Variant analysis of financial and energy efficiency of the heat recovery system and domestic hot water preparation for a single-family building: The case of Poland

Piotrowska, Beata; Słyś, D.

doi:10.1016/j.jobe.2022.105769

Cited by 6 publications

(16 citation statements)

References 22 publications

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“…This is probably due to the fact that the relationship between these parameters (T cw , T dw ) and the effectiveness value (ε) of the greywater heat exchanger is close to a linear relationship. This is also confirmed by other studies [32,41]. In the case of near-linear relationships, artificial neural networks may have greater ability to extrapolate because the pattern they must learn to recognize and reproduce is relatively simple.…”

Section: Artificial Neural Network In Predicting the Effectiveness Of...supporting

confidence: 83%

“…The determined effectiveness was the higher, the lower the water and greywater flow rate through this unit. Similar conclusions with regard to horizontal heat exchangers were reached by Piotrowska and Słyś [41]. This trend is also maintained for vertical GHEs [21] and plate heat exchangers [19].…”

Section: Characteristics Of the Greywater Heat Exchangersupporting

confidence: 80%

“…The determined effectiveness was the higher, the lower the water and greywater flow rate through this unit. Similar conclusions with regard to horizontal heat exchangers were reached by Piotrowska and Słyś [41]. This trend Experimental tests showed that the effectiveness of the greywater heat exchanger ranged from 19.37% to 36.94%, depending on the operating conditions of the system and the value of the linear bottom slope.…”

Section: Characteristics Of the Greywater Heat Exchangersupporting

confidence: 78%

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Evaluation of the Suitability of Using Artificial Neural Networks in Assessing the Effectiveness of Greywater Heat Exchangers

Starzec,

Kordana-Obuch,

Piotrowska

2024

Sustainability

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The use of greywater heat exchangers (GHEs) is an effective way to reduce energy consumption for heating domestic water. However, the available characteristics of this type of device are often insufficient and consider only a few selected parameters of water and greywater, which results in the need to look for tools enabling the determination of the effectiveness of GHEs in various operating conditions with incomplete input data. The aim of this paper was to determine the usefulness of artificial neural networks (ANNs). For this purpose, comprehensive experimental tests were carried out on the effectiveness of the horizontal heat exchanger, taking into account a wide range of water and greywater flow rates and temperatures of these media, as well as the linear bottom slope of the unit, which allowed for the creation of a database of 32,175 results. Then, the feasibility of implementing the full research plan was assessed using ANNs. The analysis showed that the impact of the media temperatures on the heat exchanger effectiveness values obtained using ANNs is limited, which makes it possible to significantly reduce the number of necessary experiments. Adopting only three temperature values of at least one medium allowed the generation of ANN models with coefficient values R2 = 0.748–0.999 and RMSE = 0.077–1.872. In the case of the tested GHE, the slope and the flow rate of the mixed water are of key importance. However, even in the case of parameters of significant importance, it is possible to reduce the research plan without compromising the final results. Assuming five different values for each of the four input parameters (a total of 625 combinations) made it possible to generate an ANN model (R2 = 0.993 and RMSE = 0.311) with high generalization ability on the full research plan covering 32,175 cases. Therefore, the conducted analysis confirmed the usefulness of ANNs in assessing the effectiveness of GHEs in various operating conditions. The approach described in this paper is important for both environmental and economic reasons, as it allows for reducing the consumption of water and energy, which are necessary to carry out such scientific research.

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Section: Artificial Neural Network In Predicting the Effectiveness Of...supporting

confidence: 83%

Section: Characteristics Of the Greywater Heat Exchangersupporting

confidence: 80%

“…The determined effectiveness was the higher, the lower the water and greywater flow rate through this unit. Similar conclusions with regard to horizontal heat exchangers were reached by Piotrowska and Słyś [41]. This trend Experimental tests showed that the effectiveness of the greywater heat exchanger ranged from 19.37% to 36.94%, depending on the operating conditions of the system and the value of the linear bottom slope.…”

Section: Characteristics Of the Greywater Heat Exchangersupporting

confidence: 78%

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Evaluation of the Suitability of Using Artificial Neural Networks in Assessing the Effectiveness of Greywater Heat Exchangers

Starzec,

Kordana-Obuch,

Piotrowska

2024

Sustainability

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“…Konutlarda oluşan ısı değeri yüksek gri suyun %80-%90'nı duş başlığı kaynaklı meydana gelmektedir [161]. Bir araştırmaya göre atık sıcak sudan ısı geri kazanımı (DWHR) sisteminin kullanılması ile sıcak su üretiminde kullanılan enerji %26,3 oranında azaltılabilmektedir [162]. Bu sistem ile özellikle duşta kullanılan atık sıcak suyun ısı enerjisi geri kazanılarak, kombi veya şofben kazanında bulunan soğuk suyun ön ısıtılmasında kullanılmaktadır.…”

