Impact of the electric compressor for automotive air conditioning system on fuel consumption and performance analysis

Ahmad, Zair Asrar; Dahlan, Afiq Aiman; Zulkifli, Amirah Haziqah; Nasution, Henry; Aziz, Azhar Abdul; Perang, Mohd Rozi Mohd; Jamil, Hishammudin Mohd; Misseri, Mohd Nazri

doi:10.1088/1757-899x/100/1/012028

Cited by 9 publications

(6 citation statements)

References 8 publications

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“…Zulkifli et al (Zulkifli et al, 2015) have carried out an experimental investigation on the performance of an HVAC system retrofitted with an electric A/C compressor. The vehicle under test was a small hatchback with a 1.3 l petrol engine.…”

Section: Mechanical Vs Electrical A/c Compressormentioning

confidence: 99%

Sensitivity analysis and calibration of vehicle HVAC

Ahmedov

Watson

Ebrahimi

et al. 2022

IJPT

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Due to the non-uniformity of material properties and the complexity of the airflow regimes within automotive passenger compartments, modelling their thermal dynamics is a challenging task that requires the application of hardware demanding computational tools and methods -FEA & CFD. Evaluation of the average thermal conditions of a cabin compartment can be achieved by using simpler, computationally friendly methods like the 1D CFD simulation technique. A two-zone GT-Suite cabin compartment model capable of predicting the average thermal conditions during various drive cycles has been created. The cabin model is based on a conventional SUV. A sensitivity analysis was carried out to identify the parameters with a significant impact on the cabin thermal response. The cabin model has been calibrated and validated with thermal performance test data. The validated cabin model and a 1D CFD refrigeration circuit model, have been integrated into the baseline HVAC system model. The baseline HVAC system performance has been validated against climate chamber physical test data. A theoretical performance comparison between the baseline HVAC system and an electrified HeVAC system have been carried out. The key difference between the systems is that the HVAC system uses a conventional mechanically driven swashplate compressor and the HeVAC system uses a high-efficiency electric scroll compressor. The CoP and the cabin thermal response have been evaluated for both systems. The 1D CFD model can be implemented in complex vehicle models running on multiple software domains via co-simulation.

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Section: Mechanical Vs Electrical A/c Compressormentioning

confidence: 99%

Sensitivity analysis and calibration of vehicle HVAC

Ahmedov

Watson

Ebrahimi

et al. 2022

IJPT

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“…an electromagnet) is energised, it draws the pressure plate towards it, locking the rotor pullet and pressurising plate together. This causes the compressor to run, creating pressure and circulating the refrigerant [22,23]. During the running of the compressor, the sound of operation from the compressor is heard, which is also one of the highest contributors to the noise of the HVAC system.…”

Section: Experimental Setup Of Model and Vehicle Hvac Systemsmentioning

confidence: 99%

Validation of Clicking-type Noise and Vibration in Automotive HVAC System

Satar

Mazlan

Hamdan

et al. 2021

IJAME

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In this study, the characteristics of clicking-type noise and vibration occurring in the automotive heating, ventilation and air conditional (HVAC) systems are investigated. A lab-scale model of HVAC system is developed, and validation is carried out with a vehicle system. A fixed blower speed of 1 (at an airflow of 2.53 m/s) with alternated air conditional (AC) was implied in this study. Three different sensors namely as tachometer, accelerometer, and microphone were used to measure and prove the existing noise in the HVAC system. The study inferred that the compressor contributed significantly to the total vibration and noise in the HVAC system. Other components such as AC pipe, evaporator, and thermal expansion valve (TXV) also contributed to a slight extent. The clicking noise was observed in the operating frequency range of 200 ~ 300 Hz. This noise and vibration issues are partly influenced by the running conditions of the AC and the effect was significant when the AC was turned on. The validation of the findings in the model shows a good agreement with the results obtained in the vehicle system, whereby the clicking noise and vibration can be observed at a similar frequency range.

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“…The average measured power supplied by the alternator was around 500 W. Additionally, if mechanically-driven auxiliaries such as AC compressors, water and oil pumps were also substituted by electric driven ones and all auxiliaries then powered by energy recovery systems such as TEGs and regenerative braking, then the fuel savings could be even greater. Some references can be found relating typical net power, consumption and/or efficiency of these auxiliaries [24][25][26][27][28]. It already highlights the advantages of using electrically-driven auxiliaries given their typically higher efficiency and flexibility of operation.…”

Section: Energy Savingsmentioning

confidence: 99%

Efficiency improvement of vehicles using temperature controlled exhaust thermoelectric generators

Brito

Pacheco

Vieira

et al. 2020

Energy Conversion and Management

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One of the main obstacles for the use of thermoelectric generators (TEGs) in vehicles is the highly variable thermal loads typical of driving cycles. Under these conditions it will be virtually impossible for a conventional heat exchanger to avoid both thermal dilution under low thermal loads and TEG overheating under high thermal loads. The authors have been exploring an original heat exchanger concept able to address the aforementioned problems. It uses a variable conductance thermosiphon-based phase-change buffer between the heat source and the TEGs so that a nearly constant, optimized temperature is obtained regardless of operating conditions. To the best of the authors' knowledge, the thermal control feature of the system is unique among existing TEG concepts. The novelty of the present work is the actual computation of operating pressure and temperature and the corresponding vaporization and condensation rates inside the thermosiphon system during driving cycles along with the assessment of the influence of the volumes and pre-charge pressure on electrical output. The global energy and emission savings were also computed for a typical yearly driving profile. It was observed that indeed the concept has unparalleled potential for improving the efficiency of vehicles using TEGs, with around 6% fuel and CO2 emissions savings using the system. This seems a breakthrough for such light duty applications since the efficiency of conventional (passive) systems is strongly deprecated by thermal dilution under low thermal loads and the need to bypass high thermal load events to avoid overheating. On the contrary, the present concept allows the control of the hot face temperature of the TEGs even under highly variable thermal load (i.e. driving cycle) environments.

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Impact of the electric compressor for automotive air conditioning system on fuel consumption and performance analysis

Cited by 9 publications

References 8 publications

Sensitivity analysis and calibration of vehicle HVAC

Sensitivity analysis and calibration of vehicle HVAC

Validation of Clicking-type Noise and Vibration in Automotive HVAC System

Efficiency improvement of vehicles using temperature controlled exhaust thermoelectric generators

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