Kajian PLTS on–grid pada gedung X Politeknik Negeri Malang untuk melayani beban perkantoran menggunakan perangkat HOMER PRO

JURNAL ELTEK ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 96
Author(s):  
Priya Surya ◽  
Mochammad Junus
Keyword(s):  
Large Scale ◽  
Service Providers ◽  
Energy Requirement ◽  
Power Converter ◽  
Solar Panel ◽  
Capacity Factor ◽  
Small Scale ◽  
Solar Panels ◽  
Daily Production ◽  
Cost Of Energy

Pembangkit Listrik Tenaga Surya (PLTS) dapat diaplikasikan mulai skala kecil sampai skala besar, itu merupakan keunggulan teknologi ini. Dalam skala kecil, pemanfaatan energi surya dapat diaplikasikan di setiap atap rumah untuk memenuhi kebutuhan listrik tiap konsumen residential / rumah tangga. Untuk kebutuhan ini, sistem PLTS dilakukan secara on – grid yaitu terhubung dengan jaringan yang sudah tersedia yaitu jaringan penyedia layanan listrik seperti PLN. Pada penelitian ini, objek penelitian adalah Gedung X pada Politeknik Negeri Malang, dimana kebutuhan bebannya sebesar 12,5 kW dan kebutuhan energi harian 64 kWh. Menggunakan aplikasi HOMER PRO didapatkan untuk sistem dengan skema PV, Baterai, Grid PLN, dan konverter, maka Skematik yang diusulkan pada sistem PLTS adalah menggunakan solar panel dengan total daya terpasang sebesar 11 kWp, dan ditambah dengan baterai sebesar 1500 Ah, konverter daya sebesar 6 kW , dan grid PLN tetap sebagai suplai utama. Untuk bisa mengurangi  tagihan listrik, dilakukanlah Renewable Fraction (RF) sebesar 58,5 %, sehingga didapatkan produksi harian untuk solar panel sebesar 45,6 kWh, yaitu sebesar 68 % kebutuhan harian dengan capacity factor sebesar 17,3 %. Solar panel yang digunakan merk ICASOLAR dengan kapasitas 250 Wp membutuhkan sebanyak 44 panel dengan total luasan yang diperlukan sebesar 57 m2 pada atap gedung. Secara ekonomis didapatkan bahwa Net Present Cost pada sistem ini adalah sebesar Rp. 183.000.000,- dan nilai Cost of Energy sebesar Rp. 484,58,- / kWh.   PLTS can be applied from small to large scale, that is the advantage of this technology. On a small scale, the use of solar energy can be applied on every roof of the house to meet the electricity needs of each residential / household consumer. For this need, the PLTS system is carried out on an on-grid basis, which is connected to an already available network, namely a network of electricity service providers such as PLN. In this study, the object of research is Building X at the State Polytechnic of Malang, where the load requirement is 12.5 kW and the daily energy requirement is 64 kWh. Using the HOMER PRO application obtained for systems with PV schemes, Batteries, PLN Grids, and converters, the proposed Schematic for the PLTS system is to use solar panels with a total installed power of 11 kWp, and coupled with a 1500 Ah battery, a power converter of 6 kW , and the PLN grid remains as the main supply. To be able to reduce electricity bills, Renewable Fraction (RF) is carried out by 58.5%, so that the daily production for solar panels is 45.6 kWh, which is 68% of daily needs with a capacity factor of 17.3%. The solar panels used by the ICASOLAR brand with a capacity of 250 Wp require 44 panels with a total required area of ​​57 m2 on the roof of the building. Economically, it is found that the Net Present Cost in this system is Rp. 183,000,000,- and Cost of Energy amount Rp. 484,58,- / kWh.

