Design, experimental investigation and multi-objective optimization of a small-scale radial compressor for heat pump applications

Schiffmann, Jürg; Favrat, Daniel

doi:10.1016/j.energy.2009.10.010

Cited by 88 publications

(68 citation statements)

References 25 publications

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“…Because of its lower COP, MILP algorithm designs a smaller capacity for PAC 1 (compared to the case with 2 HP's) which reduces the overall electricity consumption. In 2 HP's solution, the delivery temperature level for PAC1 is quite different from Becker's study [2], in which HP1 is an existing chiller, so it can be modified. However, its low COP is compensated by a higher heat load transfer and a large decrease of MER.…”

Section: Resultsmentioning

confidence: 99%

“…It is important to notice the main difference between this study and the reference case study [2].In the latter, HP's are consistent models picked up among a set of 16 distinct existing HP's (4 different refrigerants combined with 4 different compressors technologies) whereas in this paper, several hundred of HP's implementation are evaluated, but they are simplified models. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The algorithm was tested on a dairy case described in the literature [2] which includes many singularities: with PPP over and below the MPP and multiple phase transitions. Simulations are run for 2 and 3 HP's.…”

Section: Case Studymentioning

confidence: 99%

“…In industry, as thermal needs and process temperature ranges are more diversified, the number of possibilities is soaring. Becker [2] and Murr [3] also used a multi-objective optimizer to calculate the best temperature levels of refrigerant. Based on Energy Integration, the latter adapts existing heat pumps models to the process thermal needs by using Grand Composite Curve (GCC).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An Exergy-based MILP algorithm for Heat Pumps Integration in industrial processes

Thibault¹,

Zoughaib²,

Jumel³

2014

Int. J. Thermo

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Industrial heat pumps are efficient thermodynamic systems able to recover low grade heat and deliver it at higher temperatures (up to 120°C for the current available solutions). They are identified as a very efficient way to reduce primary energy consumption in processes, especially in food & drink or pulp & paper industries. Nevertheless, the optimal integration of multiple heat pumps in a large process with numerous heat fluxes is challenging. The present paper aims at describing an algorithm that was developed for this purpose, based on the GCC (Grand Composite Curve) of Pinch Analysis and on Exergy Theory. The temperature scale of the GCC is divided in areas defined by the Main Pinch Point and Potential local Pinch Points. Then, every potential heat pump is evaluated, absorbing heat in any area for delivering in an upper one. The corresponding heat load and COP are calculated. Exergy cost of remaining cold utilities is calculated with a Carnot based-efficiency, exergy cost of hot utilities according to their nature and temperature. The global exergy cost is used as criteria. Thanks to its formulation, the algorithm may suggest heat pumps solutions in non-obvious areas. The algorithm is tested on a literature case and shows equivalent or better exergy costs in a satisfying calculation time

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Exergy-based MILP algorithm for Heat Pumps Integration in industrial processes

Thibault¹,

Zoughaib²,

Jumel³

2014

Int. J. Thermo

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“…Çark boyutunun küçülmesiyle birlikte yataklama elemanlarının küçük kanat ucu açıklığı değerlerini sağlaması zorlaşmaktadır. Bu durum imalat toleranslarının ve kullanılan yataklama teknolojisinin bir sonucudur [10]. Bunun yanı sıra kanatların göbeğe bağlandığı noktada bulunan dolgunun yarıçapının kanat boyuna oranı da artmaktadır.…”

Section: Introductionunclassified

Bi̇r Mi̇kro Turbojet Motorun Ters Mühendi̇sli̇k İle İncelenmesi̇

Içke¹,

Tunçer²

2016

deufmd

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ÖZTersine mühendislik bir aygıt, nesne veya sistemin teknolojik çalışma prensiplerini keşfetme sürecidir. Bu çalışma, özellikle bir mikro turbojet motorun ters mühendisliği üzerine odaklanmaktadır. İlk olarak, gaz türbin motorunun bileşenleri üç eksenli bir optik tarayıcı kullanılarak taranmış ve dijital nokta bulutu formatına dönüştürülmüştür. Sonra, motor parçalarının katı modeli bilgisayar destekli çizim (CAD) ortamında bu verilerden tekrar inşa edilmiştir. Daha sonra, her bir bileşenin performans haritası ya hesaplanmış, yahut davranışlarına uygun olarak belirli varsayımlar yapılmıştır. Tasarım noktası ve tasarım noktası haricindeki motor performansı, parametrik çevrim analizi ile hesaplanmıştır. Ters mühendislik ile elde edilen sonuçlar üretici tarafından bildirilen motor performans parametreleri ile uyumludur. Dolayısıyla bu çalışma, tasarımın sıfırdan başlanarak yapılmasının pratik olmadığı zamanlarda ters mühendislik prosedürünün kullanımını göstermektedir. Bu yaklaşım, yeni bir tasarım için toplam tasarım döngüsü süresini azaltabilir.

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Design and Optimization of an Innovative Solid Oxide Fuel Cell–Gas Turbine Hybrid Cycle for Small Scale Distributed Generation

2014

Self Cite

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Distributed power generation and cogeneration is an attractive way toward a more rational conversion of fuel and biofuel. The fuel cell‐gas turbine hybrid cycles are emerging as the most promising candidates to achieve distributed generation with comparable or higher efficiency than large‐scale power plants. The present contribution is devoted to the design and optimization of an innovative solid oxide fuel cell–gas turbine hybrid cycle for distributed generation at small power scale, typical of residential building applications. A 5 kW planar SOFC module, operating at atmospheric pressure, is integrated with a micro gas turbine unit, including two radial turbines and one radial compressor, based on an inverted Brayton cycle. A thermodynamic optimization approach, coupled with system energy integration, is applied to evaluate several design options. The optimization results indicate the existence of optimal designs achieving exergy efficiency higher than 65%. Sensitivity analyses on the more influential parameters are carried out. The heat exchanger network design is performed for an optimal configuration and a complete system layout is proposed. An example of hybrid system integration in a common residential building is discussed.

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Design, experimental investigation and multi-objective optimization of a small-scale radial compressor for heat pump applications

Cited by 88 publications

References 25 publications

An Exergy-based MILP algorithm for Heat Pumps Integration in industrial processes

An Exergy-based MILP algorithm for Heat Pumps Integration in industrial processes

Bi̇r Mi̇kro Turbojet Motorun Ters Mühendi̇sli̇k İle İncelenmesi̇

Design and Optimization of an Innovative Solid Oxide Fuel Cell–Gas Turbine Hybrid Cycle for Small Scale Distributed Generation

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