Comparison of compressor control strategies for energy efficient refrigerated counters

Jensen, Jonas Kjær; Kærn, Martin Ryhl; Pedersen, Per Henrik; Markussen, Wiebke Brix

doi:10.1016/j.ijrefrig.2021.02.008

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…Studies on energy performance in the commercial refrigerator sector are very limited. Jensen and his work group evaluated energy efficiency in the horizontal-type commercial refrigerator in line with compressor control strategies [24].…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly Design of a Commercial Refrigerator for Energy Efficiency Label

Hacı,

Kahraman,

Taşkıran

et al. 2023

Materials, Methods & Technologies

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Adopting hydrocarbon-based refrigerants (R290) and environmentally friendly designs can significantly positively impact energy consumption reduction and sustainability within the food service sector. In commercial kitchens, energy-intensive appliances like refrigerators, ovens, and dishwashers are prevalent, consuming more energy than their household counterparts. These products come in various models and sizes based on enterprise needs. Energy efficiency labels are mandatory for many household products, such as white goods (e.g., refrigerators, washing machines) and electronic devices (e.g., screens), reflecting their energy performance. However, the energy efficiency label is currently limited to commercial coolers (refrigerators and freezers) in the commercial kitchen realm, following EU regulations 2015/1094 and 2015/1095. Ozti manufactures cooler products of diverse models and capacities, emphasizing the importance of energy consumption performance. The study evaluated the energy consumption performance of an innovative commercial refrigerator prototype. This evaluation included using M packages (Tylose test packages) during the test phase, adhering to the EN16825 standard. Apart from eco-friendly design considerations, the appropriate selection and placement of equipment like compressors and evaporators played a crucial role. As a result of employing hydrocarbon-containing refrigerant gas, the commercial refrigerator prototype demonstrated an impressive reduction of approximately 30% in energy consumption.

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Section: Introductionmentioning

confidence: 99%

Ecofriendly Design of a Commercial Refrigerator for Energy Efficiency Label

Hacı,

Kahraman,

Taşkıran

et al. 2023

Materials, Methods & Technologies

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“…Rotary screw air compressors (RSAC) have two meshed rotors that force the air to move into progressively smaller volumes, thus increasing the pressure. Variable-speed drives (VSD) are used in most cases for better energy efficiency [1]. However, the speedtorque curves for RSACs are very flat across the full speed range.…”

Section: Introductionmentioning

confidence: 99%

Predictive Control of Multi-Phase Motor for Constant Torque Applications

et al. 2022

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Constant torque motors are needed for rotary screw compressors that are used for cooling and other applications. In such systems, the torque demanded by the load is approximately the same over the whole range of mechanical speeds. In this paper, the use of multi-phase induction machines is investigated for this type of application. The requirement of low stator current distortion is considered. A scheduled approach is used to provide the best possible tuning for each operating point, similar to the concept of gain scheduling control. Simulations and laboratory tests are used to assess the proposal and compare it with finite-state predictive control. The experiments show that a trade-off situation appears between the ripple content in stator currents in the torque-producing and harmonic planes. As a consequence, the controller tuning appears as an important step. The proposed method considers various figures of merit with cost function tuning, resulting in a scheduled scheme that provides improved results. It is shown that the approach leads to a reduction in current ripple, which is advantageous for this particular application.

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Experimental analysis of ON/OFF and variable speed drive controlled industrial chiller towards energy efficient operation

Olszewski

2022

Applied Energy

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Comparison of compressor control strategies for energy efficient refrigerated counters

Cited by 4 publications

References 9 publications

Ecofriendly Design of a Commercial Refrigerator for Energy Efficiency Label

Ecofriendly Design of a Commercial Refrigerator for Energy Efficiency Label

Predictive Control of Multi-Phase Motor for Constant Torque Applications

Experimental analysis of ON/OFF and variable speed drive controlled industrial chiller towards energy efficient operation

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