Section: Su Tüketi̇mi̇ (Water Consumption)unclassified

Binalarda Enerji Verimliliğinde Son Gelişmeler: Türkiye Örneği

Yıldız

2024

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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2021 yılındaki ortalama küresel sıcaklık değerinin, sanayi devrimi öncesi döneme göre üst üste yedinci kez (2015–2021) 1 ℃’nin üzerinde seyretmesi, artış miktarının 1.5 ℃’de tutulması gerektiğini nedenleriyle ortaya koyan Paris Anlaşması’nın önemini artırmaktadır. Anlaşma ile belirlenen hedeflere ulaşmaya çalışan Avrupa Birliği’nde, binaların enerji tüketiminin %40'ından, sera gazı emisyonlarının ise %36'sından sorumlu olması, bu alandaki enerji verimliliği çalışmalarının hız kazandırmaktadır. Binaların yaşam döngüsü boyunca neden oldukları karbon emisyonlarını en büyük kısmının %70 ile işletme aşamasında oluşması, enerji verimliliği politikalarına temel teşkil etmektedir. Bu derlemede, küresel enerji tüketimi ve karbon salınımının başlıca sorumlularından olan konut sektöründeki güncel enerji verimliliği çalışmalarıyla ilgili yerli ve yabancı kaynaklar taranarak, ulaşılan olası çözüm önerileri başlıklar altında aktarılmıştır. Araştırmalar sonucunda, bina cephelerinde yapılacak yalıtım çalışması ile ısıtma giderlerinde %12-47, eski tip ampulleri yeni nesil LED ampuller ile yenileyerek aydınlatma kaynaklı elektrik tüketiminde %50-75, fuel oil kullanan verimsiz kazanların modern biyoyakıt kazanlarıyla değiştirilmesiyle de yakıt giderlerinde %20 ile %30 arasında tasarruf sağlanabileceği tespit edilmiştir. Çalışmanın devamında, Türkiye’nin enerji görünümü, yürürlükte olan verimlilik politikaları ile güncel konut istatistikleri derlenerek, binalardaki enerji verimliliğini artırmaya yönelik çalışmalar yürütecek akademi ve özel sektör çalışanlarına katkıda bulunulması amaçlanmıştır. Konut sektörünün önemli bir tüketim kalemini oluşturduğu Türkiye’de, bu alanındaki en kapsamlı yasal düzenleme 2007 yılında yayınlanan 5627 sayılı Enerji Verimliliği Kanunu'dur. Bir çok araştırmacı, enerji verimliliği uygulamalarında karşılaşılan zorlukların çoğunlukla yönetmelik ve yönergelerin eksikliğinden değil, başta hane halkının yapılacak iyileştirmeler hakkında yeterince bilgilendirilmemesi olmak üzere, çalışmaların uygulanması sırasında yaşanan sıkıntılardan kaynaklandığı sonucuna varmıştır. Yapı stoğunun %62,8’i ilgili yönetmeliklerden öncesine ait olan Türkiye’de, geniş ölçekli bir yenileme hareketi ile yıllık 7 milyar doların üzerinde bir tutarın boşa harcanmasının önüne geçilebileceği tespit edilmiştir.

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“…There are several solutions aimed at balancing fluctuations in energy production, both on a daily and seasonal basis, which are implemented on both the demand and supply sides [13,14]. In terms of energy consumers, demand-side management takes the lead, utilizing automation equipped with mechanisms and controllers implemented in smart grid networks [15,16]. There are also known solutions that reduce energy waste while simultaneously increasing its efficiency, such as waste energy recovery [17].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen as a Renewable Energy Carrier in a Hybrid Configuration of Distributed Energy Systems: Bibliometric Mapping of Current Knowledge and Strategies

2023

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Storing energy in hydrogen deposits balances the operation of energy systems and is an effective tool in the process of energy transformation towards achieving Sustainable Development Goals. To assess the validity of its use as an alternative renewable energy carrier in dispersed energy systems of hybrid configuration, a comprehensive review of scientific literature was conducted in this study, based on bibliometric analysis. The bibliographic database used in the study was the international Web of Science database. This review contributes to a better understanding of the characteristics of the selected research area. The evolution of research trends implemented in the design of energy systems associated with hydrogen technologies is revealed, clearly indicating that it is a developing field. In recent years, there has been an increase in the number of publications, although the territorial range of research (mainly simulation) conducted in the domain does not include areas with the most favourable infrastructural conditions. The analysis reveals weak cooperation between South American, African, East Asian, and Oceanic countries. In the light of earlier, thematically similar literature reviews, several research gaps are also identified and proposals for future research are presented. They concern, in particular, the parallel implementation and optimization of the operation of hydrogen (HRES—Hybrid Renewable Energy System and HESS—Hybrid Energy Storage System) solutions in terms of economics, ecology, lifespan, and work efficiency, as well as their feasibility analysis. With the support of other researchers and those involved in the subject matter, this review may contribute to the further development of hybrid hydrogen systems in terms of increasing competitiveness and promoting the implementation of these technologies.

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Variant analysis of financial and energy efficiency of the heat recovery system and domestic hot water preparation for a single-family building: The case of Poland

Cited by 6 publications

References 22 publications

Evaluation of the Suitability of Using Artificial Neural Networks in Assessing the Effectiveness of Greywater Heat Exchangers

Evaluation of the Suitability of Using Artificial Neural Networks in Assessing the Effectiveness of Greywater Heat Exchangers

Binalarda Enerji Verimliliğinde Son Gelişmeler: Türkiye Örneği

Hydrogen as a Renewable Energy Carrier in a Hybrid Configuration of Distributed Energy Systems: Bibliometric Mapping of Current Knowledge and Strategies

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