scholarly journals A Review on Self Cleaning and Tracking of Photovoltaic Panel

2021 ◽  
pp. 78-85
Author(s):  
Adithya P ◽  
Harsha Awate ◽  
Nikitha L ◽  
Vidhyashree H S ◽  
P Praveen
Keyword(s):  
Natural Resources ◽  
Large Scale ◽  
Electrical Energy ◽  
Solar Panel ◽  
Energy Output ◽  
Small Scale ◽  
The Sun ◽  
Solar Panels ◽  
Photovoltaic Panel ◽  
Pv Module

Solar panels are used to convert the energy from sunlight to electrical energy. The different impacts on the solar panel which influences the productivity of the solar panel are Sun movement and dirt which generate the fundamental impact on solar panel. Because of those impacts, less yield generated by solar panel so to increase the effectiveness of the solar panel is by utilizing tracking and cleaning technique. There is a framework which is mix of tracking and cleaning. In this cutting-edge world, power is likewise added to the most fundamental requirements in everybody's day to day existence. With the expanding request of power, destruction of the natural resources is done and will be used for energy generation. To adjust the shortage of natural resources unconventional fuels are used for power generation and are used by the most part of world. Among all the unconventional fuel sources, power created by solar panel energy is broadly utilized. The abundancy of this type of energy is more all around the earth. A framework which tracks sun as well as automatic washing of solar panel with automated instructions is required. The instrument requires a LDR for following the sun and for cleaning wiper module is required. Regarding every day energy production, the sun tracking - cum cleaning plan gives more energy output when contrasted with the fixed PV module. Without this framework this cleaning work is done by man force which is good for small scale but for large scale like power plant it is very difficult. Then led display is required to display the result of the framework.

scholarly journals IoT Implications in Solar Energy: Innovation, Management & Operation

2020 ◽  
Author(s):  
SHANTANU DUBEY
Keyword(s):  
Solar Energy ◽  
Power Plants ◽  
Large Scale ◽  
Innovation Management ◽  
Photoelectric Effect ◽  
Solar Panel ◽  
Small Scale ◽  
Solar Panels ◽  
Requirements Process ◽  
Solar Power Plants

Solar energy is the fastest growing renewable source of energy (40% increase p.a. worldwide). The sunrays hit the solar panel surface and the photons present in sunlight create a photoelectric effect and hence generate electricity. The tilt angle for the solar panel is dependent on the latitude of the place. Solar energy is trough out the year and solar power plants need to be monitored for optimum power output, which can be, efficiently and effectively done with the use of IoT. The poster studies cases for small scale (household solar panels) and large scale (industrial solar plants). The general requirements, process, and implementation are also explored.

Large Scale Physical Disruptions in the Electronic Communication Sector

2013 ◽  
pp. 50-60
Author(s):  
David Sutton
Keyword(s):  
Large Scale ◽  
Electronic Communication ◽  
Service Providers ◽  
Small Scale ◽  
Electronic Communications ◽  
Communication Sector

While small-scale disruptions that affect the electronic communications sector are frequent, their impact is generally relatively low, and recovery can be extremely fast. However, large-scale disruptions that have a major impact on the electronic communications sector are relatively uncommon. It is as a consequence of these two facts that Communications Service Providers (CSPs) place the majority of their effort (where possible) into the planning for prevention of small-scale disruptions, and recovery from those that do occur.

Community Monitoring Improves Public Service Provision at Scale: Experimental Evidence from a Child Development Program in Nicaragua

2020 ◽  
Author(s):  
Florencia López Boo ◽  
Jane Leer ◽  
Akito Kamei
Keyword(s):  
Child Development ◽  
Experimental Evidence ◽  
Large Scale ◽  
Service Providers ◽  
Low Cost ◽  
Development Program ◽  
Small Scale ◽  
Community Monitoring ◽  
Quality Assurance Mechanism ◽  
Intent To Treat

Expanding small-scale interventions without lowering quality and attenuating impact is a critical policy challenge. Community monitoring overs a low-cost quality assurance mechanism by making service providers account-able to local citizens, rather than distant administrators. This paper provides experimental evidence from a home visit parenting program implemented at scale by the Nicaraguan government, with two types of monitoring: (a) institutional monitoring; and (b) community monitoring. We find d a positive intent-to-treat effect on child development, but only among groups randomly assigned to community monitoring. Our findings show promise for the use of community monitoring to ensure quality in large-scale government-run social programs.

