Design, Construction and Preliminary Test Operation of BPPT-3MW Condensing Turbine Geothermal Power Plant

This paper reports the conceptual design of a household kitchen food waste composter. Several conceptual approaches, such as Quality Function Deployment (QFD), Concept Generation, and Concept of Evaluation using PUGH Method are implemented. The component selection is applied using House of Quality method, and the final design is presented and selected using PUGH Method. Design 1 is selected as the best composter design. The material selection and the cost of the components are also presented. The conceptual design approach highlights its benefit as the preliminary method in designing the food waste composter.

Section: Methodsmentioning

confidence: 99%

A Preliminary Conceptual Design Approach of Food Waste Composter Design

Angie¹,

Tokit²,

Rahman³

et al. 2021

“…Global warming, fossil fuel depletion, and excessive CO2 emission have urged the development of green alternative power sources such as wind, solar, geothermal energy, etc [1][2][3][4] . Another direction to tackle the energy crisis is improving the efficiency of power usage through waste-heat recovery.…”

Section: Introductionmentioning

confidence: 99%

Rapid Synthesis of W_18O_49 via Reactive Spark Plasma Sintering with Controlled Anisotropic Thermoelectric Properties

Tran¹,

Ohtaki²,

Suekuni³

2021

Single phase W18O49 sintered polycrystalline samples were successfully synthesized via one-step rapid reactive spark plasma sintering directly from commercially purchased WO3 and WO2 powders. Thermoelectric properties of the samples sintered at 15 and 30 MPa showed insignificant anisotropy, while a strong anisotropy was observed for the sample sintered at 50 MPa. The in-situ reaction under a high applied pressure allowed a preferential grain growth along the direction perpendicular to the pressure axis. The high anisotropy of the sample sintered at 50 MPa yielded the lowest thermal conductivity of 4 Wm −1 K −1 , resulting in a ZT value of 0.08 at 1073 K. This study offers the rapid and cost-effective preparation method for W18O49 materials, which can also be applied for other tungsten suboxide phases, with partially controlled anisotropic properties by the influence of applied pressure for thermoelectric performance enhancement.

“…Indonesia has an abundance of geothermal energy sources, which are spread along a volcanic path on the "Ring of fire" [1][2] . Increasing threat posed by global warming and climate change has drawn the attention of global researchers and decision makers to renewable energy, contextually geothermal energy, as potential remedy 3) .…”

Section: Introductionmentioning

confidence: 99%

Variation of Rock Electrical Resistivity in Andesitic-Trachytic Volcanic Geothermal Areas. A Case Study of Lili-Sepporaki, Sulawesi island- Indonesia

Mutebi¹,

Nur²,

Haryanto³

et al. 2020

The objective of this paper is to investigate how electrical resistivity changes as electromagnetic waves penetrate deep into the subsurface of Lili-Sepporaki geothermal prospect, using Magnetotelluric data. Lili Sepporaki is an andesitic-trachytic volcanic-rich area located in western Sulawesi-Indonesia. Magnetotelluric data was processed using SSMT2000 and MTEditor software programmes. Results show that resistivity of rocks generally increases with decreasing frequency, that is; less than 100 Ohm-m for frequencies greater than 100 Hertz; and fluctuates between 100-1000 Ohm-m for frequency range 1-0.1 Hertz. Resistivity also increases with depth of penetration of electromagnetic waves. Weathering, hydrothermal alteration, and many times fluids increase the conductivity of rocks. A low resistivity anomaly is seen around the hot spring, northwards. Presence of fluids in an intensively fractured volcanic rock lowers its resistivity. In the future, another Magnetotelluric sounding should be carried with much more measurement stations followed by a three-dimensions interpretation.