| SQR<\/td> | Square<\/strong> For example, SQR(4) returns the value 16.<\/td><\/tr> SIN<\/td> | Sine<\/strong> in radians | For example, SIN(1.571) returns the value 1.<\/td><\/tr> COS<\/td> | Cosine<\/strong>, see also SIN<\/td><\/tr> | TAN<\/td> | Tangent<\/strong>, see also SIN<\/td><\/tr> | SINH<\/td> | Hyperbolic sine<\/strong>, see also SIN<\/td><\/tr> | COSH<\/td> | Hyperbolic cosine<\/strong>, see also SIN<\/td><\/tr> | ATAN<\/td> | Arctangent<\/strong>, see also SIN<\/td><\/tr> | COTAN<\/td> | Cotangent<\/strong>, see also SIN<\/td><\/tr> | EXP<\/td> | Exponential function<\/strong> | For example, EXP(1) returns the value 2.718.<\/td><\/tr> LN<\/td> | Natural logarithm<\/strong> | For example, LN(4) returns the value 1.386.<\/td><\/tr> LOG<\/td> | Decadic logarithm<\/strong> | For example, LOG(10) returns the value 1.<\/td><\/tr> SQRT<\/td> | Square root<\/strong> | For example, SQRT(4) returns the value 2.<\/td><\/tr> ABS<\/td> | Absolute value<\/strong> | For example, ABS(-4) returns the value 4.<\/td><\/tr> SIGN<\/td> | Sign<\/strong>, returns -1 for negative, 1 for positive and 0 for 0 | For example, SIGN (-4) returns the value -1.<\/td><\/tr> TRUNC<\/td> | Integer part<\/strong> | For example, TRUNC(-3.7) returns the value -3.<\/td><\/tr> CEIL<\/td> | Round up<\/strong> to the next higher integer | For example, CEIL(-3.7) returns the value -3.<\/td><\/tr> FLOOR<\/td> | Round down<\/strong> to the next lower integer For example, FLOOR(-3.7) returns the value -4.<\/td><\/tr> | RND<\/td> | Integer random number<\/strong> The upper limit of the random number should be specified as an argument.<\/td><\/tr> | RANDOM<\/td> | Random number<\/strong> with decimal places The lower limit of the random number should be specified as an argument.<\/td><\/tr> | MIN<\/td> | Minimum value<\/strong> | For example, MIN(2, 3) returns the value 2.<\/td><\/tr> MAX<\/td> | Maximum value<\/strong> | For example, MAX(2, 3) returns the value 3.<\/td><\/tr> IF<\/td> | If <\/strong>(condition, return value for condition complied with, return value for condition non complied with). If the condition is complied with, the first return value will be returned as a result, otherwise the second. Operations too may be used as a return value; depending on the condition, only the appropriate return value will be evaluated. Several IF functions may be nested in one another. For example, IF(1>2, 3, 4) returns the value 4.<\/td><\/tr> | SUM<\/td> | Sum <\/strong>of any number of arguments. | For example, SUM(1, 2, 3) returns the value 6.<\/td><\/tr> MATCHFLOW | (\\(T_{i}\\), \\(Q\\), \\(T_{a}\\), \\(C_{p}\\), \\({\\dot{V}}_{\\min}\\), \\({\\dot{V}}_{\\max}\\))<\/td> Regulation of a flow-rate <\/strong>in l\/to the desired temperature | MATCHFLOW( \\(T_{i}\\) Inlet temperature in \u00b0C, for example to the collector, \\(Q\\) Power in W, for example power of the collector, \\(T_{a}\\) Outlet temperature in \u00b0C, for example the desired target temperature, \\(C_{p}\\) Heat capacity in J\/(l*K), for example, the heat capacity of the fluid, \\({\\dot{V}}_{\\min}\\) min. flow-rate in l\/h, for example the lower limit of the pump, \\({\\dot{V}}_{\\max}\\) max. flow-rate in l\/h, for example the upper limit of the pump) \\(\\dot{V} = \\dot{\\frac{Q}{C_{p}*\\left( T_{a} – T_{i} \\right)}}*3600\\)<\/td><\/tr> MATCHPOWER | (\\(T_{i}\\), \\(\\dot{V}\\), \\(T_{a}\\), \\(C_{p}\\), \\({\\dot{Q}}_{\\min}\\), \\({\\dot{Q}}_{\\max}\\))<\/td> Regulation of a power <\/strong>in W to the desired temperature | MATCHPOWER( \\(T_{i}\\)\u00a0Inlet temperature in \u00b0C, for example to the boiler \\(\\dot{V}\\)\u00a0Flow-rate in l\/h, for