Changes between Version 5 and Version 6 of doc/app/indoorequ
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- Jul 31, 2019 12:50:01 PM (5 years ago)
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doc/app/indoorequ
v5 v6 32 32 }}} 33 33 34 To represent the opaque wall and transparent window areas in buildings, a window fraction for horizontal and vertical surfaces gives the ratio of window to wall at a single façade element. The sum of each elemental ratio gives the ratio of the entire building. The ratio of the window area ''x'',,win,hv,, is a parameter of the USM.\\34 To represent the opaque wall and transparent window areas in buildings, a window fraction for horizontal and vertical surfaces gives the ratio of window to wall at a single façade element. The sum of each elemental ratio gives the ratio of the entire building. The ratio of the window area ''x'',,win,hv,, is a parameter of the [wiki:doc/tec/usm USM].\\ 35 35 36 36 {{{ … … 71 71 }}} 72 72 73 The complete ground surface of a building involves every storey gets a ground surface. To represent this, a net floor area is calculated. The height of the storey ''h'',,storey,, is a parameter of USM.73 The complete ground surface of a building involves every storey gets a ground surface. To represent this, a net floor area is calculated. The height of the storey ''h'',,storey,, is a parameter of [wiki:doc/tec/usm USM]. 74 74 75 75 {{{ … … 88 88 \end{align*} 89 89 }}} 90 The ratio of effective area ''Λ'',,𝐴𝑇,, and the dynamic parameter of specific effective surface 𝑎 are parameters of the USM.\\90 The ratio of effective area ''Λ'',,𝐴𝑇,, and the dynamic parameter of specific effective surface 𝑎 are parameters of the [wiki:doc/tec/usm USM].\\ 91 91 92 92 = Model scheme = 93 94 The ICM is part of the [wiki:doc/app/indoorref DIN EN ISO 13790:2008] with simplfified dynamic hour-based procedure. 93 95 94 96 The ICM is based on an analytical solution of Fourier’s law considering a resistance model with five resistances ''R'' [K/W] and one heat capacity ''C'' [J/K] as seen in figure 2. … … 102 104 103 105 From a numerical perspective, this network consists of five reciprocal resistances ''H'' and one heat storage capacity ''C'':\\ 104 ''H'',,v,, is the heat transport by ventilation between surface-near exterior air ''ϑ'',,n,, and indoor air ''ϑ'',,i,,. It is calculated with,106 ''H'',,v,, is the heat transport by ventilation between surface-near exterior air from [wiki:doc/app/indoorref DIN EN ISO 13789]. ''ϑ'',,n,, and indoor air ''ϑ'',,i,,. It is calculated with, 105 107 106 108 {{{ … … 111 113 }}} 112 114 113 The volumetric heat capacity of air ''ρ'',,air,,⋅''c'',,p,, is assumed as 0.33⋅W h K^−1^ m^-3^. The schedule on-time ''Z'',,sched,, , the airflow time of occupancy ''c'',,ACH,high,, , the airflow time of no occupancy ''c'',,ACH,low,, and the efficiency of heat recovery in the ventilation ''η'',,v,, are parameters of the USM.\\115 The volumetric heat capacity of air ''ρ'',,air,,⋅''c'',,p,, is assumed as 0.33⋅W h K^−1^ m^-3^. The schedule on-time ''Z'',,sched,, , the airflow time of occupancy ''c'',,ACH,high,, , the airflow time of no occupancy ''c'',,ACH,low,, and the efficiency of heat recovery in the ventilation ''η'',,v,, are parameters of the [wiki:doc/tec/usm USM].\\ 114 116 115 117 ''H'',,t,is,, is the connective heat transfer between indoor air ''ϑ'',,i,, and interior surface ''ϑ'',,s,, considering all room-enclosing surfaces. … … 156 158 \end{align*} 157 159 }}} 158 The thickness ''𝑑'',,𝑙𝑎𝑦𝑒𝑟4,, and the thermal heat conductivity ''𝜆'',,𝑙𝑎𝑦𝑒𝑟4,, of the fourth layer are a parameter of USM.\\160 The thickness ''𝑑'',,𝑙𝑎𝑦𝑒𝑟4,, and the thermal heat conductivity ''𝜆'',,𝑙𝑎𝑦𝑒𝑟4,, of the fourth layer are a parameter of [wiki:doc/tec/usm USM].\\ 159 161 ''H'',,t,1,, , ''H'',,t,2,, and ''H'',,t,3,, are auxiliary variables for calculation of the heat transport. 