN ISO 23953-2: 2017 standardı kapsamında test odalarında test edilmiş ve PS-NS kompresörleri ve multi-ejektör sistemi kullanılarak performansı analiz edilmiştir. PS ve NS sınıflarındaki soğutucular iç üniteler için toplam enerji tüketimleri sırasıyla 27,86 kWhgün ve 36,1 kWhgün olarak hesaplanmış ve enerji sınıfları ise sırasıyla C ve E sınıfıdır. Bu soğutucular için maksimum ve minimum paket sıcaklıkları sırasıyla -0,8  5 C ve -16  -27 C aralığındadır. Yapılan analizler neticesinde istenilen farklı sıcaklıklardaki soğutma yükleri karşılanmış ve kabin içinde soğutulan ürünlerin standart kapsamında belirtilen sıcaklık sınıfını sağlanmıştır. Böylece, bu tasarım ile süpermarket vb. satış alanlarında teşhir tipi soğutucularda farklı her bir sıcaklık için bir dış ünitenin önüne geçilerek, tek bir sistem ile farklı sıcaklık sınıflarını sağlayan CO2 soğutkanlı bir soğutma sistemi ortaya konmuştur.

Makale detayları

CO2 REFRIGERANT ECO-DESIGN OUTDOOR UNIT DEVELOPMENT FOR REFRIGERATED DISPLAY CABINET

Yazarlar:

Süleyman Erten | Melis Öder | Burak Can Temür | Buğra Koç

Yayıncı:

Gazi University

Ana Başlıklar:

Enerji | Makine Tasarımı ve Makine Elemanları

Dergi:

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.12 Issue 2, pp.792-805

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001321583

pISSN:

2147-9526

Refrigeration

Refrigerated Display Cabinet

Carbon Dioxide

RefrigerantSoğutma

Teşhir Tipi Soğutucu

Karbondioksit

Soğutucu Akışkan

Sayı

Makale detayları

Yazarlar: Süleyman Erten | Melis Öder | Burak Can Temür | Buğra Koç

Yayıncı: Gazi University

Ana Başlıklar: Enerji | Makine Tasarımı ve Makine Elemanları

Dergi: Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.12 Issue 2, pp.792-805

Belge Tipi: Makale

Yayın Tarihi: 6/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001321583

pISSN: 2147-9526

Sayı

Yazarlar:

Süleyman Erten | Melis Öder | Burak Can Temür | Buğra Koç

Yayıncı:

Gazi University

Ana Başlıklar:

Enerji | Makine Tasarımı ve Makine Elemanları

Dergi:

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.12 Issue 2, pp.792-805

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001321583

pISSN:

2147-9526