On Determination of Current and Voltage Vectors in the Distribution Network According to AIMS EMA

Accent is on determination of appropriate friction factor, and on selection of representative equation for natural gas flow under presented conditions in the network. Calculation of presented looped gas-pipeline network is done according to principles of Hardy Cross method. The final flows were calculated, for known pipes diameters and nodes consumptions while the flow velocities through pipes have to stand below certain values. In optimization problem flows are treated as constant, while the diameters are variables.

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Incidence of irradiated foods in the distribution network of Prague

Czech Journal of Food Sciences ◽

10.17221/3427-cjfs ◽

2011 ◽

Vol 22 (No. 6) ◽

pp. 222-229

Author(s):

I. Bohačenko ◽

Z. Kopicová ◽

I. Zámečníková

Keyword(s):

Gas Chromatography ◽

Electrochemical Detection ◽

Distribution Network ◽

Ministry Of Health ◽

Irradiated Foods ◽

Rabbit Meat ◽

Exotic Fruits

The samples, 29 in total, of poultry, rabbit meat, cheese and exotic fruits were taken from the distribution network of Prague. None of the samples was declared as irradiated according to the Decree of the Ministry of Health, CR, No. 133/2004 Sb. The check of their possible exposure to irradiation was made by means of two methods, i.e. the procedure according to EN 1784 (determination of hydrocarbons generated by irradiation using gas chromatography) and the determination of non-bonded o-tyrosine by means of HPLC with electrochemical detection. Neither method brought evidence for the exposure to irradiation, i.e. the purchased foodstuffs concerned were not labelled deceitfully.    

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Determination of Neutral Point in Water Distribution Network Pipes with Variable Discharge on Route

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.909.428 ◽

2014 ◽

Vol 909 ◽

pp. 428-432 ◽

Cited By ~ 2

Author(s):

Ioan Sarbu ◽

Gabriel Ostafe

Keyword(s):

Water Supply ◽

Distribution System ◽

Water Distribution ◽

Distribution Network ◽

Water Distribution Network ◽

Distribution Networks ◽

Neutral Point ◽

Water Supply Systems ◽

Proposed Model

Distribution networks are an essential part of all water supply systems. Distribution system costs within any water supply scheme may be equal to or greater than 60% of the entire cost of the project. The reliability of supply is much greater in the case of looped networks. The pipe networks have concentrated outflows or uniform outflow along the length of each pipe. In some pipes with variable discharge of a looped distribution network, water velocity could be reversed between its extremities. Thus, it is a water stall point denominated neutral point in which the discharge is null. In this paper a mathematical model for the determination of water stall point location in the pipes with distributed consumption is developed. This model has been implemented in a computer program for PC microsystems. Numerical example will be presented to demonstrate the accuracy and efficiency of the proposed model.

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