Life cycle cost analysis (LCCA) of Stirling-cycle-based heat pumps vs. conventional boilers

Heat pumps (HPs) which use low temperature (waste) heat and renewable energy sources to provide high temperature heat are widely regarded as a critical technology for reducing carbon dioxide emissions in the industrial sector. The HighLift technology considered here can provide high temperature output heat up to around 200 °C. This article...

Negative Emission Power Plants: Techno-economic analysis of a biomass-based integrated gasification solid oxide fuel cell/gas turbine system for power, heat, and biochar co-production - Part 2

In our previous work (Part I), we evaluated the thermodynamic models of the biomass-fed integrated gasification solid oxide fuel cell system with a carbon capture and storage (BIGFC/CCS) unit. In this work (Part II), the techno-economic analysis of the proposed negative emission power plants is carried out. Levelized cost of electricity, net...

Interference between geothermal doublets across a fault under subsurface uncertainty: Implications for field development and regulation

Direct Use Geothermal Systems (DUGS) are increasing their installed capacity worldwide and denser developments with multiple doublets are becoming more common. Interference between doublets therefore becomes an additional concern to subsurface uncertainties. Faults can be either barriers or conduits to flow and can affect the fluid pathways...

The fault plane as the main fluid pathway: Geothermal field development options under subsurface and operational uncertainty

Geothermal energy is gaining momentum as a renewable energy source. Reservoir simulation studies are often used to understand the underlying physics interactions and support decision making. Uncertainty related to geothermal systems can be substantial for subsurface and operational parameters and their interaction with regards to the output...

Economic and fault stability analysis of geothermal field development in direct-use hydrothermal reservoirs

The installed capacity of geothermal systems for direct use of heat is increasing worldwide. As their number and density is increasing, the their interaction with subsurface faults becomes more important as they could lead to safety risks from induced seismicity. Assessment and management of such risks is essential for the further development...

Interdependencies between physical, design and operational parameters for direct use geothermal heat in faulted hydrothermal reservoirs

Interest in direct use geothermal systems is increasing due to their ability to supply renewable, environmentally friendly heat. Such systems are mostly developed in conduction dominated geological settings where faults are often encountered. Interdependencies between physical, design and operational parameters make it difficult to assess the...

Investigation of the synergy potential of oil and geothermal energy from a fluvial oil reservoir

Geothermal projects, as renewable energy projects, are not economically attractive in most places of the world at the current state of development; for this reason, subsidies are required by energy and environmental authorities in order to increase the interest in such projects. In this paper, we assess and model strategies for integration of...

Monohull versus Semi-submersible for offshore heavy lift crane operations

In this thesis the differences between the monohull and semi-submersible are investigated. For a general heavy lift crane operation and its operational profile, the difference is performance and total cost are calculated. These are used to determine the turning point, the point where the semi-submersible is more favourable for a heavy lift crane...

Analysis of feed-in tariff policies for solar photovoltaic in China 2011–2016

In 2011 China initiated policies to promote the adoption of solar photovoltaic (PV) using feed-in tariff (FIT) policies. Since then the PV domestic market expanded substantially. In the past six years, the FIT policies were updated (adjustment of tariff levels, division of three FIT regions, setting of installation quotas) to address emerging...

Study on the Impact of Trolley Assisted Haul Trucks on Strategic Mine Planning in Open Pit Mines

Trolley assist is a system in which haul trucks in open pit mines are propelled by electric energy along a designated haul road segment. This can lead to high savings on fuel costs, productivity, CO2 emission and engine life, but is associated with limitations on mine planning. The purpose of this thesis is to determine how trolley assist can be...

An extension of the Zandvliet-Handels-van Essen-Brouwer-Jansen Pseudo-well-based method for automatic well placement

Oil production optimization is one of the main concerns of the reservoir management. In this regard, optimal location of wells can lead to a significant increase in the oil production. The purpose of this research is to investigate a new extension of the automatic well-placement optimization technique maximizing the net present value (NPV) of...

The effect of asphalt maintenance regimes on inflation correction in Dutch DBFM contracts

Inflation is a worldwide phenomenon that influences future investment decisions. Inflation is the devaluation of money, causing a reduction of purchasing power and price level rise. Nobody knows how high inflation will be, and thus price levels in the future a uncertain. In long-term projects with expenses in the future, it is important to take...

Feasibility, beneficiality, and institutional compatibility of a micro-CHP virtual power plant in the Netherlands

Dutch households are responsible for a significant part of the total Dutch energy consumption and CO2 emissions. One option for decreasing household energy consumption and CO2 emissions is to deploy micro-combined-heat-power (?CHP) units. A micro-CHP virtual power plant (VPP) is a cluster of grid connected ?CHP units that is monitored and...