160 162 … … 178 180 == Thermal load and temperature calculations\\ 179 181 180 The internal air load is calculated with the internal heat gains with respect of occupancy of the building. The schedule is a parameter of the USM.182 The internal air load is calculated with the internal heat gains with respect of occupancy of the building. The schedule is a parameter of the [wiki:doc/tec/usm USM]. 181 183 {{{ 182 184 #!Latex … … 185 187 \end{align*} 186 188 }}} 187 ''Φ'',,sol,, is the heat load from shortwave radiation through all windows in respect of automatic window shutters. At a value of 300 W m^-2^ shortwave radiation, the automatic window shutters are set as on. With activated the shutters the shading factor ''f'',,c,, of the sun protection take effect. The shading factor ''f'',,c,, and the g-value ''g'',,win,, are parameters of the USM.189 ''Φ'',,sol,, is the heat load from shortwave radiation through all windows in respect of automatic window shutters. At a value of 300 W m^-2^ shortwave radiation, the automatic window shutters are set as on. With activated the shutters the shading factor ''f'',,c,, of the sun protection take effect. The shading factor ''f'',,c,, and the g-value ''g'',,win,, are parameters of the [wiki:doc/tec/usm USM] based on [wiki:doc/app/indoorref DIN 4108-2]. 188 190 189 191 {{{ … … 215 217 \end{align*} 216 218 }}} 217 The fractions for wall/vegetation ''𝑥'',,𝑤𝑎𝑙𝑙,𝑣𝑒𝑔,, and window ''𝑥'',,𝑤𝑖𝑛,ℎ𝑣,, are parameters of the SURFACEMOD.218 The temperatures for of wall/vegetation ''𝜗'',,𝑤𝑎𝑙𝑙,𝑣𝑒𝑔,, and for windows ''𝜗'',,𝑤𝑖𝑛,, are parameters of USM.\\219 The fractions for wall/vegetation ''𝑥'',,𝑤𝑎𝑙𝑙,𝑣𝑒𝑔,, and window ''𝑥'',,𝑤𝑖𝑛,ℎ𝑣,, are parameters of the [wiki:doc/tec/lsm Land surface model (LSM)]. 220 The temperatures for of wall/vegetation ''𝜗'',,𝑤𝑎𝑙𝑙,𝑣𝑒𝑔,, and for windows ''𝜗'',,𝑤𝑖𝑛,, are parameters of [wiki:doc/tec/usm USM].\\ 219 221 ''Φ'',,𝑚,𝑡𝑜𝑡,, is the of total mass specific thermal load, internal and external. 220 222 {{{ … … 224 226 \end{align*} 225 227 }}} 226 The ambient temperature ''𝜗'',,𝑎𝑚𝑏,, is the undisturbed outside temperature and an input of PALM Model. The near façade temperature ''𝜗'',,𝑛𝑒𝑎𝑟,𝑓𝑎𝑐,, is the outside air temperature 10 cm away from the façade and an input of the Surface mod.\\228 The ambient temperature ''𝜗'',,𝑎𝑚𝑏,, is the undisturbed outside temperature and an input of PALM Model. The near façade temperature ''𝜗'',,𝑛𝑒𝑎𝑟,𝑓𝑎𝑐,, is the outside air temperature 10 cm away from the façade and an input of the [wiki:doc/tec/lsm Land surface model (LSM)].\\ 227 229 228 230 ''ϑ'',,m,t,, is the (fictive) component temperature at actual time step. … … 289 291 \end{align*} 290 292 }}} 291 The intended air temperatures for heating ϑ_(h,set) and for cooling ''ϑ'',,c,set,, are parameters of USM. \\293 The intended air temperatures for heating ϑ_(h,set) and for cooling ''ϑ'',,c,set,, are parameters of [wiki:doc/tec/usm USM]. \\ 292 294 To estimate the needed amount of heating/ cooling, the unlimited heating/cooling demand ''Φ'',,HC,nd,un,, is calculated without the consideration of the maximum thermal capacity. 293 295 {{{ … … 320 322 \end{align*} 321 323 }}} 322 The maximal heating ''Φ'',,heat,max,, and cooling ''Φ'',,cool,max,, power is calculated with the heat flux ''q'',,h,max,, and ''q'',,c,max,, which are parameters of USM.324 The maximal heating ''Φ'',,heat,max,, and cooling ''Φ'',,cool,max,, power is calculated with the heat flux ''q'',,h,max,, and ''q'',,c,max,, which are parameters of [wiki:doc/tec/usm USM]. 323 325 {{{ 324 326 #!Latex … … 346 348 \end{align*} 347 349 }}} 348 The anthropogenic heat parameter for heating c_(waste,heat) and cooling c_(waste,cool) are parameters of USM.\\350 The anthropogenic heat parameter for heating c_(waste,heat) and cooling c_(waste,cool) are parameters of [wiki:doc/tec/usm USM].\\ 349 351 \\ 350 352
