{"id":853,"date":"2024-10-09T15:47:00","date_gmt":"2024-10-09T19:47:00","guid":{"rendered":"https:\/\/www.aquacure-jeffro-dev.linksdev.com\/?post_type=product-resource&p=853"},"modified":"2024-10-10T15:26:51","modified_gmt":"2024-10-10T19:26:51","slug":"q-what-is-mmw","status":"publish","type":"product-resource","link":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/product-resource\/q-what-is-mmw\/","title":{"rendered":"R ~ \u00bfQu\u00e9 es MMW?"},"content":{"rendered":"

MMW is an acronym for MilliLiter(s) per Minute per Watt.
\nMMW is meant to measure the efficiency of any given electrolyzer technology; particularly electrolyzers designed for on-board vehicle use. The idea is to know the relationship of the volume of BG being produced (milli-liters) for each watt-minute of work (volume of electrical energy).
\nMMW came into the public domain (I haven\u2019t tracked down the originator) during the explosion of on-board electrolyzer experimentation that happened during 2008. The originator popularized the measurement even though there was already (for decades) an electrolyzer efficiency standard in place and accepted worldwide by the scientific community.
\nThe \u2018official\u2019 standard for electrolyzer efficiency is Watt-hour(s) per Liter (Wh\/L). Watt-hours are a measurement of work, so this measurement gives the actual amount of electrical energy it took to make 1 liter of BG.
\nSo, an on-board electrolyzer (like the Mighty Mite version of the HyZor technology) that measures 30 seconds to fill a 1,000 mL volume, using a steady 13.8 VDC and 8.5 ADC would calculate:
\nGiven:
\n13.8 VDC * 8.5 ADC = 117.3 watts30 seconds to fill 1,000 mL = 120 liters\/hr117.3 watts * 1 hr = 117.3 Wh
\nResults:
\n117.3 Wh \/ 120 L\/hr = 0.9775 Wh\/L (for Wh\/L smaller is better)
\n2000 mL \/ 1 minute \/ 117.3 watts = 17.05 MMW (for MMW larger is better)
\nHere are some\u00a0very good MMW spreadsheets you can download so you can know the efficiency of your experiments (click) (click).Here\u2019s a nice simple online MMW calculator (click).
\nThe key factor you need to consider is properly taking measurements to assure an accurate result.
\nFor \u2018pretty good\u2019 at home testing, we start with making a gas Volume Testing Apparatus (click)
\nMy testing protocol is:1. Get the electrolyzer producing gas under the conditions that it will be tested (pressure, temperature, etc.) \u00a0You want \u2018steady state\u2019 conditions.
\n2. Note the amperage and the voltage at the time of the test.
\n3. Switch the output of the electrolyzer to the VTA; starting a stopwatch at that same instant.
\n4. Watch the volume markings on the VTA and stop the stopwatch at a chosen volume.
\nNow I have amperage, voltage, volume and time. \u00a0Simply calculate for Wh\/L and\/or MMW.Here\u2019s a nice simple online MMW calculator (click).
\nNOTE: For highest accuracy make sure the liquid level inside the bottle is even with the liquid level outside the bottle.
\nThis VTA only works when testing at \u2018steady state\u2019 pressure, because if the electrolyzer loses pressure as it is tested, you\u2019ll get a false volume as the \u2018stored\u2019 gas expands to ambient pressure. \u00a0Most people simply get the electrolyzer operating with the BG outputting to atmosphere and then plug the electrolyzer output into the VTA when starting the stopwatch.My VTA is slightly different than most in that I counterbalance the weight of the testing bottle. \u00a0When measuring without counterbalance, I lift the bottle to keep the liquid level inside the bottle even with the liquid on the outside of the bottle. \u00a0This VTA does a pretty good job of keeping the liquid levels even, so your volume measurement will be accurate. I use this apparatus because I\u2019m often testing by myself and I don\u2019t have three hands :)It\u2019s also important to note that the temperature of the water and any impurities in the water can affect the \u2018reading\u2019. \u00a0I use pure water at ambient temperature (about 70\u00b0F). \u00a0If my electrolyzer is hot, I bubble the output gas through water to bring it\u2019s temperature to around 70\u00b0F. \u00a0This eliminates inaccuracies that would be caused by steam volume in the output gas.
\nFor absolute accuracy (not generally needed unless comparing results to other electrolyzers) the ambient air pressure needs to be factored in, to correct the gas volume to US-STP.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product-resource-group":[99,100,101,107],"restricted-resource-tag":[],"class_list":["post-853","product-resource","type-product-resource","status-publish","hentry","product-resource-group-er50-resources","product-resource-group-browns-gas-book-1-resources","product-resource-group-browns-gas-book-2-resources","product-resource-group-hyzor-resources"],"acf":[],"_links":{"self":[{"href":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/wp-json\/wp\/v2\/product-resource\/853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/wp-json\/wp\/v2\/product-resource"}],"about":[{"href":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/wp-json\/wp\/v2\/types\/product-resource"}],"wp:attachment":[{"href":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/wp-json\/wp\/v2\/media?parent=853"}],"wp:term":[{"taxonomy":"product-resource-group","embeddable":true,"href":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/wp-json\/wp\/v2\/product-resource-group?post=853"},{"taxonomy":"restricted-resource-tag","embeddable":true,"href":"https:\/\/aquacure-jeffro-dev.linksdev.com\/es\/wp-json\/wp\/v2\/restricted-resource-tag?post=853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}