example, flow-rate of the boiler pump, \\(T_{a}\\)\u00a0Outlet temperature in \u00b0C, for example the desired target temperature, \\(C_{p}\\)\u00a0Heat capacity in J\/(l*K), for example, the heat capacity of the fluid, \\({\\dot{Q}}_{\\min}\\)\u00a0min. power in W, for example the lower limit of the boiler pump, \\({\\dot{Q}}_{\\max}\\)\u00a0max. power in W, for example, the upper limit of the boiler pump) \\(\\dot{Q} = \\left( T_{a} – T_{i} \\right)*C_{p}*\\dot{V}\/3600\\) If Qmin \/ Qmax 0 the values will not be taken into account; otherwise, the\u00a0 result Q will be restricted to these minimum\/maximum values before being returned.<\/td><\/tr> MATCHRATE | (\\(T_{u}\\), \\(T_{l}\\), \\(T_{o}\\))<\/td> Regulation of a mixing ratio <\/strong>to the desired temperature | MATCHRATE( \\(T_{u}\\) Upper level temperature in \u00b0C, for example hot water inlet to mixing valve, \\(T_{l}\\) Lower level temperature in \u00b0C, for example cold water inlet to mixing valve, \\(T_{o}\\) Outlet temperature in \u00b0C, for example the desired target temperature) \\(p = \\frac{T_{u} – T_{o}}{T_{u} – T_{l}}\\)<\/td><\/tr> MEANVALUE | (\\(a\\), \\(b\\))<\/td> Arithmetic mean value of two values | <\/strong>MEANVALUE ( \\(a\\) value 1, for example a temperature value from the latest time step \\(b\\) value 2, for example a temperature value from the current time step) \\(m = \\frac{a + b}{2}\\)<\/td><\/tr> HEATINGCURVE(Tsoll<\/sub>, Ta_norm<\/sub>, a, Ta<\/sub>)<\/td> | Regulation of temperature based on the heating curve (function HEATINGCURVE)<\/strong> | ![\"\"](\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2023\/10\/image224.png\") The function adopts 4 parameters: Tsoll<\/sub>: nominal inlet temperature heating elements (= max VL in the chart) [\u00b0C] Ta_norm<\/sub>: design outdoor temperature (for the Tsoll<\/sub> gilt (= -14\u00b0C in the chart)[\u00b0C] a: heating curve gradient Ta<\/sub>: current outdoor temperature [\u00b0C] The point (= 20\u00b0C in the chart) where the curve meets the x-axis is determined from the remaining parameters.<\/td><\/tr> PVPROG (\\(t,\\ P_{pv}, \\ P_{ld},\\ p_{gfl},\\ P_{gsl},\\), | \\(t_{fpast}, \\ t_{fhor}, \\ \\mathrm{\\Delta}t_{freq}, \\ \\mathrm{\\Delta}t_{f})\\))<\/td> Forecast-based battery control <\/strong>with measurement-based PV- and consumption forecasts. | PVPROG (\\(t\\ \\) current simulation time in s, \\(P_{pv}\\) PV production AC (before curtailment) in W, \\(P_{ld}\\) electricity consumption in W, \\(p_{gfl}\\) Feed-in limit normalised to the installed nominal PV capacity (0 to deactivate dynamic feed-in limitation through the battery), \\(P_{gsl}\\ \\) grid supply limit for the electricity consumption in W (0 to deactivate grid supply limitation), \\(t_{fpast}\\ \\) time frame in h in which the weather situation is incorporated into the PV forecasts, \\(t_{fhor}\\ \\) forecast horizon of the PV and load forecasts in h, \\(\\mathrm{\\Delta}t_{freq}\\ \\) freqency of the forecast updates in min [1 (recommended) or 15 (for a faster simulation but with a slightly reduced control accuracy and therefore with decreased system performance] \u2013 The recommended value is used without warning for unexpected inputs, \\(\\mathrm{\\Delta}t_{f}\\ \\) temporal resolution of the PV- and load forecasts [1 or 15 (recommended)] – The recommended value is used without warning for unexpected inputs)<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"author":19748,"featured_media":0,"parent":117832,"menu_order":37,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-117835","handbuch","type-handbuch","status-publish","hentry"],"acf":[],"yoast_head":"\n |