| 1. |
- Delsing, Jerker
(author)
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Fluid composition monitor using electrode pair
- 1987
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Patent (pop. science, debate, etc.)abstract
- The measurement body comprises two concentric metal tubes, one inner and one outer (3), sepd. by a distance component of electrically insulating material. The two tubes are connected by leads to a vector impedance meter for measuring phase angle. The body is fitted in a section of a tube in which the fluid to be monitored is transported, or, alternatively, inside a tube or tank in which the fluid is stored. The fluid fills the space inside the inner tube and that between it and the outer tube. The ends of the inner tube may be blocked so that only the space between the two tubes is filled with fluid. Thus, a capacitor is formed by the measurement body, and the two tubes constitute its electrodes. When monitoring the compsn. of a fluid, a known high frequency alternating voltage is fed over the two electrodes, and the phase angle between the voltage and the resultant current is measured, it being preferable for the frequency of the voltage or current ot be in the interval of 250 kHz.
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| 2. |
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| 3. |
- Engstrand, Per, 1955-, et al.
(author)
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Method of reducing the energy consumption at the refining of cellulose containing material [Sätt att reducera energikonsumtionen vid raffinering av cellulosahaltigt material]
- 1987
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Patent (pop. science, debate, etc.)abstract
- Method of reducing the energy consumption at the refining/beating of cellulose-containing material by the addition of alkali to the material for neutralizing acid groups bonded to the fibre wall. According to the invention, the pH-value in the pulp suspension is measured at the refiner outlet, the alkali is added in an amount depending on the measured pH value for neutralization without excess in the beating zone or immediately before the material enters the same, in an amount of 0.05-9 kg/ton, preferably 0.5-5 kg/ton, suitably 1-4 kg/ton, calculated as NaOH.
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| 4. |
- Granryd, Eric, et al.
(author)
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Värmeväxlarvägg anordnad med en tunn, hålförsedd metallfolie för att förbättra värmeövergången vid kokning respektive kondensation : [Heat transfer element]
- 1986
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Patent (pop. science, debate, etc.)abstract
- A heat exchanger wall incorporates a partition wall (11-12), one side of which is in contact with a heat exchange medium. A mechanically stable part (11) of the partition wall (11-12) has provided on one surface thereof a thin metal foil (12), which is provided with a large number of small through-passing holes (121) and which is attached directly to the said part (11), such as to form a minute gap (13) between the foil and the mechanically stable part. According to one embodiment the element comprises a tube (11) and the foil has provided therein a longitudinally extending slot (122) and/or a plurality of folds or bends (31, 32) directed towards the stable part (11), and/or a fold or bend (51) facing away from the stable part (11). In addition to occurring through the intrinsic rigidity of the foil, the thin gap is formed by providing one side of the foil (12) with a rough or irregular structure, or by forming the holes in the foil in a manner such as to leave burrs around the defining edges of the holes, or by providing in the foil a number of folds or bends (31, 32) which face towards the mechanically stable part.
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| 5. |
- Hermansson, Leif, et al.
(author)
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Method for the manufacture of an object of a powdered material by isostatic pressing
- 1988
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Patent (pop. science, debate, etc.)abstract
- In the manufacture of an object of a powdered material by isostatic pressing of a body (10) preformed from the powdered material with a gaseous pressure medium, the preformed body is provided with a casing (13) of glass which is made gas-impenetrable by heating before carrying out the isostatic...
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