scholarly journals A Study on Comparison of Network Location Efficiency of Web Application Firewall

2018 ◽  
Vol 7 (3.33) ◽  
pp. 183
Author(s):  
Sung-Ho Cho ◽  
Sung-Uk Choi ◽  
. .
Keyword(s):  
Web Services ◽  
Web Application ◽  
Large Scale ◽  
Service Providers ◽  
Web Security ◽  
Small Scale ◽  
Internet Service ◽  
Large Scale Networks ◽  
The Web ◽  
Line Type

This paper proposes a method to optimize the performance of web application firewalls according to their positions in large scale networks. Since ports for web services are always open and vulnerable in security, the introduction of web application firewalls is essential. Methods to configure web application firewalls in existing networks are largely divided into two types. There is an in-line type where a web application firewall is located between the network and the web server to be protected. This is mostly used in small scale single networks and is vulnerable to the physical obstruction of web application firewalls. The port redirection type configured with the help of peripheral network equipment such as routers or L4 switches can maintain web services even when physical obstruction of the web application firewall occurs and is suitable for large scale networks where several web services are mixed. In this study, port redirection type web application firewalls were configured in large-scale networks and there was a problem in that the performance of routers was degraded due to the IP-based VLAN when a policy was set for the ports on the routers for web security. In order to solve this problem, only those agencies and enterprises that provide web services of networks were separated and in-line type web application firewalls were configured for them. Internet service providers (ISPs) or central line-concentration agencies can apply the foregoing to configure systems for web security for unit small enterprises or small scale agencies at low costs.  

scholarly journals PERHITUNGAN BIAYA OPERASI DAN PERAWATAN PLTN SKALA BESAR DAN KECIL

2015 ◽  
Vol 17 (2) ◽  
pp. 87
Author(s):  
Mochamad Nasrullah ◽  
Wiku Lulus Widodo
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Large Scale ◽  
Secondary Data ◽  
Capacity Factor ◽  
Maintenance Cost ◽  
Small Scale ◽  
Operation And Maintenance ◽  
Operation And Maintenance Cost

