scholarly journals Pengujian Arus pada Simulator Sistem Kelistrikan Air Conditioner (AC)

2020 ◽  
Vol 1 (2) ◽  
pp. 93-100
Author(s):  
Hamid Nasrullah ◽  
Slamet Ridho Illahi
Keyword(s):  
Experimental Method ◽  
Electrical Circuit ◽  
Air Conditioner ◽  
Electrical System ◽  
Magnetic Clutch ◽  
Fan Performance

Air Conditioner is part in a car to achieve safety and security in driving. The purpose of this study was to determine the current of the air conditioner electrical system, identify the electrical circuit and analyze the electrical circuit of the air conditioner system. This research used experimental method. The air conditioner system simulator show current and voltage generated at blower speed 1: current 15.1 A, produces a temperature of 26 ℃, blower speed 2: current 15.2 A, produces a temperature of 25 ℃, blower speed 3: current 15.5 A, yields a temperature of 24 ℃. Whereas in the car the current and voltage generated by blower speed 1: current 17.4 A, produces a temperature of 21 ℃, blower speed 2: current 17.7 A, produces a temperature of 20 ℃, blower speed 3: current 17.9 A, produces a temperature of 19 ℃. So, the higher the current has an effect on the resulting performance of the air conditioner system. And the lower the current generated, the blower, magnetic clutch and extra fan performance is not optimal when the AC system is running. Sistem Air Conditioner merupakan bagian dari mobil untuk mencapai keyamanan dan keamanan dalam berkendara. Tujuan dari penelitian ini adalah untuk mengetahui arus sistem kelistrikan air conditioner, mengidentifikasi rangkaian kelistrikan dan menganalisis rangkaian kelistrikan sistem air conditioner. Metode penelitian yang digunakan dalam penelitian ini adalah metode eksperimental. Hasil pengujian arus dan tegangan yang dihasilkan pada simulator blower speed 1: arus 15,1 A, menghasilkan suhu 26℃, blower speed 2: arus 15,2 A, menghasilkan suhu 25℃, blower speed 3: arus 15,5 A, menghasilkan suhu 24℃. Sedangan pada mobil arus dan tegangan yang dihasilkan blower speed 1: arus 17,4 A, menghasilkan suhu 21℃, blower speed 2: arus 17,7 A, menghasilkan suhu 20℃, blower speed 3: arus 17,9 A, menghasilkan suhu 19℃. Jadi, semakin tinggi arus berpengaruh pada kinerja yang dihasilkan sistem air conditioner. Dan semakin rendah arus yang dihasilkan membuat kinerja blower, magnetic clutch dan extra fan menjadi tidak maksimal pada saat sistem AC bekerja.

Study on Appropriate Diameter of Centrifugal Fan Surrounded by Heat Exchanger in Air Conditioner

2017 ◽  
Author(s):  
Daiwa Sato ◽  
T. Iwase ◽  
J. Xue ◽  
K. Tsuchihashi ◽  
H. Obara ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Standard Deviation ◽  
Pressure Drop ◽  
Velocity Distribution ◽  
Flow Distribution ◽  
Centrifugal Fan ◽  
Air Conditioner ◽  
Air Conditioners ◽  
Fan Performance

To meet the demand for energy-saving air conditioners, the pressure drop must be reduced and the air velocity distribution of the heat exchanger made uniform to improve the performance of both the fan and the heat exchange cycle. To investigate the effect of the fan on the pressure drop and the velocity distribution, we changed the fan diameter and fixed the shape of the heat exchanger. First, we investigated the fan by comparing the total pressure efficiency when the fan was mounted in an indoor unit and unmounted as a standalone fan. We found that the mounted fan performed worse than the standalone fan. The difference between these conditions was whether the heat exchanger was around the fan. Next, to determine the appropriate diameter, the performance of the mounted fan was evaluated by measuring its efficiency and the fan power. The diameter with the highest efficiency differed from the diameter with the lowest fan power. Because of this, the fan performance was strongly affected by the heat exchanger and the vortex. When the standard deviation of the air flow distribution in the heat exchanger was evaluated, the diameter with the lowest standard deviation was the same as the diameter with the lowest fan power. Since the standard deviation needs to be reduced to improve the performance of both the fan and the heat exchange cycle, the mounting conditions need to be considered to determine the fan shape. Thus, the flow field around the fan was visualized, and the velocity distributions for the investigated diameters were compared. We found the distance between the fan and the heat exchanger was an important factor determining the performance. A fan with the most appropriate diameter was prototyped to evaluate the fan performance. Results revealed it used 3% less power than a standard-diameter fan.

