DC House Research Articles

Smart Charge Controller using Buck Converter Topology for Bicycle Power Generator in DC House Electrical Grid

Smart Charge Controller using Buck Converter Topology for Bicycle Power Generator in DC House Electrical Grid

The House Project: A Sustainable Alternative For Rural Electrification

In recent years there has been an outburst of interest in the use of renewable energy sources to reduce greenhouse gas emissions. These renewable energy sources are generally putting out dc power and hence some intermediate energy conversion to ac is essential for its use. Unfortunately, this much needed conversion yields not only extra cost to the system but also introduces power loss which consequently reduces system's efficiency. This DC House project aims to utilize the dc energy directly from renewable energy sources without the need for dc to ac conversion. Besides enhancing system's efficiency while reducing cost, the DC House's main use will be in locations where utility grid is out of reach or geographically inaccessible; hence, the opportunity to promote the use of renewable energy sources while providing electricity to those people who are less fortunate.

Rancang Bangun Prototype Smart Dc House

Solar energy is a source of livelihood for living things that is available in very large quantities, is not polluting, will not run out but is free. However, it is rarely found that the function and benefits of the sun are massive. One of the uses of solar energy is the use of solar cell panels as a renewable energy generator that can produce DC electricity. This study aims to design a smart DC home using a Solar Power Plant (PLTS). This study also aims to calculate the output power of the DC House. Accordingly, the research was conducted with hardware design and software design. Data collection is done by testing and observation techniques. Researchers based on research and discussion can say that they have succeeded in designing a Smart DC House with a total energy requirement used per day, which is 122.2 watt-hours per day. The output power obtained from the system is around 153 watt-hours per day with the specifications of the solar module used with a capacity of 50 Wp with a minimum battery capacity of 38 Ah. This system is built with a house size of 112 cm x 70 cm x 40 cm which consists of a bedroom, bathroom, living room, terrace, and kitchen with a microcontroller as a processor, the sensors used are LDR sensors, raindrop sensors, and infrared photodiode sensors. with the advantages of the system, namely the roof that can open and close automatically

Modelling Home Appliances of DC House Based on Rooftop Photovoltaic Power Supply

The implementation of rooftop photovoltaic (PV) system in Indonesia mostly using inverter to convert the DC voltage supply into AC voltage supply to power the AC home appliances. This inverter is a complex and expensive electronics system. Many of the rooftop PVs are in fault condition due to the failure of their inverters. Therefore, the trends of applying everything’s DC source has been recently developed. This paper examines the modelling of several home appliances (i.e., refrigerator, television, washing machine, air conditioner, crockpot, laptop, mobile phone charger, and LED lightings) of a DC house, which is powered by the rooftop PV using the MATLAB/SIMULINK platform. This proposed model considers the PV (solar cell) module, chargecontroller, battery, and the home appliances as the end load of the system. As the results, this model then analyses and compares to the PV system that powered the AC home appliances to get better vision of DC home appliances that can be implemented in the community

House price prediction using polynomial regression with Particle Swarm Optimization

This paper combines the characteristics of the real Washington DC house price estate market and the theoretical model of housing prices to conduct an empirical analysis and comparison of the current mainstream housing price index prediction models. It is found that the current mainstream model only studies the trend of the housing price index itself, and is not sensitive to the characteristics of the house itself. Therefore, this paper uses a multiple regression model to integrate the advantages of external factors and use the improved housing price composition establishing a multiple regression prediction model with the particle swarm optimization. It not only makes up for the disadvantages of poorly determined housing price regression indicators and lack of statistical data in multiple regression prediction, but also enables the model to reflect the inflection point of housing prices in advance. PSO is used for selection of affect variables and regression analysis is used to determine the optimal coefficient in prediction.

Design load controller and load shedding mechanism at DC house prototype

The DC house project is a pure DC electricity system to enable optimal use of renewable and alternative energy, DC House promotes a more sustainable solution by not using fossil-based fuels. DC sources are mainly from renewable generation, such as PV and wind turbines, the output from PV and Wind turbine produced is not stable, so there is a need for a regulatory system, arrangements can be made on the generation side and on the load side. Because the output of the generator is not constant, a setting on the load side is needed to adjust the generation capacity. If one of the offsets is to be released, a load shedding must be carried out to meet the load requirements. The release of the load is carried out when the supply is reduced because one of the generators is off, then the lower priority load will be released automatically. In this study simulated DC loads using PID control on the buck converter and load release using switching four loads with priority scale. The DC current sensor is used to determine the amount of current when determining the load released due to limited supply from the source.

Design of DC Wirings for Urban House in Indonesia Including Analysis on Appliances, Power Losses, and Costs: An alternative to Support Rooftop PV Uptake

Most of the application of solar PV in Indonesia uses inverter, which is a complex and expensive electronics system. Many of the PV plants are in fault condition due to the failure of the inverter. This paper proposed DC wirings powered by solar PV for houses in the urban area of Indonesia. First, the paper reviewed the availability of electrical appliances powered by DC voltage supply. Secondly, it presents AC and DC house wiring designs for a house with 1 300 VA electrical power limit. Losses of both wirings are analyzed and compared, including the cost of wirings materials. The survey showed appliances such as air conditioning, fridgefreezer, television, washing machine, and other appliances are now available in DC voltage supply. A 48 V DC bus is chosen to minimize losses. From a cost perspective, AC and DC wiring systems are comparable, but the DC house is slightly more expensive due to the cost of appliances. The cost of DC wirings is lower due to the lower cost of the DC-DC converters and uses fewer conductors. The results provide an alternative to using solar PV directly distributed as DC voltage for the houses in the urban area of the country.