ABSTRAK PERHITUNGAN BIAYA OPERASI DAN PERAWATAN PLTN SKALA BESAR DAN KECIL. Biaya pembangkit PLTN terdiri dari tiga komponen, yaitu biaya investasi, bahan bakar dan operasi perawatan (O & M). Besarnya biaya O&M pada PLTN besar dan kecil tidaklah sama. Studi ini bertujuan untuk menghitung biaya O&M PLTN skala besar dan kecil dengan mempertimbangkan parameter teknis dan ekonomis yang diambil dari berbagai data sekunder dan sumber lainnya. Studi dilakukan menggunakan data dari PLTN jenis PWR dengan daya 1343 MWe untuk PLTN ukuran besar dan daya 90 MWe untuk PLTN ukuran kecil. Asumsi digunakan tingkat eskalasi sebesar 5%, faktor kapasitas 90%. Metodologi yang digunakan adalah menghitung dengan spreadsheet yang meliputi skala masing-masing komponen O&M. Hasil perhitungan menunjukkan biaya O & M jika dihitung dengan satuan juta US$/tahun, maka biaya O&M PLTN 1343 MWe sebesar 99,21 juta US$/tahun lebih mahal dari PLTN 90 MWe sebesar 45,13 juta US $/tahun. Namun jika biaya O & M PLTN 1343 MWe dihitung dengan satuan mills $/kWh, maka hasilnya  sebesar 9,37 lebih murah dibandingkan dengan PLTN 90 MWe yaitu sebesar 63,70 mills $/kWh. Hal ini berarti semakin kecil ukuran kapasitas dayanya maka biaya operasi dan perawatannya semakin mahal. Penyebab perbedaan biaya operasi dan perawatan antara PLTN skala besar dan kecil, adalah kapasitas daya, faktor kapasitas, jumlah personal yang bekerja pada biaya administrasi umum pegawai dan manajemen, operasi pembangkit tahunan, biaya tenaga kerja offsite. Kata kunci : Biaya operasi dan perawatan, PLTN, LEGECOST ABSTRACT CALCULATION OF OPERATION AND MAINTENANCE COST FOR LARGE AND SMALL SCALE NPP. The generation cost of nuclear power plant consists of three components:  investment costs, fuel cost operation and maintenance (O&M) cost. O&M costs in the large scale of NPP is different from small scale NPP. The objective of this study are to calculate the O&M cost of large NPP and small NPP by considering technical and economic parameters from secondary data and  other references. This study uses 1343 MWe PWR data for large NPP and 90 MWe PWR for small NPP. The assumptions are 5% escalation level and 90% capacity factor. The methodology for calculation using spreadsheet with scaling methods for each O&M components. The results shows that the O &M cost if calculated in units of million US$/year, the O&M cost of NPP 1343 MWe is US$million 99.21/ year which is more expensive than the O&M cost of NPP 90 Mwe which is only US$million 45.13/ year.  But if the cost of O&M 1343 MWe nuclear power plant unit is calculated in units of mills $/kWh, the result shows that the O&M cost is 9.37 mills $/kWh which is less than the 90 MWe NPP which reaches $ 63.70 mills/kWh. The conclusion is  lower NPP capacity  has higher O&M cost. Different O&M cost is caused by power capacity, capacity factor, the amount of worker on site staff, the annual net generation and the offsite technical support. Keywords: Operation and maintenance cost, NPP, LEGECOST 

Appropriate technologies for the future

1980 ◽  
Vol 209 (1174) ◽  
pp. 183-186 ◽  
Keyword(s):  
Food Production ◽  
Large Scale ◽  
Low Cost ◽  
Health Needs ◽  
Small Scale ◽  
Cost Of Energy ◽  
Prophylactic Measures ◽  
The Future ◽  
The Individual ◽  
The Third World

Crystal ball gazing is a hazardous occupation: the sharper the picture, the greater the possibility of error. In the future, appropriate technologies that will raise standards of health and diminish the prevalence of disease in the Third World must take cognizance of such factors as burgeoning population growth, impossibly high cost of energy sources, a widening gap between food requirements and food production, increasing urbanization, and inherent difficulties of control of disease vectors and water-borne diseases. The technologies that must be made available will be both large-scale and small-scale, low-cost and simple, improving life for the individual and the community, mediated by appropriately trained and adequately supervised polycompetent auxiliaries. The present reappraisal of health needs in the context of food (seeds, soils, irrigation, protection against loss of the harvested products) and of prevention of disease by appropriate prophylactic measures and its treatment, will necessitate hard thinking and greater cooperation between all concerned.

scholarly journals A Heat Pump-Based Multi-source Renewable Energy System for the Building Air Conditioning: The IDEAS Project Experience

2021 ◽  
Vol 65 (1) ◽  
pp. 12-22
Author(s):  
Silvia Cesari ◽  
Alessia Natali ◽  
Barbara Larwa ◽  
Eleonora Baccega ◽  
Elena Mainardi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Heat Pump ◽  
Thermal Energy ◽  
Heat Exchangers ◽  
Large Scale ◽  
Energy System ◽  
Building Envelope ◽  
Small Scale ◽  
Solar Panels ◽  
Renewable Energy System

