Performance representation of variable-speed compressor for inverter air conditioners based on experimental data

Shao, Shuangquan; Shi, Wenxing; Li, Xianting; Huajun, Chen

doi:10.1016/j.ijrefrig.2004.02.008

Cited by 127 publications

(43 citation statements)

References 7 publications

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“…Moreover, according to Shuangquan Shao et al [19], it is one of the best options of regulation. A number of authors have conducted experimental studies on variable flow compressor efficiency, such us Tassou and Qureshi with reciprocating compressors in refrigeration facilities [20], or Aprea et al with scroll compressors [21].…”

Section: Copmentioning

confidence: 99%

Air conditioning in the region of Madrid, Spain: An approach to electricity consumption, economics and CO2 emissions

Izquierdo

Moreno-Rodríguez

González-Gil

et al. 2011

Energy

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a b s t r a c tAn understanding of electricity consumption due to residential air conditioning (AC) may improve production and environmental impact strategy design. This article reports on a study of peak and seasonal electricity consumption for residential air conditioning in the region of Madrid, Spain. Consumption was assessed by simulating the operation of AC units at the outdoor summer temperature characteristics of central Spain. AC unit performance when operating under part load conditions in keeping with weather conditions was also studied to find cooling demand and energy efficiency. Like wise final electricity consumption was computed and used to calculate energy costs and greenhouse gas emissions (GHGs). Cooling demand, when family holidays outside the region were factored into the calculations, came to 1.46 Â 10 9 kWh. Associated seasonal electricity demand was 617 Â 10 6 kWh and seasonal performance of AC units around 2.4. Electricity consumption in the whole region was observed to peak on 30 June 2008 at 5.44 Â 10 6 kW, being the load attributable to residential AC 1.79 Â 10 6 kW, resulting about 33% of the total peak consumption. The seasonal cost per household was about V156 and the total equivalent warming impact was 572 Â 10 3 t CO 2 . The method proposed can be adapted for use in other regions.

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Section: Copmentioning

confidence: 99%

Air conditioning in the region of Madrid, Spain: An approach to electricity consumption, economics and CO2 emissions

Izquierdo

Moreno-Rodríguez

González-Gil

et al. 2011

Energy

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“…For example, in Figure 3 the cooling capacity trend of a reciprocating compressor is reported in terms of evaporation temperature, for a condensation temperature of 30°C and for fixed frequencies (30 Hz, 40 Hz, 50 Hz and 60 Hz). Additionally, in Table 2, referring to the reciprocating compressor, it is possible to note that, for different condensation and evaporation temperatures, the ratios of refrigerant mass flow rate, 6 input power and cooling capacity values at any frequency with respect to the values at the basic frequency, remain constant. In Table 2 the environment temperature, the superheating and subcooling degrees of the refrigerant fluid are fixed too.…”

Section: Optimization Of the Compressor Exergy Economy Energy Aspectsmentioning

confidence: 99%

“…In Table 2 the environment temperature, the superheating and subcooling degrees of the refrigerant fluid are fixed too. In other words the above mentioned ratios are independent from condensation and evaporation temperatures and depend only on the compressor frequency, and hence can be expressed by means of the second order functions of the frequency [6]:…”

Section: Optimization Of the Compressor Exergy Economy Energy Aspectsmentioning

confidence: 99%

“…The first step is to get experimentally the compressor performance parameters in terms of refrigerant mass flow rate, input power and cooling capacity when the frequency varies. The second step is to get, for each type of compressor, curve fitted polynomials that allow the optimum frequency to be evaluated in terms of compressor data at the basic frequency [6], in order to come out with a control algorithm. This paper aims at optimizing the energy, exergy and economy aspects of variable speed reciprocating and scroll compressors.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the compressor optimal working conditions

Aprea¹,

Mastrullo²,

Renno³

2009

Applied Thermal Engineering

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The replacement of environmentally unfriendly refrigerants and the energy saving demand have recently caused changes of the components and operation of the vapour compression plants; in particular, the compressors have been experiencing upgrades and modifications. The compression systems are usually designed for working under maximum load conditions, but most of the time these plants work under partial load conditions with compressor on-off cycles regulated by a thermostat. As for the variable speed compressor, the speed is continuously controlled to match the compressor capacity to the load required; this allows to save energy when compared to the thermostatic control. The aim of this paper is to identify the compressor current frequency that optimizes the energy, exergy and economy aspects. The determination of the optimum frequency for each working condition is key to build a control algorithm that allows the compressor speed to be continuously regulated by an inverter. This ACCEPTED MANUSCRIPT 2 analysis has been applied to the reciprocating and scroll compressors and high energy savings have been achieved.

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“…For example, manufactures data of compressor performance including capacity, power input, and mass flow rate of refrigerant and current are presented as a function of the evaporation and condensation temperatures. Curve fitting techniques are used to fit the manufacturer data to the third-order 10-coefficient polynomials of two variables (ARI Standard 540, 1999;Arthur et al, 1997;Shao et al, 2004). Those coefficients have no physical meaning so that it is only valid inside the compressor envelope and the extrapolation of performance outside the envelope could lead to a wrong trend.…”

Section: Introductionmentioning

confidence: 99%

Loss-efficiency model of single and variable-speed compressors using neural networks

Liu¹,

Zhao²,

Zhang³

et al. 2009

International Journal of Refrigeration

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Performance representation of variable-speed compressor for inverter air conditioners based on experimental data

Cited by 127 publications

References 7 publications

Air conditioning in the region of Madrid, Spain: An approach to electricity consumption, economics and CO2 emissions

Air conditioning in the region of Madrid, Spain: An approach to electricity consumption, economics and CO2 emissions

Determination of the compressor optimal working conditions

Loss-efficiency model of single and variable-speed compressors using neural networks

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