An investigation on energy savings of a split air-conditioning using different commercial cooling pad thicknesses and climatic conditions

Harby, K.; Al-Amri, Fahad

doi:10.1016/j.energy.2019.06.031

Cited by 43 publications

(14 citation statements)

References 26 publications

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“…Xu et al [3] developed an evaporative cooling setup with corrugated cellulose pads to provide thermal comfort for greenhouses in a humid subtropical climate. Evaporative coolers made of cellulose pads were combined with air conditioners and tested by Harby and Al-Amri [4] and Dhamneya et al [5] to study their performance in achieving energy savings of a split air conditioner and window air conditioner, respectively. Aspen cooling pads were preferred in some air coolers due to their lower cost and effectiveness.…”

Section: Residential Buildingsmentioning

confidence: 99%

Experimental Investigation of a Direct Evaporative Cooling System for Year-Round Thermal Management with Solar-Assisted Dryer

Abaranji¹,

Panchabikesan

Velraj

2020

International Journal of Photoenergy

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Building cooling is achieved by the extensive use of air conditioners. These mechanically driven devices provide thermal comfort by deteriorating the environment with increased energy consumption. To alleviate environmental degradation, the need for energy-efficient and eco-friendly systems for building cooling becomes essential. Evaporative cooling, a typical passive cooling technique, could meet the energy demand and global climatic issues. In conventional direct evaporative cooling, the sensible cooling of air is achieved by continuous water circulation over the cooling pad. Despite its simple operation, the problem of the pad material and water stagnation in the sump limits its usage. Moreover, the continuous pump operation increases the electrical energy consumption. In the present work, a porous material is used as the water storage medium eliminating the pump and sump. An experimental investigation is performed on the developed setup, and experiments are conducted for three different RH conditions (low, medium, and high) to assess the porous material’s ability as a cooling medium. Cooling capacity, effectiveness, and water evaporation rate are determined to evaluate the direct evaporative cooling system’s performance. The material that replaces the pump and sump is vermicompost due to its excellent water retention characteristics. There is no necessity to change material each time. However, the vermicompost is regenerated at the end of the experiment using a solar dryer. The passing of hot air over the vermicompost also avoids mould spores’ transmission, if any, present through the air. The results show that vermicompost produces an average temperature drop of 9.5°C during low RH conditions. Besides, vermicompost helps with the energy savings of 21.7% by eliminating the pump. Hence, vermicompost could be an alternate energy-efficient material to replace the pad-pump-sump of the conventional evaporative cooling system. Further, if this direct evaporative cooling system is integrated with solar-assisted drying of vermicompost, it is possible to provide a clean and sustainable indoor environment. This system could pave the way for year-round thermal management of building cooling applications with environmental safety.

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Section: Residential Buildingsmentioning

confidence: 99%

Experimental Investigation of a Direct Evaporative Cooling System for Year-Round Thermal Management with Solar-Assisted Dryer

Abaranji¹,

Panchabikesan

Velraj

2020

International Journal of Photoenergy

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“…Different cooling pads were evaluated regarding cooling efficiency, such as jute, luffa fibers, and palm fibers [16]; coarse and fine polyvinyl carbonate [17]; rice straw and palm leaf fibers [18]; and CELdek ® , straw, and slice wood [19]. Additionally, several researchers have discussed the main factors when testing a cooling pad, such as surface area, thickness, and type and size of its perforations [20][21][22]. Some researchers also further discussed the decrease in electricity consumption by natural draught without the use of a blower [23].…”

Section: Figurementioning

confidence: 99%

Adaption of an Evaporative Desert Cooler into a Liquid Desiccant Air Conditioner: Experimental and Numerical Analysis

2019

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Desert coolers have attracted much attention as an alternative to mechanical air conditioning systems, as they are proving to be of lower initial cost and significantly lower operating cost. However, the uncontrolled increase in the moisture content of the supply air is still a great issue for indoor air quality and human thermal comfort concerns. This paper represents an experimental and numerical investigation of a modified desert air cooler into a liquid desiccant air conditioner (LDAC). An experimental setup was established to explore the supply air properties for an adapted commercial desert cooler. Several experiments were performed for air-water and air-desiccant as flow media, at several solutions to air mass ratios. Furthermore, the experimental results were compared with the result of a numerical simplified effectiveness model. The outcomes indicate a sharp reduction in the air humidity ratio by applying the desiccant solutions up to 5.57 g/kg and up to 4.15 g/kg, corresponding to dew point temperatures of 9.5 • C and 12.4 • C for LiCl and CaCl 2 , respectively. Additionally, the experimental and the numerical results concurred having shown the same pattern, with a maximal deviation of about 18% within the experimental uncertainties.

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“…The design parameters of the outdoor air are important for determining the maximum capacity of air conditioning systems, as well as the volume in the building that will be occupied by the utilities and air ducts of these systems [1][2][3][4][5][6]. In addition, the design parameters significantly affect the economic characteristics of the building, both during its construction and operation [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Impact of design parameters of outdoor air on the energy performance of air conditioning systems

Malyavina

Malikova

2021

E3S Web Conf.

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The temperature and the enthalpy of the outdoor air are the main parameters of the outdoor environment, the design values of which must be assigned with a sufficient accuracy. Therefore, normalization of the design enthalpy using maps is unacceptable. The design outdoor air parameters for the warm period of the year for air conditioning in different countries are determined from the average multiyear data. However, most countries have adopted much shorter periods of exceeding the actual values of the outdoor air temperature and enthalpy than in Russia. In addition, the coasts of the most developed countries are washed by the waters of the seas and the oceans, which stabilize the weather in these countries, as a result of which the spread of parameter values from year to year in these countries is much less than in Russia having a continental climate. It is proposed to take into account the long-term excess of the calculated parameters in individual years when choosing the design temperature and enthalpy of the outdoor air for the warm period in Russia. The estimated increase in the calculated enthalpy by 4-5 kJ / kg showed that a significant increase in the size of air conditioning units will not be required.

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An investigation on energy savings of a split air-conditioning using different commercial cooling pad thicknesses and climatic conditions

Cited by 43 publications

References 26 publications

Experimental Investigation of a Direct Evaporative Cooling System for Year-Round Thermal Management with Solar-Assisted Dryer

Experimental Investigation of a Direct Evaporative Cooling System for Year-Round Thermal Management with Solar-Assisted Dryer

Adaption of an Evaporative Desert Cooler into a Liquid Desiccant Air Conditioner: Experimental and Numerical Analysis

Impact of design parameters of outdoor air on the energy performance of air conditioning systems

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