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2013-05-08 08:51:40
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2013-05-08 08:51:25
FKIP Untirta Gelar Gebyar Hardiknas 2013
2013-05-08 08:50:53
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Publikasi Penelitian Dosen

The Performance of Pump as Turbine with Machined Impellers
Abstrak

Pump as turbine (PAT) is a type of micro hydro power plant, which uses a commercial pump as a turbine in order to generate electricity. Most of PAT facilities used centrifugal pump. The main component of the pump is impeller, which commonly produced by using casting process. However, this paper describes a manufacturing process to produce PAT impeller by using machining process. Four impellers were produced from two variations of materials (brass and AA-7075), each with 5 and 6 blades. The impellers were tested in a laboratory scale PAT power-plant facility, and the performance of each impeller was compared to its original impeller. The experiment results show that the impeller with 6 blades made of brass material improves 48.9% of power generated.

Penulis : DEDE LIA ZARIATIN , Dr. S.T. , M.T [PDF File] didownload : 34 x

Design of Pump as Turbine Experimental Test Facility
Abstrak

This paper presents the design process of experimental test facility for pump as turbine hydropower system.

Three design possibilities that related to the PAT condition of operation was developed and analyzed by using CFD

Software. It is found that the First Variant with a straight flow to the PAT will produce higher velocity, which is

needed to generate more rotation of the shaft generator, in order to generate more electric power. The strength of PAT

construction was analyzed by using FEM software. It was found that the maximum stress is 6 MPa and can be

concluded that the construction is appropriate to the design requirement.

1 Introduction

Hydropower is the cleanest energy provided by nature.

Utilization of hydropower system becomes worldwide,

especially in the area that has the supporting resources.

There are many types of turbine used in hydropower

system, such as Pelton, Kaplan turbine, Francis reaction

turbine, Pump as Turbine (PAT), etc. PAT technology

that first introduced in 1931 [1] is one of a micro

hydropower system that used an available commercial

pump as a turbine in order to generate rotational

movement. PAT has several advantages such as 53% cost

equipment reduction compare to another hydropower

system [2], the power source availability, simple design

and easy to install [3], components are available in the

market [3], and long life time up to 25 years.

In order to perform researches on PAT characteristic

and technology, a laboratory scale PAT installation was

required. Figure 1 shows an open PAT experimental test

facility used other researchers. There are two types of test

facility that used by other researchers. The first type is a

test facility that has a direct flow from the pump to PAT,

used by Jain et al. [4], Yang et al [5], etc. The second

type is a test facility that has a tank which provide a water

drop from a certain height, used by Giosio et al. [6],

Singh and Nestmann. [7], Suarda et al. [8].

The second type of test facility which has a reservoir

tank, is

Penulis : DEDE LIA ZARIATIN , Dr. S.T. , M.T [PDF File] didownload : 34 x

AIR POLLUTION BY PUBLIC UTILITY BUS COMPANIES IN JAKARTA: A BASIS FOR AN ACTION PROGRAM TOWARDS SOCIAL RESPONSIBILITY
Abstrak

DISSERTATION ABSTRACT 1999

This study sought to find out reliable and sufficient data in order to formulate and arrive at courses of action that would solve the problems regarding bus companies’ social responsibility relative to air pollution in Metropolitan Jakarta. Specifically, the study answers the following questions: How is air pollution reckoned in Jakarta in terms of factor causing air pollution, effects of air pollution. What government offices are concerned with air pollution and what are their policies, rules and regulations. To what extend do the public utility companies comply with the government’s air pollution rules and regulations in terms of standard ambient, type of engine and devices and engine life time. What is the status of bus company in terms of proportion between private and public utility vehicle, number of trips every day, types of engine, types of gasoline, number of jobs shifts. How do the passengers perceived the compliance of bus drivers in terms of air pollution rules and regulation, courtesy of drivers, bus driver’s physical condition, safety of passengers, comfort of passengers. Are there significant differences among the government’s practices to minimize air pollution in terms of standard ambient, air pollution rules and regulations, safety of passengers. What problems are encountered in the exercise of social responsibility with regards to air pollution as perceived by the government and the PUV companies. What courses of action should be taken to improve the social responsibility of public utility bus companies in relation to air pollution? The government, business sector and passengers could providing some assistant to be integrated and synchronized in terms of service, technology, traffic and air pollution rules and regulations for the PUV bus companies in order to improve their means of operation more socially responsible, with acting more environmentally friendly, provide passengers satisfaction to improve society’s quality of life and at the same time they can have company’s sustain growth and profits. 

Penulis : GATUT LUHUR BUDIONO, PhD. MBA. [PDF File] didownload : 30 x

Pengaruh EPS, CR, dan DER Terhadap Harga Saham Perusahaan Transportasi yang Go Public di Bursa Efek Indonesia (BEI) Pada tahun 2013-2015
Abstrak

One source of funds obtained by the company is derived from the sale of shares. Stock price changes up or down time by time, and it is influenced by many factors. This research was conducted to examine the effect of Earning Per Share (EPS), Current Ratio (CR), Debt To Equity Ratio (DER), on stock price in the Transportation Sector Listed in Indonesia Stock Exchange (IDX) in the period 2012-2015.The data used in this research is a secondary data obtained from Indonesia Stock Exchange in the Transportation Sector. Based on the research result that the Earning Per Share (EPS) has significant positive effect on Stock Price. Meanwhile, Debt To Equity Ratio (DER) has negative effect on the stock price and Current Ratio (CR) does not have significant on the stock price

Penulis : INDAH MASRI, S.E., M.S.Ak [PDF File] didownload : 29 x

Analisis Pengaruh Pendidikan dan Pelatihan, Pengalaman Kerja, serta Pemanfaatan Teknologi Informasi Terhadap Kualitas Laporan Keuangan Pemerintah Daerah (Studi Kasus Pada Pemerintah Kota Depok)
Abstrak

Tujuan penelitian ini adalah untuk mengetahui pengaruh pendidikan dan pelatihan, pengalaman kerja Serta pemanfaatan teknologi informasi terhadap kualitas laporan keuangan daerah. Penelitian ini menggunakan data primer yaitu kuesioner. Kuesioner disebar sebanyak 60 dan kembali sebanyak 55 kuesioner. Responden yang mengisi kuesioner tersebut adalah pegawai pengelola keuangan Pemerintah Kota Depok. Teknik analisis data menggunakan analisis regresi linear berganda. Hasil penelititan menunjukan bahwa pendidikan dan pelatihan tidak berpengaruh signifikan terhadap kualitas laporan keuangan daerah, pengalaman kerja tidak berpengaruh signifikan terhadap kualitas laporan keuangan daerah. Sedangkan pemanfaatan teknologi informasi berpengaruh positif dan signifikan terhadap kualitas laporan keuangan daerah. Hasil penelitian ini mendukung penelitian Irfan Ikhwanul Haza (2015) dan Siti Soimah (2014) bahwa pemanfaatan teknologo informasi berpengaruh sginfikan terhadap kualitas laporan keuangan pemerintah daerah.

Penulis : INDAH MASRI, S.E., M.S.Ak [PDF File] didownload : 29 x

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