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Posted By: SteamyTeaPosted By: renewablejohnYour making the classic error of starting with an annual fuel consumption and then trying to fulfill that consumption with a single fuel in this case woodHardly a classic error, just highlights the difficulty of a single fuel.Not really valid to use brought in waste as that has to come from somewhere and will have an associated land area connected to it.I hardly see how using garden waste in a composting toilet will reduce my energy usage to 5%, have I missed something?
Posted By: renewablejohnYour making the classic error of starting with an annual fuel consumption and then trying to fulfill that consumption with a single fuel in this case wood
Posted By: renewablejohnIn a well insulated home 90% of its energy needs can be obtained from a solar thermal oil application
Posted By: renewablejohnvacuum tubes so re-radiation is not such a significant problem
Posted By: renewablejohnwith reflectors to achieve higher temperatures which linked to a temperature controlled variable speed pump allows high temperature thermal oil input even on overcast days
Posted By: renewablejohnIn deep winter I am assuming at least one nice day per week
Posted By: renewablejohnThermal oil technology is moving fast in the commercial sector with bread ovens and laundry applications already well established. Based on the thermal oil bread oven technology if applied to the domestic market will result in cookers and hobs being heated directly with thermal oil in addition the instant steam facility will make the electric kettle redundant and instant steam pressure cookers will become the norm.
Posted By: SteamyTeaAll the 'oil' does is allow a higher temperature to be transferred (compared to water), not any more energy, that is governed by collector surface area and efficiency.
Posted By: SteamyTeaHaving studied the frequency of cloud cover, and slowly working my way though a years worth of curve matching to determine a baseline, all I can say is that with a mean of 14 Wh/m^2 of resource and a demand of 19 Wh/m^2, I am going to struggle, and that is before entropy losses.
Posted By: fostertomwell, how do you quantify that
Posted By: fostertomWill you be able to quantify the ratio of continuous collection time, to continuous non-collection time
Posted By: fostertomWhat's that about curve matching?
Posted By: fostertomDoes the foregoing have direct bearing on your demand of 19 vs supply of 14, or is that a separate parallel observation
Posted By: fostertomEntropy
Posted By: fostertomEntropy - great stuff - but how does that come into it. I'm sure it does, but give us a clue?
Posted By: fostertomAnd other things being equal, higher collection temp (transfer temp) means lower collection efficiency, hence less energy collected, albeit at higher (perhaps more useful for some purposes) temp.
Posted By: SteamyTeaPosted By: fostertomWill you be able to quantify the ratio of continuous collection time, to continuous non-collection timeDid that a year or two back, not that hard
Posted By: fostertomto that intermediate state where collection is dominated by shutdown/standing loss and by startup lag?
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