An experimental investigation of energy saving potentials for room type variable-speed air conditioners in public offices: A case study from Istanbul

Yurtseven, M. Berker; Erkin, Emre; Acuner, Ebru; Mete, Seher; Onaygıl, Sermin

doi:10.1016/j.enbuild.2013.09.020

Cited by 19 publications

(5 citation statements)

References 4 publications

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“…The analysis advised that Bahrain utilize a DC inverter air conditioning system because it is the most cost-effective option. M. Berker Yurtseven [19] performed a field test to compare the energy consumption of constant speed air conditioners (non-inverter AC) and variable speed air conditioners (inverter AC) in two similar public office rooms in terms of user comfort conditions. Hanlong Wan [20] examined VRF system architecture, modelling, experimentation, control approaches, fault detection, diagnostics, and defrost.…”

Section: Introductionmentioning

confidence: 99%

The impact of the wall insulation material and variable refrigerant flow system on building energy consumption and cost

Shaikh

Memon

Qureshi

et al. 2023

JMES

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The use of VRF system and insulation in building envelope are both considered as promising option to reduce energy consumption of a building. This study analysis energy saving potential of VRF system and building insulation using modelling and simulation of a typical office building. The model office building is simulated with the weather of Hyderabad, Sindh, Pakistan using EnergyPlus building simulation software. The simulation cases include conventional and VRF air conditioning systems with and without insulation to evaluate and compare the annual cooling and energy savings and payback period. Results showed that by replacing conventional air conditioner with VRF AC electrical power can be reduced by 42-45%. It is also noted that Cellulose, expanded polystyrene, extruded polystyrene and polyurethane insulations can save around 49.5, 51.4, 51.6, and 54.54% of electricity, respectively. In the case VRF air conditioner used with Cellulose, expanded polystyrene, extruded polystyrene and polyurethane insulation may reduce electricity consumption by 66.5, 67.4, 67.5 and 68.9 %, respectively. The payback period varies from 7 to 15 months. However, cellulose with VRF air conditioner has the least payback period of around 7 months. The longest payback period of around 15 months was noted for the un-insulated office building with VRF air conditioner. Despite having longer payback period, the combination of polyurethane insulation with VRF air conditioning system is the most efficient combination.

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Section: Introductionmentioning

confidence: 99%

The impact of the wall insulation material and variable refrigerant flow system on building energy consumption and cost

Shaikh

Memon

Qureshi

et al. 2023

JMES

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“…Both rooms were identical in terms of geometry and occupancy. The Inverter AC can save energy between 11 and 38 percent, which is considerably huge [10]. Elzanati and Ameen in the year 2013 analyzed the two systems namely solar AC and Inverter AC in the grid station of Bahrain to choose the most economical technology.…”

Section: Introductionmentioning

confidence: 99%

An Investigation to Reduce Electricity Bills using Inverter AC in Pakistan

Khan

2022

SSURJET

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The cost affiliated with energy consumption of a conventional air conditioner is so high, an average salaried person cannot afford it. 5.8 m x 4.5 m x 3.6 m room is used for the energy assessment, in which the Inverter/VRF and Conventional air conditioning systems are used separately to attain a set temperature of 25 OC for the weather in Hyderabad, Pakistan. Through the simulated results, May has the highest energy use, with 467 kWh for conventional air conditioning and 310 kWh for inverter air conditioning. When compared to conventional air conditioners, inverter or VRF air conditioners can save up to 50% on energy. In Pakistan, according to NEPRA pricing, inverter air conditioners can have a payback time of 5 to 11 months for various brands of air conditioners, and they can reduce an ordinary consumer's annual electricity cost by up to 48 percent.

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“…Many previous studies have reported anomalous conserves in electricity consumption compared with non-inverter air conditioners. Yurtseven et al [6] carried out a field test analysis of inverter and non-inverter air conditioners to compare the energy saving in public offices in Istanbul. They found that the energy saving of the inverter air conditioners varies between 11 and 38% compared to and non-inverter air conditioners over the whole testing period and they also noticed that the inverter air conditioners is more energy efficient in the climate condition with high fluctuation temperature over a day.…”

Section: Introductionmentioning

confidence: 99%

Comparison of energy consumption between non-inverter and inverter-type air conditioner in Saudi Arabia

et al. 2020

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Interest for air-conditioning systems (ACs) has exponentially expanded worldwide throughout the most recent couple of decades. Countries with booming economies including Saudi Arabia report high growth of sales of room air conditioners. With the expanded (GDP) and warming climates, interest for room air-conditioning systems is required to additionally increment. Meeting the expanded need for electricity energy will be a challenge. Expanded utilization of energy-efficient air conditioners impactsly affects lowering the electricity demand. In an ordinary AC, the blower runs at a fixed speed and is either ON or OFF. In an inverter AC, the compressor is consistently on; however, power drawn relies upon the demand for cooling. The speed of the compressor is adjusted appropriately. In this paper, the energy consumption of non-inverter and an inverter AC of the same capacity was assessed in an average office room, under comparative operating conditions, to find the differences in the energy saving, Carbon Dioxide (CO2) emission, and power consumption of air conditioner. Energy consumption was measured for about 108 days, which is from July 16th to October 31st, 24/7, and compared. The experiment is conducted with the same conditions and same capacity air conditioners (18,000 BTU). Results show that the day-by-day normal vitality utilization, the inverter will save up to 44% of electrical consumption compared to a non-inverter of 3471 kWh/year and 6230 kWh/year respectively. Furthermore, the Total Equivalent Warming Impact (TEWI) analysis shows that inverters can save 49% of CO2 emissions.

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An experimental investigation of energy saving potentials for room type variable-speed air conditioners in public offices: A case study from Istanbul

Cited by 19 publications

References 4 publications

The impact of the wall insulation material and variable refrigerant flow system on building energy consumption and cost

The impact of the wall insulation material and variable refrigerant flow system on building energy consumption and cost

An Investigation to Reduce Electricity Bills using Inverter AC in Pakistan

Comparison of energy consumption between non-inverter and inverter-type air conditioner in Saudi Arabia

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