Time filter

Source Type

Tulsa, OK, United States

Hudgins D.,Business & Decision | Na J.,Linde Process Plants Inc.
Computational Economics | Year: 2016

This analysis explores robust designs for an applied macroeconomic discrete-time LQ tracking model with perfect state measurements. We develop a procedure that reframes the tracking problem as a regulator problem that is then used to simulate the deterministic, stochastic LQG, H-infinity, multiple-parameter minimax, and mixed stochastic/H-infinity control, for quarterly fiscal policy. We compare the results of the five different design structures within a closed-economy accelerator model using data for the United States for the period 1947–2012. When the consumption and investment tracking errors are more heavily emphasized, the H-infinity design renders the most aggressive fiscal policy, followed by the multiple-parameter minimax, mixed, LQG, and deterministic versions. When the control tracking errors are heavily weighted, the resulting fiscal policy is initially more aggressive under the multi-parameter specification than under the H-infinity and mixed designs. The results from both weighting schemes show that fiscal policy remains more aggressive under the robust designs than the deterministic model. The simulations show that the multi-parameter minimax and mixed designs provide a balancing compromise between the stochastic and robust methods when the worst-case concerns can be primarily limited to a subset of the state-space. © 2014, Springer Science+Business Media New York. Source

Key R.,Linde Process Plants Inc. | Bruentrup M.,Linde Group | Schwarz M.,Linde Group
IGT International Liquefied Natural Gas Conference Proceedings | Year: 2013

Driven by growing global natural gas reserves, favourable gas prices and stricter emission regulations LNG is beginning to substitute traditional oil-based fuels in marine or heavy vehicle engines, power generation and process industries. This emerging "Merchant LNG" market calls for decentralized small-to-mid scale LNG plants and is now growing beyond a niche market, attracting new players. The idea of StarLNG™ is to standardize and optimize a small-to-mid scale LNG plant based on a wide set of process variations. This "Process Toolbox" is designed to cover about 90% of real-life boundary conditions, with the following major benefits: • Safety as for World Scale LNG • Fast-track EPC time schedule • Reduction of Capex • Highly efficient process, easy to operate • Modularized units for pre-treatment, process and main pipe racks • Toolbox concept with many options StarLNG™ delivers a generic LNG plant design for a 200 tpd (net liquefaction capacity) base case and many alternatives, with pre-engineered documents including a 3D CAD-model for a fully modularized plant -combining superb safety, reliability, ease of operations and efficiency with competitive prices and shortest execution schedule. Source

Treite P.,Linde Group | Nuesslein U.,Linde Group | Jia Y.,Linde Process Plants Inc. | Klebaner A.,Linde Group | Theilacker J.,Fermi National Accelerator Laboratory
Physics Procedia | Year: 2015

The Fermilab Cryomodule Test Facility (CMTF) provides a test bed to measure the performance of superconducting radiofrequency (SRF) cryomodules (CM). These SRF components form the basic building blocks of future high intensity accelerators such as the International Linear Collider (ILC) and a Muon Collider. Linde Kryotechnik AG and Linde Cryogenics have designed, constructed and commissioned the superfluid helium refrigerator needed to support SRF component testing at the CMTF Facility. The hybrid refrigerator is designed to operate in a variety of modes and under a wide range of boundary conditions down to 1.8 Kelvin set by CM design. Special features of the refrigerator include the use of warm and cold compression and high efficiency turbo expanders.This paper gives an overview on the wide range of the challenging cooling requirements, the design, fabrication and the commissioning of the installed cryogenic system. © 2015 The Authors. Source

Linde Process Plants Inc. | Date: 2010-03-05

Heat exchangers.

The invention relates to an integrated process and apparatus for liquefaction of natural gas and recovery of natural gas liquids. In particular, the improved process and apparatus reduces the energy consumption of a Liquefied Natural Gas (LNG) unit by using a portion of the already cooled overhead vapor from a fractionation column from an NGL (natural gas liquefaction) unit to, depending upon composition, provide, for example, reflux for fractionation in the NGL unit and/or a cold feed for the LNG unit, or by cooling, within the NGL unit, a residue gas originating from a fractionation column of the NGL unit and using the resultant cooled residue gas to, depending upon composition, provide, for example, reflux/feed for fractionation in the NGL and/or a cold feed for the LNG unit, thereby reducing the energy consumption of the LNG unit and rendering the process more energy-efficient.

Discover hidden collaborations