m % wb
English translation: mass percentage wet based
| 00:22 Dec 13, 2011 |
| Dutch to English translations [PRO] Tech/Engineering - Engineering: Industrial / Biomass fuel specification | |||||||
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|  Selected response from: Barend van Zadelhoff Netherlands Local time: 10:27 | ||||||
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| Summary of answers provided | ||||
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| 3 | wet-bulb/dry-bulb (temperature) |
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| 3 | mass percentage wet based |
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Answers
6 hrs confidence: 
wet-bulb/dry-bulb (temperature) Explanation: Now that you gave more references, I think this is what you need Reference: http://en.wikipedia.org/wiki/Wet-bulb_temperature |
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11 hrs confidence:
mass percentage wet based Explanation: Hi T. Thank you. I am glad I ended up at the right answers: your confirmation is indispensable. The Dutch context does not offer much to go by and verify. I was also lucky to end up where I ended up, because my starting point and and the next point were wrong! Fortunately, 'wet based' and 'dry based' remained loyal to me to the very end. :-) I hope you will take care of the details. I am not sure what is the best notation for 'mass percentage' in English. I come across various options: ww, ww%, mm, mm%, mass % 'wet based' is probably best abbreviated as 'w.b.' rather than 'wb', but, as I said, I would like to leave this up to you to decide. |
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Reference comments
42 mins |
| Reference Reference information: Alle gegevens volgens Eurovent condities: water: 40ºC / 45°C - omgevingslucht 7°C DB / 6°C WB. (WB = natte bol, DB = droge bol.) wet based/ dry based ? http://webmanuals.lennoxeurope.com/Current Products/Chillers... Wet Based vs Dry Boilers. http://www.doityourself.com/forum/boilers-home-heating-steam... -------------------------------------------------- Note added at 53 mins (2011-12-13 01:16:29 GMT) -------------------------------------------------- The two boilers most seen in residential use are made from cast iron or steel. And are either wet based (fire chamber surrounded by water), or dry based (boiler sits on top of the fire chamber). The boiler is a sealed pressure vessel which circulates hot water from the boiler through the header pipe, past the flow vale or zone valve, then through the baseboard / radiators and back into the boiler with the help of a circulator pump to be reheated. http://www.oocities.org/gpoilfire/Basicboiler.htm -------------------------------------------------- Note added at 1 hr (2011-12-13 01:25:51 GMT) -------------------------------------------------- Modelling biomass CHP, whilst taking into account the nonlinear and complex nature of the biomass combustion process and boiler-turbine is difficult and complex. To deal with this problem some kind of linearization is necessary. A large number of models such as models based on basic energy, mass and volume balance relations that uses physical system parameters [11][12][13], and simplified low order models based on the assumptions and constants of the system are available for dynamic studies of thermal based technologies. In this paper, development of a simplified non-linear dynamic model of direct combustion biomass CHP is presented. The characteristics of biomass CHPs and fuel types that can be used are given in Table.1 and Table.2. Fig.1 shows a schematic diagram of the Biomass CHP unit used. NCV= net calorific value in Mg/kg fuel wet based (w.b.) GCV is the gross calorific value in MJ/Kg fuel dry based (d.b.), w is the moisture content of the fuel in weight percent wt% (d.b.) and h is the concentration of hydrogen in wt% (d.b.) (guiding value for woody biomass fuels: 6 wt % (d.b.) and for herbaceous biomass fuels: 5.5 wt% (d.b.)) . GCV or higher heating value of biomass which is usually in the range of 18-22 MJ/Kg (d.b) can be calculated reasonably by using the following empirical formula [9][15]. http://www.supergen-hidef.org/Publications/Documents/Papers/... -------------------------------------------------- Note added at 1 hr (2011-12-13 01:44:10 GMT) -------------------------------------------------- ignore the first reference the other ones may be help or may be not perhaps wt % is equivalent to m% I don't know -------------------------------------------------- Note added at 2 hrs (2011-12-13 02:23:33 GMT) -------------------------------------------------- Mass percentage Multiplying mass fraction by 100 gives the mass percentage, also referred to by the obsolete terms weight percent (wt%) or weight-weight percentage http://en.wikipedia.org/wiki/Mass_fraction_(chemistry) Massapercentage De massafractie wordt vaak als percentage weergegeven, en dan massa-percentage genoemd. De grootheid wordt aangeduid met %(m/m). Het massa-percentage wordt gevonden door de massafractie met 100 te vermenigvuldigen. http://nl.wikipedia.org/wiki/Massafractie massapercentage wet based (m% wb) massapercentage dry based (m% db) I have no idea |
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