Perancangan Sistem Pemanenan Energi Surya Terintegrasi Kaca Bangunan, Studi Kasus: Gedung Bandar Lampung

In this paper, design of solar energy harvesting system which integrated in building glass window was proposed. The location as the design reference is Bandar Lampung Building. Bandar Lampung Building uses 90% of the glass on the outside walls building with facing the sunrise and sunset. The design solar energy harvesting system was consisted of solar glass and electronic power system. Solar glass using several mini PV affixed on the glass with space in between, so partially of sunlight pass into the room. The solar energy harvesting system used for DC house network and not connected to the grid system. The solar energy harvesting is also equipped with power electronic system such as MPPT, lead acid battery, and DC-DC converter. The design of solar energy harvesting system is using calculative method based on secondary data several references for this case. Area of the solar glass reaches 16.32 m2 for 1 office room scale. The ratio between PV and room glass about 0.35. The power average of the solar glass on the glass building with facing to the sunrise is about 74.35 W, and then the average power of the solar glass with facing to the sunlight about 161.32W.

Control of BLDC Motor Air Cooler for Low Voltage DC House

Recent power sector targets on cleaner and sustainable generation and distribution system. This can be done by improving DC based applications for low voltage DC residential homes. During summer air cooling systems are very much useful in reducing the room temperature. Brushless-DC (BLDC) motors are best suited these days as electric motors of fans and air cooling systems with very low power utilization and many other reasons like lesser maintenance, compact and huge gain of torque to volume ratio etc., the control of BLDC motor classified mainly of two types sensor scheme and sensor-less schemes. This paper presents simulation and analysis of two control schemes for BLDC motor drive for air cooling system. The BLDC drive system was developed in MATLAB for both sensor and sensor-less schemes and simulated for different loading conditions.

Ketersediaan Peralatan Listrik Bercatu Daya DC Untuk Mendukung Pemanfaatan PLTS Tanpa Inverter Pada Rumah Tangga Urban

Solar photovoltaic is one solution to provide green and sustainable electricity. Currently, most of PV application requires inverter as the electrical appliances are mostly powered by AC voltage. The inverter is the most complex components in a solar PV system as it contains complex electronic circuitry and also expensive. One solution to eliminate the use of an inverter is DC house in which power is distributed in DC voltage. For the urban consumer, which uses a wide range of electrical appliances, DC house requires the availability of DC powered electrical appliances. However, information about the availability of DC powered equipment is still limited. This paper reviews the availability of DC powered electrical appliances to get insight into the current status of this device. This study conducted an online survey targetting popular e-commerce which sells electrical appliances. The study showed that almost all electrical equipment commonly installed in the urban house of Indonesia are now available as DC powered appliances.

Portable Energy Storage System for DC House and Emergency Response in Indinesia

Portable Energy Storage System for DC House and Emergency Response in Indinesia

LED-Lamp Design for Renewable Energy-Based DC House Application

<span lang="EN-US">This paper describes the design of an LED lamp to be used in a DC house being supplied using a renewable energy source or in a DC Smart Grid. LED lamps are widely known for its low-electricity consumption. The DC house application is becoming more and more popular due to its advantage of using DC generated electricity, for example from a solar photovoltaic system, directly without having to invert it into AC voltage. However, LED needs a driver to activate and control it. Its mounting also needs certain precaution to anticipate the high heat from the LED. An appropriate heatsink is required before activating the LED. The laboratory results indicate that a 3-watt LED bulb lamp can produce an efficiency up to 93.16% with luminous efficacy 82.29 lm/W. These results prove that an LED bulb consumes less energy and can give an optimal brightness.</span>

Implementation of talis and dc house system for rural areas in indonesia

In 2017, the aggregate electrification ratio in Indonesia has been achieving 92.8%. However, some rural areas such as in Maluku and Papua Islands still have low electrification ratio (~70%). One of the main problems in supplying electricity to rural areas in Indonesia is the geographical concern which consisted of islands leading to the difficulty of electricity grid development. In some areas, diesel power plant has been being built to supply the electricity. However, it causes another problem to transport the primary energy source to the targeted area which would increase the cost of electricity supply. Besides, it also needs investment cost to build transmission and distribution systems, as well as the maintenance expenses. To resolve this issue, a new scheme of battery-based Tabung Listrik or TaLis (DC-based power bank) and DC house system is proposed to be the solution to provide electricity to rural areas. The potential of local renewable energy sources such as biomass, hydro, wind, and solar could be utilized to be charging sources of batteries (TaLis). This study presents the TaLis prototype, DC house installation, supply chain process and charging scheme of TaLis, and cost comparison between the proposed system with other existing power systems such as communal PV farm and diesel power plant. We found that TaLis and DC house system provided the least cost of electricity production compared to other power systems, i.e. $0.88/kWh for TaLis and DC house system, $1.65/kWh for diesel power plant, and $1.47/kWh for communal PV farm. Implementation of this approach is expected to improve the welfare and quality of life of rural communities immediately.