The current paper presents the state-of-the-art of the ongoing IDEAS research project, funded under the Horizon 2020 EU framework programme. The project involves fourteen partners from six European countries and proposes a multi-source cost-effective renewable energy system for the decarbonisation of the building envelope. The system features a radiant floor fed by a heat pump for the building thermal management. The heat pump can exploit sun, air, and/or ground as thermal sources through the use of photovoltaic/thermal solar panels, air heat exchangers, and shallow ground flat-panel heat exchangers. Thermal energy storage is achieved by means of phase change materials spread along several system components, such as: radiant floor to increase its thermal inertia, solar panels for cooling purposes, ground to enhance soil thermal capacity. Within the project framework, a small-scale building, featuring a plethora of sensors for test purposes, and two large-scale buildings are meant to be equipped with the renewable energy system proposed. The small-scale building is currently in operation, and the first results are discussed in the present work. Preliminary data suggest that while multi-source systems coupled with heat pumps are particularly effective, it is complex to obtain suitable thermal energy storages on urban scale.

scholarly journals Cymatics Inspired Self-Cleaning Mechanism for Solar Panels

2020 ◽  
Author(s):  
Edwin Babu ◽  
Sumith Yesudasan ◽  
Sibi Chacko
Keyword(s):  
Large Scale ◽  
Structural Integrity ◽  
Mechanical Vibration ◽  
Solar Panel ◽  
Solar Array ◽  
Great Effort ◽  
Solar Panels ◽  
Element Analysis ◽  
Solar Arrays ◽  
Self Cleaning

The Photovoltaic modules are usually installed on the ground which exposes it to surface deposition of foreign particles. In the Middle East and North Africa region, the primary culprit is dust and sand. They form an insulating and opaque layer on the surface of the glass, which obstructs its heat transfer and optical properties, thereby reducing the overall yield efficiency of the solar panel. Cleaning of this layer is critical to the operation of the solar panel and often requires great effort and energy on a large-scale solar array. In this paper, we propose a novel self-cleaning mechanism for solar panels, with an understanding of the structural integrity of the Photovoltaic laminate and application of external mechanical vibration. By applying an external source of vibration, the solar panels vibrate, excites its fundamental frequencies and cleans by its own. The method is analyzed using finite element analysis method and tested using experiments. Our simulation results based on IEC 61215 show that the maximum principal stress and deformation in the critical layers is within limits. Our experimental results prove the proposed theory is feasible and can be extended to large scale solar arrays. Our proposed method is retrofittable and could save money, energy and effort in cleaning the solar arrays, which can replace current techniques.

scholarly journals Parametric analysis of gravity Vortex turbines as a low cost renewable energy alternative from low head hydraulic resources

2020 ◽  
Vol XXIII (1) ◽  
pp. 22-28
Author(s):  
Deniz Ünsalan
Keyword(s):  
Wave Energy ◽  
Rural Areas ◽  
Parametric Analysis ◽  
Power Plants ◽  
Large Scale ◽  
Energy Requirement ◽  
Low Cost ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Small Streams

The long existent worldwide trend for large scale hydroelectric power plants, relying on dams are now under severe criticism for the large areas their reservoirs occupy, which are often fertile agricultural areas and sometimes flood cultural heritage sites. However, there are also environment-friendly alternatives for hydroelectric power production, which are capable to obtain energy from small scale streams with relatively low heads. Such smaller scale sources with low cost facilities can be used for electric production by alternative schemes that use small streams, irrigation canals and divertions from rivers, tidal pools, overtopping wave energy converters and urban wastewater. One of the recent types of such plants are the gravity vortex turbines that use the naturally occurring “sink vortex” draining such water. They are highly efficient and able to obtain energy from sources with flow rates as low as 1 m3/s and heads as low as 0.80 m. Such water sources are abundant in most of the rural areas and it is possible to obtain either an important part or the total need of the energy requirement of the nearby communities with such systems. Gravity vortex turbines have low costs due to their simple structure and are easy to maintain. They can also be implemented for overtopping wave energy and tidal energy systems, as well as recovery units of pumped energy storage schemes. The purpose of this paper is to propose relations for the design and parametric analysis to size the relevant parts of the plant- the pool and the turbine. Potential flow is assumed throughout the analysis. Attempts to obtain optimized relations between the relative sizes and rotational speeds for the pool, water source, turbine are made and inputs for preliminary design are obtained.

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