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NOVA Chemicals Corporation is a plastics and chemical company headquartered in Calgary, Alberta, with Executive Offices in the Pittsburgh suburb of Moon Township, Pennsylvania and Lambton County, Ontario. It was founded in 1954 as Alberta Gas Trunk Lines and was later renamed to NOVA Corporation. In 1998 it merged with TransCanada Pipelines Limited. On July 6, 2009, IPIC, which is wholly owned by the government of the Emirate of Abu Dhabi, completed the 100% purchase of Nova Chemicals, and transferred its place of incorporation to the Province of New Brunswick.NOVA Chemicals' products are used in a wide variety of applications, including food and electronics packaging, industrial materials, appliances and a variety of consumer goods. The Company operates two business units and holds a 50% interest in a major joint venture with INEOS Group Limited , called INEOS NOVA. NOVA Chemicals' business units are: Wikipedia.


Botros K.K.,Nova Chemicals Corporation
Journal of Loss Prevention in the Process Industries | Year: 2015

Shell-tube type heat exchangers are often used to exchange heat between a high-pressure fluid and a low-pressure fluid, and the pressure difference between the two fluids could be significantly high. If the difference in the design pressure between the low-pressure (LP) and high-pressure sides is greater than that covered by American Petroleum Institute (API 520 and 521) 10/13th rule, dynamic analysis is required to ascertain that the maximum surge pressure that could be reached does not compromise the integrity of the LP side of the exchanger. API guidelines also notes that attention should also be given not only to the shell-side of the heat exchanger under evaluation, but also to the "upstream and downstream systems" This paper offers further insight into the importance of including the surrounding piping systems around the subject heat-exchanger where a tube-rupture scenario is considered, and also directs attention to the importance of correctly specifying the appropriate boundary conditions (B.C.) at the far ends of both the upstream and downstream piping systems. It demonstrates the effects of specifying different B.C. on the maximum pressure surge via a case study of a hot separator vapour condenser in a bitumen hydrotreating unit, where the process fluid on the tube-side is a vapour-liquid mixture at 9660kPa(g). The vapour mass fraction of the process fluid is approximately 0.5, and is mostly hydrogen. The fluid on the LP side is cooling water connected to the plant supply and return cooling systems as well as another adjacent low pressure condenser. The design pressure for the cooling water piping system and the adjacent condenser is 1380kPa(g). © 2015 Elsevier Ltd. Source


Botros K.K.,Nova Chemicals Corporation
Journal of Engineering for Gas Turbines and Power | Year: 2011

Nozzle type check valves are often employed in compressor stations in three locations: compressor outlet, station discharge, and station bypass. The fundamental design concept of these valves is based on creating a converging diverging flow through the valve internal geometry such that a minimum area is achieved at a location corresponding to the back of the check valve disk at the fully open position. This will ensure maximum hydrodynamic force coefficient which allows the valve to be fully open with minimum flow. Spring forces and stiffness determine the performance of this type of check valves and impact the overall operation and integrity of the compressor station. This paper examines the effects of various spring characteristics and stiffness in relation to the compressor and station flow characteristics. The results show that when the spring forces are higher than the maximum hydrodynamic force at minimum flow, the disk will not be at the fully open position, which will give rise to disk fluttering and potential for cyclic high velocity impact between components of the internal valve assembly. This could lead to self destruction of the check valve and subsequent risk of damage to the compressor unit itself. The paper also points to the fact that the spring selection criteria for a unit check valve are different than that for station and bypass check valves. An example of a case study with actual field data from a high pressure ratio compressor station employing this type of check valves is presented to illustrate the associated dynamic phenomena and fluid-structure interaction within the internal assembly of the check valve. © 2011 American Society of Mechanical Engineers. Source


The relationships between the sand grain roughness height (ks) in use with Nikuradse or Colebrook correlations for the roughness function (RF) and the internal pipe wall roughness element described by the root-mean-square (RMS) of the roughness profile (Rq) for turbulent flow in pipes are experimentally examined. Flow tests were conducted on a total of 13 commercial steel pipes of two sizes: 168.3 mm and 114.3 mm outer diameter (OD). The aim was to provide further insight into relationship between ks and Rq, for use with either RF correlations. The tests were conducted on high-pressure pipeline quality natural gas in the range of Reynolds number (based on pipe internal diameter) of 9 × 106-16 × 106. For commercial carbon steel pipes, the relationship between ks and Rq was found in the form ks=1.306Rq+0.078Rq2 and ks=2.294Rq (both ks and Rq in μm), for use with Colebrook and Nikuradse RF correlations, respectively. These correlations cover a wide range of Rq from 2.7 μm to 12.5 μm which is typically found in commercial carbon steel pipes. For stainless steel (SS) pipes, preliminary results indicate that other surface roughness profile parameters need to be employed to better define the values of ks for these types of commercial steel pipes. © Copyright VC 2016 by ASME. Source


Patent
Nova Chemicals Corporation | Date: 2010-02-18

A patient monitoring system including a sensing-recording device that attaches to a patient and a probe utilized by attending personnel at a trauma site. After an initial interaction between the probe and the sensing-recording device, the sensing-recording device samples one or more physiological parameters and stores time stamped readings in a first memory. The probe is adapted to take other measurements, download the data from the first memory of the sensing-recording device, manipulate the collective data and return data to a second memory in the sensing-recording device. The sensing-recording device continues to accumulate data in the first memory during transport of the patient from a trauma site to a medical facility.


Patent
Nova Chemicals Corporation | Date: 2013-07-17

A patient monitoring system including a sensing-recording device that attaches to a patient and a probe utilized by attending personnel at a trauma site. After an initial interaction between the probe and the sensing-recording device, the sensing-recording device samples one or more physiological parameters and stores time stamped readings in a first memory. The probe is adapted to take other measurements, download the data from the first memory of the sensing-recording device, manipulate the collective data and return data to a second memory in the sensing-recording device. The sensing-recording device continues to accumulate data in the first memory during transport of the patient from a trauma site to a medical facility.

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