Richard de Neufville's TPP SM Thesis Manual - Title Page - MIT

Exhibit 8.1: The Table to be revised by the recommended procedureTable XYZ: Single System Analysis—Heat Flow SummaryCollector Sub-systemCollector Output1420.87 MWHPipe Loss Forward17.13 MWHPipe Loss Return20.38 MWHCollector SupplyStorage Sub-SystemStorage Loses378.89 MWHCollector Supply - storage lossesStored Heat Year End - Year-20.23 MWHBeginningCollector and Storage SupplyAuxiliaryAuxiliary Pump Electric Energy0.00 MWHAuxiliary Heater1203.94 MWHTotal SupplyLoadDist. Loss Forward34.73 MWHDist. Loss Return26.59 MWHHouse load2167.22 MWHTotal LoadRatiosCollector Supply/Total Load62.07 percentCollector Supply Minus StorageLosses/Total Load45.07 percentCollector and Storage Supply/Total Load 45.98 percent1383.36 MWH1004.47 MWH1024.70 MWH2228.64 MWH2228.64 MWHDetermine the point of the illustration: The Table in Exhibit 8.1 contains whatseem to be two different kinds of material: some accounting of energy, and a setof ratios. it is not clear how these data relate to each other. For the sake of theexample, let us simply agree that the point of the illustration is to show the readerthe relative importance of the elements that constitute the energy balance ofsome solar energy system.Eliminate Extraneous Material: Much of the material in Exhibit 8.1 is clearlyunnecessary for the point to be made. All those repetitions of “MWH” can go, forinstance; there must be a simpler way to show this. Likewise, all those decimalpoints are meaningless.Additional material can also be discarded, once we recognize the nature of thedata. It refers to measurements of a solar energy system. Measurements onsuch devices are unlikely to be accurate down to 1%. Consequently, any entry inthe Table within that range can surely be taken out, as being within the level oferror of the system.Thesis Definition and Preparation -- Richard de Neufville 48