A Real-Time Experimental Method for Room Cooling Load Calculations

2012 ◽  
Vol 433-440 ◽  
pp. 4490-4495 ◽  
Author(s):  
Ting Zhang Liu ◽  
An Hong Gong ◽  
Li Xia Yao
Keyword(s):  
Experimental Method ◽  
Real Time ◽  
Relative Error ◽  
Cooling Capacity ◽  
Energy Simulation ◽  
Cooling Load ◽  
Simulation Tool ◽  
Air Conditioner ◽  
Indoor Temperature ◽  
Cooling Loads

A real-time experimental method for room cooling load calculations is developed in this paper. Experimental based study was also performed during summer months of 2010 in a reference office room in Shanghai. Hourly indoor temperature curves were drawn and the cooling capacity of air conditioner was measured. One energy simulation tool, Designer’s Simulation Toolkits (DeST), was used to calculate the basic dynamic temperature and hourly cooling loads. Comparison of results from real-time experimental method and DeST simulation shows that the proposal model can be used in cooling load calculations, with an average 2.5% relative error to DeST results.

scholarly journals Effect Of Value Of Resistance Announcement To Thd In Electrical System Faculty Of Engineering University Udayana Denpasar

2018 ◽  
Vol 2 (1) ◽  
pp. 21
Author(s):  
I. G. N. Janardana ◽  
I W Arta Wijaya ◽  
I. N. Karnata Mataram
Keyword(s):  
Negative Impact ◽  
Electrical Power ◽  
Harmonic Distortion ◽  
Air Conditioner ◽  
Electrical System ◽  
Nonlinear Load ◽  
Grounding System ◽  
Ground Resistance ◽  
Standard Value ◽  
College Of Engineering

AC (Air Conditioner), TV, lamp, LCD and others are categorized as nonlinear load generating harmonics. The high content of harmonics has a negative impact on the quality of electrical power. The result of measurement of THD (Total Harmonic Distortion) current at 9 ohm ground resistance value at phase R = 9,8%, phase S = 11,0%, phase T = 7,5% exceed from standard value IEEE 519 Year 2014 equal to ? 5 , 0%, THD measurement of phase voltage R = 1.4%, phase S = 1.2%, phase T = 1.3%, meet the maximum THDv standard of ? 5%. To overcome this problem, it was observed the effect of the value of ground resistance to THDi and THDv on the electrical system of the College of Engineering Faculty of Denpasar. This method of analysis with ETAP software simulation. With grounding system ? 3 ohm only effect on current THD only with decreasing value of THDi become: phasa R = 4,2%, phase S = 5% and phase T = 4,3%, meaning with grounding system ? 3 ohm THD current fulfill IEEE 519 - 2014 standard <5%. while THD voltage has no effect (THD value of fixed voltage). Several studies have suggested that THD repair can be done by filter installation. However in this study the installation of grounding system ? 3 ohms can reduce the value of current THD.

scholarly journals An electrical method for the study of impact applied to the struck string

1925 ◽  
Vol 108 (746) ◽  
pp. 284-295 ◽  
Keyword(s):  
Experimental Determination ◽  
Experimental Method ◽  
Electrical Resistance ◽  
Electrical Circuit ◽  
Considerable Importance ◽  
Mechanical Pressure ◽  
Electrical Method ◽  
The Impact ◽  
Two Bodies

In the study of impact the time during which the two bodies are in contact and the pressure variations during that time are of considerable importance. For the experimental determination of the duration of the impact the electrical method introduced by Pouillet is usually used. This consists in allowing an electrical circuit to be completed by the contact between the two impinging bodies, and in measuring the total quantity of electricity which passes through the circuit, by means of a ballistic galvanometer, during the impact. An essential part of the calculation is the assumption that the electrical resistance of the circuit is constant, and in order to justify this assumption a large non-inductive resistance is usually included in the circuit. It is then supposed that the variation in the electrical resistance of the contact, due to the variation in mechanical pressure which is known to be present, may be neglected. The main feature of the experimental method used in the present research is that here a Duddell oscillograph has been substituted for the ballistic galvanometer used in the researches of previous workers. By this means advantage is taken of the variation in electrical resistance to obtain information about the corresponding variation in mechanical pressure.

