Fixed unconsistent use of acronyms
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7 changed files with 49 additions and 47 deletions
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@ -378,7 +378,7 @@ The unit has a typical \acrlong{eer} (\acrshort{eer}, cooling efficiency) of 4.9
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maximum cooling capacity of 64.2 kW.
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One particularity of this \acrshort{hvac} unit is that during summer, only one
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of the two compressors are running. This results in a higher \acrlong{eer}, in
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of the two compressors are running. This results in a higher \acrshort{eer}, in
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the cases where the full cooling capacity is not required.
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\subsubsection*{Ventilation}
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@ -504,7 +504,7 @@ it will oscillate between using one or two compressors. Lastly, it is possible
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to notice that the \acrshort{hvac} is not turned on during the night, with the
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exception of the external fan, which continues running.
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\subsubsection{The CARNOT WDB weather data format}\label{sec:CARNOT_WDB}
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\subsubsection{The CARNOT Weather Data Bus format}\label{sec:CARNOT_WDB}
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For a correct simulation of the building behaviour, CARNOT requires not only the
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detailed definition of the building blocks/nodes, but also a very detailed set
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@ -514,7 +514,7 @@ sun's position throughout the simulation (zenith and azimuth angles), the
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as well as information on the ambient temperature, humidity, precipitation,
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pressure, wind speed and direction, etc. A detailed overview of each
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measurement necessary for a simulation is given in the CARNOT user
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manual~\cite{CARNOTManual}.
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manual~\cite{CARNOTManual}. This data structure is known as the \acrfull{wdb}.
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In order to compare the CARNOT model's performance to that of the real \pdome,
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it is necessary to simulate the CARNOT model under the same set of conditions as
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@ -532,17 +532,19 @@ are computed using the Python pvlib
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library~\cite{f.holmgrenPvlibPythonPython2018}.
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As opposed to the solar angles, which can be computed exactly from the available
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information, the Solar Radiation Components (DHI and DNI) have to be estimated
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from the available measurements of GHI, zenith angles (Z) and datetime
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information. \textcite{erbsEstimationDiffuseRadiation1982} present an empirical
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relationship between GHI and the diffuse fraction DF and the ratio of GHI to
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extraterrestrial irradiance $K_t$, known as the Erbs model. The DF is then used
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to compute DHI and DNI as follows:
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information, the Solar Radiation Components (\acrshort{dhi} and \acrshort{dni})
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have to be estimated from the available measurements of \acrfull{ghi}, zenith
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angles (Z) and datetime information.
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\textcite{erbsEstimationDiffuseRadiation1982} present an empirical relationship
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between \acrshort{ghi} and the \acrfull{df} and the ratio of \acrshort{ghi} to
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extraterrestrial irradiance $K_t$, known as the Erbs model. The \acrshort{df}
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is then used to compute \acrshort{dhi} and \acrshort{dni} as follows:
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\begin{equation}
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\begin{aligned}
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\text{DHI} &= \text{DF} \times \text{GHI} \\
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\text{DNI} &= \frac{\text{GHI} - \text{DHI}}{\cos{\text{Z}}}
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\text{\acrshort{dhi}} &= \text{DF} \times \text{\acrshort{ghi}} \\
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\text{\acrshort{dni}} &= \frac{\text{\acrshort{ghi}} -
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\text{\acrshort{dhi}}}{\cos{\text{Z}}}
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\end{aligned}
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\end{equation}
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