Air cycle combined heating and cooling for the food industry

Foster, A; Brown, Tim; Gigiel, A; Alford, Adrian; Evans, Judith

doi:10.1016/j.ijrefrig.2011.03.016

Cited by 28 publications

(7 citation statements)

References 4 publications

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“…Elsayed S S researched the simulation and analysis of open air cycle refrigeration system under fixed and variable axial speed. Analysis results show that the cooling temperature of the system is decreased with the decrease of the cooling capacity under the condition of fixed axial velocity and the system can run under any refrigeration temperature when axial velocity is variable [6,7].…”

Section: Research Progress In Foreign Countriesmentioning

confidence: 99%

Research Progress of Air Cycle Refrigeration Technology

Xue¹,

Feng-lan²,

Li³

2016

Proceedings of The6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016)

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Abstract:In response to the global call of environmental protection, a kind of environment-friendly air circulation refrigeration system is analyzed . Working principle of air cycle refrigeration system is introduced.The advantages of air refrigeration system are summarized, and main research achievements and progress in related fields at home and abroad are briefly narrated. The application in the field of the research of air cycle refrigeration are introduced as a clean and environment-friendly refrigeration way, in addition, the future development direction and the prospect of air cycle refrigeration technology are also predicted. Air cycle refrigeration technology will take up an important position in the future air conditioning field according the analysis.

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Section: Research Progress In Foreign Countriesmentioning

confidence: 99%

Research Progress of Air Cycle Refrigeration Technology

Xue¹,

Feng-lan²,

Li³

2016

Proceedings of The6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016)

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“…Air cycle heating and cooling has many advantages, including high reliability, ease of maintenance, flexibility of temperature, and heating and cooling capacities. In addition, it employs a natural refrigerant, which is environmentally benign [26][27][28][29]. The air cycle approach is one of the most promising long-term alternatives for refrigeration machines, air conditioners, and heat pumps [26].…”

Section: Trigeneration Micro-caes Systemmentioning

confidence: 99%

“…In the case of conventional refrigeration and air conditioning, the air cycle approach suffers from low energy efficiency and so is not competitive with vapor compression cycles [27]. But, air cycles have been studied for HVAC in office buildings within the framework of European research projects, since they have advantages in applications that require both heating and cooling [26,29] and because of the potential of highly efficient turbo machinery that is used [27,28].…”

Section: Trigeneration Micro-caes Systemmentioning

confidence: 99%

Potential and Evolution of Compressed Air Energy Storage: Energy and Exergy Analyses

Kim

Lee

Kim

et al. 2012

Entropy

145

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Abstract:Energy storage systems are increasingly gaining importance with regard to their role in achieving load levelling, especially for matching intermittent sources of renewable energy with customer demand, as well as for storing excess nuclear or thermal power during the daily cycle. Compressed air energy storage (CAES), with its high reliability, economic feasibility, and low environmental impact, is a promising method for large-scale energy storage. Although there are only two large-scale CAES plants in existence, recently, a number of CAES projects have been initiated around the world, and some innovative concepts of CAES have been proposed. Existing CAES plants have some disadvantages such as energy loss due to dissipation of heat of compression, use of fossil fuels, and dependence on geological formations. This paper reviews the main drawbacks of the existing CAES systems and presents some innovative concepts of CAES, such as adiabatic CAES, isothermal CAES, micro-CAES combined with air-cycle heating and cooling, and constant-pressure CAES combined with pumped hydro storage that can address such problems and widen the scope of CAES applications, by energy and exergy analyses. These analyses greatly help us to understand the characteristics of each CAES system and compare different CAES systems. OPEN ACCESS

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“…Alternatively, cascade refrigeration systems (Dopazo and Fernández-Seara, 2012), which use two different refrigeration circuits interconnected with a heat exchanger, can be adopted to reach low evaporator temperatures. Their installation and maintenance is, thus, more complex (Foster et al, 2011) than the one required for a single stage chiller. For these reasons, producing air significantly colder than -30 °C by using vapour compression chillers is complex and expensive.…”

Section: Introductionmentioning

confidence: 99%

“…The compressed liquid nitrogen is injected through nozzles in batch or tunnel freezers (Awonorin, 1997;Shaikh and Prabhu, 2007;Gazda, 2013) where it rapidly evaporates at ambient pressure, absorbing a large amount of heat from the food. These systems are operated with an open cycle as the refrigerant cannot be recovered at the end of the freezing process (Foster et al, 2011). Therefore, liquid nitrogen systems are characterised by high running costs due to the onerous supplying chain of the refrigerant.…”

Section: Introductionmentioning

confidence: 99%

Reversed Brayton cycle for food freezing at very low temperatures: Energy performance and optimisation

Biglia

Comba

Fabrizio

et al. 2017

International Journal of Refrigeration

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Freezing is a valuable method to increase food shelf life and to ensure high quality standards during longterm storage. Additional benefits to frozen food quality can be achieved by freezing at very low temperatures (« -50 °C): small ice crystals formation during fast freezing reduces food cell wall rupture, preventing water and texture loss during thawing. This paper presents the design of an innovative food freezing system operating at very low temperatures, based on a modified reversed Brayton cycle (rB cycle). The plant is composed of two interconnected subsystems: a primary thermodynamic closed loop, operated by an rB cycle, and a secondary airflow loop which is devoted to food freezing by batch process. Relevant features of the designed rB cycle rely on the adopted environmentally safe working fluid, the optimised thermodynamics working conditions and the innovative cycle layout. A modelling framework for the system was developed to identify and design efficient operative settings for the plant components (turbo-machineries, heat exchangers, etc.) and to assess, via sensitivity analysis, the influence of the main design parameters on the global energy performance. The proposed system configuration, designed to maximise the Coefficient of Performance (CoP) value of the plant, was determined by means of nonlinear multivariable optimisation. In addition, the energy performance of the system can be increased by recovering waste heat available from the rB cycle.

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Air cycle combined heating and cooling for the food industry

Cited by 28 publications

References 4 publications

Research Progress of Air Cycle Refrigeration Technology

Research Progress of Air Cycle Refrigeration Technology

Potential and Evolution of Compressed Air Energy Storage: Energy and Exergy Analyses

Reversed Brayton cycle for food freezing at very low temperatures: Energy performance and optimisation

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