Analysis of the Magnetic Field and the Magnetic Force in a Magnetic Clutch of the Automotive Air Conditioner

1997 ◽  
Author(s):  
Gunhee Jang ◽  
Kyungho Lee ◽  
Kwangil Kim ◽  
Yongkil Cha ◽  
Taeyoung Park ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Force ◽  
Air Conditioner ◽  
Magnetic Clutch ◽  
The Magnetic Field

Prediction of Aerodynamic Noise for Centrifugal Fan of Air-Conditioner by Tetra-Prism Grids

2019 ◽  
Author(s):  
Taku Iwase ◽  
Daiwa Sato ◽  
Hideshi Obara ◽  
Yoshinobu Yamade ◽  
Chisachi Kato
Keyword(s):  
Design Method ◽  
Aerodynamic Noise ◽  
Centrifugal Fan ◽  
Air Conditioner ◽  
Simulation Code ◽  
Fan Performance ◽  
Eddy Simulation ◽  
Practical Usefulness ◽  
Large Eddy ◽  
Prism Layer

Abstract We calculated fan performance and aerodynamic noise in the centrifugal fan of air conditioner by large eddy simulation (LES). In this study, we investigated simulation technology employing tetra-prism grids for practical usefulness. Tetraprism grids are easier to generate than hexahedral grids. We employed the numerical simulation code FrontFlow/blue (FFB) throughout the LES. First, we proposed a design method for tetra-prism grids. The design method featured a predicted boundary layer thickness that was the same as the thickness of a prism layer. Next, we compared calculated results for the 13 million grids, 107 million grids and 860 million grids to investigate the grid number influence on fan performance and aerodynamic noise. We confirmed that calculated results for larger number of grids was more accurate than smaller number of grids. We also confirmed that calculated results simulated streaks well and the number of streaks increased in the order of the increasing number of the grids. The proper simulating of the streaks therefore contributed to getting better calculated results. As a result, we confirmed that using the tetra-prism grids was practical in the actual development of fans.

Experimental Method in Antiquity.

1964 ◽  
Vol 19 (6) ◽  
pp. 419-419
Author(s):  
Frank P. Jones
Keyword(s):  
Experimental Method

Monitoring bedload sediment transport in a pre-Alpine river: an experimental method

2017 ◽  
Vol 43 ◽  
pp. 57-63 ◽  
Author(s):  
Monica Papini ◽  
Vladislav Ivov Ivanov ◽  
Davide Brambilla ◽  
Diego Arosio ◽  
Laura Longoni
Keyword(s):  
Sediment Transport ◽  
Experimental Method ◽  
Alpine River ◽  
Bedload Sediment

“I stay at work for you, you stay at home for us.” Does this Covid-19 campaign work for the youth in Asia?

2020 ◽  
Vol 8 (2) ◽  
pp. 161-175
Author(s):  
Jappy Fanggidae ◽  
Ridolof Batilmurik ◽  
Pieter Samadara
Keyword(s):  
Experimental Method ◽  
Social Distancing ◽  
Asian Context ◽  
The Relationship ◽  
At Home

This study investigated the relationship between guilt appeal and compliance with social distancing measures. We proposed that the relationship is double mediated by empathy and responsibility for the unfortunate people who have suffered from COVID-19. This research is novel to an extent as an experimental method is used in the Asian context. The results exhibited that guilt positively affected compliance with social distancing measures. The respondents were directly or indirectly compliant due to the emotions of empathy and responsibility. The theoretical and practical contributions of this study were presented.

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