Air Conditioning System Design using Free Cooling Technology and Running Mode of a Data Center in Jinan

Yang, Yong; Wang, Bo; Zhou, Qinbin

doi:10.1016/j.proeng.2017.09.924

Cited by 14 publications

(7 citation statements)

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“…This centralized cooling system will use the Air Handling Unit (AHU) as a medium that circulates cold airflow from the centralized system. The operational strategy of this thermal system is proven to save more on cooling costs compared to conventional cooling systems in each room (Yang et al, 2017). Research conducted by Budaiwi & Abdou (2013) concluded that a significant reduction in energy consumption at the mosque could be obtained by maintaining thermal comfort when the air-conditioning system is operated and designed by insulation having a 23% reduction in cooling energy consumption and at the mosque without insulation 36%.…”

Section: Introductionmentioning

confidence: 99%

Design of Learning Media: Modeling & Simulation of Building Thermal Comfort Optimization System in Building Physics Course

Wati

Widiansyah

2020

JPII

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The use of instructional media is something that can support the teaching and learning process; therefore, a lecturer must have the ability to create and develop learning media. This study aims to improve student learning outcomes in building physics course by using simulation learning media and models to help students understand thermal comfort material. Making modelling and simulation media is done using MATLAB software. The subjects of this study were physics engineering students who took Building Physics course. At the beginning of the study, students are given material and then in groups discuss thermal contents and then given a pretest test with an average score of 70.27, and for an average grade of 71.3 assignments. At the meeting next week, using the Student-Centered Learning (SCL) method and using problem-based learning in groups, students take temperature measurements in several rooms in the Building at the UNAS Physical Engineering Laboratory. The measurement results show that the room does not have thermal requirements (PERGUB No. 38/2012), so students have the task of conducting experiments using models that have been created by researchers to create learning media to improve comfort in using thermal buildings. Simulation results carried out by students, that is, can produce rooms with thermal conditions at 21-25°C (PERGUB No. 38/2012). This simulation is also able to provide the score of building energy efficiency. After students succeed in conducting the test, the assessment test or posttest is carried out with an average score obtained 80.55, and an average score of 80 assignments. The results of the pretest, assignment 1, assignment 2, and posttest show an increase in students’ scores of 14.6% for the Test and Task Score of 12.20%. Based on the hypothesis test, for both variables showed t-count < t-table and significance < 0.05. It shows there are significant differences in student learning outcomes both test scores and assignment scores before and after using a simulated media. Thus, the system and simulation model designed can be used as learning media that can improve student learning outcomes.

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Section: Introductionmentioning

confidence: 99%

Design of Learning Media: Modeling & Simulation of Building Thermal Comfort Optimization System in Building Physics Course

Wati

Widiansyah

2020

JPII

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“…For energy conservation of ACS, there are four main considerations: (1) appropriate cooling strategy [15]; (2) good layout design and air flow distribution for computer rooms [16,17]; (3) economizer cycles [18,19]; and (4) simulation-based control [20]. In addition to these, the use of heat pipes [5,[21][22][23] and free-cooling [24][25][26] in data centers was also attempted. All of the above-mentioned methods involved the optimization of the method or improvement of a specific technology in existing energy systems; however, they did not address configuration optimization in the system planning and design.…”

Section: Literature Reviewmentioning

confidence: 99%

Configuration Optimization Model for Data-Center-Park-Integrated Energy Systems under Economic, Reliability, and Environmental Considerations

Liu

et al. 2020

Energies

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The analysis of energy configuration in the planning of data-center-park-integrated energy systems (DCP-IESs) has become an enormous challenge, owing to multi-energy complementarity, energy cascade use, and energy security. In this study, a configuration model of DCP-IESs was established to obtain the economic and low-carbon energy uses of the data centers, based on mixed integer linear programming. In the model, carbon emissions were converted to economic indicators through carbon pricing. Then, the configuration model was modified according to the security of the proposed device switching logic, and the Markov-based reliability estimation method was used to ensure the redundant design of the configuration. Using the new energy configuration method, the DCP-IES configuration scheme could be obtained under economical, low-carbon, and high reliability conditions. A data center park in Shanghai was selected as a case study, and the results are as follows: it will only take 2.88 years for the economics of DCP-IES to reach those of traditional data center energy systems. Additionally, the use of configuration model in DCP-IES would result in a reduction in annual carbon emissions of 39,323 tons, with a power usage effectiveness of 1.388, whereas an increase in reliability results in an increasingly faster increase in the initial investment cost.

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“…The efficiency of chillers and cooling systems on the whole can be enhanced by an intensification of heat transfer in evaporators and condensers [31,32] by the application of advanced circulation contours [33,34] using the cooling potential of evaporated water [35,36], exhaust heat potential [37,38], and alternative fuels [39,40]. They enable deep exhaust heat utilization [41,42] with low temperature condensation [43,44].…”

Section: Introductionmentioning

confidence: 99%

Energy Saving in Trigeneration Plant for Food Industries

Radchenko

Mikielewicz

et al. 2022

Energies

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The trigeneration plants for combined cooling, heating, and electricity supply, or integrated energy systems (IES), are mostly based on gas reciprocating engines. The fuel efficiency of gas reciprocating engines depends essentially on air intake temperatures. The transformation of the heat removed from the combustion engines into refrigeration is generally conducted by absorption lithium-bromide chillers (ACh). The peculiarity of refrigeration generation in food technologies is the use of chilled water of about 12 °C instead of 7 °C as the most typical for ACh. This leads to a considerable cooling potential not realized by ACh that could be used for cooling the engine intake air. A refrigerant ejector chiller (ECh) is the simplest in design, cheap, and can be applied as the low-temperature stage of a two-stage absorption-ejector chiller (AECh) to provide engine intake air cooling and increase engine fuel efficiency as result. The monitoring data on gas engine fuel consumption and power were analyzed in order to evaluate the effect of gas engine cyclic air cooling.

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Air Conditioning System Design using Free Cooling Technology and Running Mode of a Data Center in Jinan

Cited by 14 publications

References 0 publications

Design of Learning Media: Modeling & Simulation of Building Thermal Comfort Optimization System in Building Physics Course

Design of Learning Media: Modeling & Simulation of Building Thermal Comfort Optimization System in Building Physics Course

Configuration Optimization Model for Data-Center-Park-Integrated Energy Systems under Economic, Reliability, and Environmental Considerations

Energy Saving in Trigeneration Plant for Food Industries

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