This paper reanalysed the 255 sets of geothermal two-phase flow data of Freeston et al (1983). A new void fraction correlation is proposed in this paper. The new correlation is derived from the analysis of two-phase flow velocity distribution using the Seventh Power Law as: To predict the two-phase pressure drop, an equivalent pseudosingle-phase flow having the same boundary layer velocity dist...

The development of a numerical model and design for the innovative construction heat exchanger (HE) used in condensation hood (being part combi-steamer) are described this work. covers an air-steam flow, transfer, steam process. last two processes were implemented with use in-house introduced via User Defined Functions (UDF). As condensate volume is negligible compared to steam, proposed remove...

Optimal operation of site utility systems is becoming an increasingly important part of any successful business strategy as environmental, legislative and commercial pressures grow. A reliable steam model allows a clear understanding of the system and of any operational constraints. It can also be used to determine the true cost of improvement projects, relating any changes in steam demand back...

As a result of their unique heat recovery properties, Humidified Gas Turbine (HGT) cycles have the potential to deliver resource-effective energy to society. The Evaporative Gas Turbine (EvGT) Consortium in Sweden has been studying these types of cycles for nearly a decade, but now stands at a crossroads, with commercial demonstration remaining. This thesis binds together several key elements f...

â understanding the flow behaviour in a gas well is crucial for future production strategies, obtaining bottomhole conditions from wellhead production data, analyzing production data and estimating reservoir properties. in this work, the pressure profile and flow regime are studied on four wells of a multi-well, multi-layer gas-condensate reservoir, producing at high rate. the wells are deviate...

Based on a recently published theoretical model, in this work we experimentally studied the problem of gravity water drainage due to continuous steam injection into an elliptical porous chamber made glass beads and embedded metallic, quasi-2D, massive cold slab. This configuration mimics process condensation for given time period during growth stage steam-assisted (SAGD) process, method used re...

Acidified steam condensates that are enriched in SO4 but poor in Cl are found in the upper parts of many geothermal systems occurring in steep terrains. In this paper, we characterize the chemical evolution of these acid-sulfate fluids by combining mineral and fluid inclusion relationships from Karaha-Telaga Bodas with numerical simulations of water-rock interactions. These interactions were mo...

Experiments were conducted to measure condensation heat transfer of steam-ethanol mixtures on a horizontal smooth tube. Heat flux and vapor-to-surface temperature difference accurately measured over wide range mass concentration ethanol (0.001%, 0.005%, 0.01%, 0.025%, 0.05%, 0.1%, 0.5% 1.0%.) at atmospheric pressure. The present work extends earlier data Murase et al. (2007) Ali (2013) lower hi...