function updateRangeInput(elem) {
  $(elem).next().val($(elem).val());
}

/*time in hours*/
var js_day_time = 24;
var c_w = 1.163;/* Specific heat capacity of the storage fluid (1.163 Wh/(kg.K) for water)-------- */

/*Konstanten: Warmwasserbedarf pro Person und Jahr*/

/*Konstanten: Konstanten: Spezifische Heizlast*/
var spez_hlast_1=75;

function slide22() {
    /*---Getting gebäudetyp und baujahr des gebäudes from input----*/
    var js_gbttyp = document.getElementById("js_gbttyp").value;
    var js_gbsan = document.getElementById("js_gbsan").value;
    var js_gbbaujahr = document.getElementById("js_gbbaujahr").value;
    
    var xhr = new XMLHttpRequest();
    xhr.open("GET", "get_db_gebaeude.php?trial_out=" + js_gbttyp + "&gbsan=" + js_gbsan, true);

    xhr.onreadystatechange = function () {
        if (xhr.readyState === 4 && xhr.status === 200) {
            var recordData = JSON.parse(xhr.responseText);
            console.log("Record Data:", recordData);
            var gbt_class = recordData[js_gbbaujahr];
            console.log("TransmissionLoss:", gbt_class)
            pvt(gbt_class);
            toggleListItems();
        }
    };
    xhr.send();
}


/*This is the main function and is used to interact with the database and getting the values from the database 
for Heat load calculation from this function slider_pvt is triggered and from there function main_func*/

function slider_22()
{
/*---Getting gebäudetyp und baujahr des gebäudes from input----*/
var js_gbttyp = document.getElementById("js_gbttyp").value;
var js_gbsan = document.getElementById("js_gbsan").value;
var js_gbbaujahr = document.getElementById("js_gbbaujahr").value;
trial_out_value=js_gbttyp;

//String formattedNumber = String.format("%02d", js_pvttype_int); 

var xhr = new XMLHttpRequest();
xhr.open("GET", "get_db_wp_design.php?trial_out=" + trial_out_value, true);

xhr.onreadystatechange = function () {

  if (xhr.readyState === 4 && xhr.status === 200) { 
	//alert(xhr.responseText);
    var recordData = JSON.parse(xhr.responseText);
	  console.log("Record Data:", recordData);
	  var gbt_class= recordData[js_gbbaujahr];
	  //alert(gbt_class);
    //calling the other function and passing the gbt_class as variable so that it can be passed as variable together with the parameters to the funciton slider2
    //slider_pvt(gbt_class);
    pvt(gbt_class);
    
    toggleListItems();
  }
};
xhr.send();

}

function slider()
{
  var js_gbttyp = document.getElementById("js_gbttyp").value;
  var js_gbsan = document.getElementById("js_gbsan").value;
  var js_gbbaujahr = document.getElementById("js_gbbaujahr").value;
  console.log(js_gbttyp, js_gbsan, js_gbbaujahr)
  const gbt_class = 1.5
  pvt(gbt_class);
  toggleListItems();
}


function pvt (gbt_class){
  var js_hersteller = document.getElementById("js_hersteller").value;
  var eta_0; var K_b; var K_d; var c1; var c2; var c3; var c4; var c5; var c6; var c7; var c8;

  // Assign different dynamic values based on the selected manufacturer (js_hersteller)
    switch (js_hersteller) {
      case "Consolar":
        eta_0 =0.532 ; K_b=1 ; K_d=1 ; c1=19.08 ; c2=0 ; c3=3.69 ; c4=0.434 ; c5=0 ; c6=0.067 ; c7=0 ; c8=0 ;
        break;

      case "DualSun1":
        eta_0 =0.452 ; K_b=0.9409 ; K_d=0.88 ; c1=19.65 ; c2=0 ; c3=1.85 ; c4=0.45 ; c5=20800 ; c6=0.018 ; c7=0 ; c8=0 ;
        break;

      case "SunMaxx":
        eta_0 =0.584 ; K_b=1 ; K_d=1 ; c1=19.57 ; c2=0 ; c3=2.072 ; c4=0.49 ; c5=13500 ; c6=0.018 ; c7=0 ; c8=0 ;
        break;

      case "TripleSolar":
        eta_0 =0.468 ; K_b=1 ; K_d=0.953 ; c1=22.99 ; c2=0 ; c3=7.572 ; c4=0.434 ; c5=26500 ; c6=0.067 ; c7=0 ; c8=0 ;
        break;

      case "Solvis":
        eta_0 =0.52 ; K_b=0.92 ; K_d=1 ; c1=5.08 ; c2=0.02 ; c3=0 ; c4=0 ; c5=0 ; c6=0 ; c7=0 ; c8=0 ;
        break;
        
      case "nd_Systeme":
        eta_0 =0.63 ; K_b=0.98 ; K_d=0.99 ; c1=12.24 ; c2=0.06 ; c3=1.7 ; c4=0.57 ; c5=47900 ; c6=0.03 ; c7=0 ; c8=0 ;
        break;
    }
    console.log(gbt_class,eta_0,K_b,K_d, c1, c2, c3, c4, c5, c6, c7, c8)
  main_func(gbt_class,eta_0,K_b,K_d, c1, c2, c3, c4, c5, c6, c7, c8);
  }


  /*Function for connecting with the table pvt_collector and get the parameters */ 

function slider_pvt (gbt_class)
{
  var js_hersteller = document.getElementById("js_hersteller").value;
  trial_out_value=js_hersteller;
  //alert(trial_out_value);
  var xhr_pvt = new XMLHttpRequest();
  xhr_pvt.open("GET", "db_pvt_para.php?trial_out=" + trial_out_value, true);
  
  xhr_pvt.onreadystatechange = function () 
  {
    if (xhr_pvt.readyState === 4 && xhr_pvt.status === 200) { 
      var recordData2 = JSON.parse(xhr_pvt.responseText);
      console.log("Record Data PVT:", recordData2);
      var js_hersteller= recordData2[js_hersteller];
      var eta_0 = recordData2.eta_0;
      var K_b = recordData2.K_b;
      var K_d= recordData2.K_d;
      var c1= recordData2.c1;
      var c2= recordData2.c2;
      var c3= recordData2.c3;
      var c4= recordData2.c4;
      var c5= recordData2.c5;
      var c6= recordData2.c6;
      var c7= recordData2.c7;
      var c8= recordData2.c8;
      main_func(gbt_class,eta_0,K_b,K_d, c1, c2, c3, c4, c5, c6, c7, c8);

    } else {
      console.log("Request failed with status:", xhr_pvt.status);
    }

  };
  xhr_pvt.send();
}

/* --------Here we read all the inputs and do the calculation inside this function--------------------- */
function main_func(gbt_class,eta_0,K_b,K_d, c1, c2, c3, c4, c5, c6, c7, c8){
  console.log("Parameters:", eta_0,K_b,K_d, c1, c2, c3, c4, c5, c6, c7, c8)
  /* -------------------------------Projeckt variables------------------------------------------------ */
  /* var js_projname = document.getElementById("js_projname").value;
  var js_proplz = document.getElementById("js_proplz").value;
  var js_proort = document.getElementById("js_proort").value;
  var js_projstraß = document.getElementById("js_projstraß").value; */
  /* ------------------------------------------------------------------------------- */

  /*Gebäude und system variables ------------------------------------------------------------------------------- */
  var js_heizlast = document.getElementById("js_heizlast").value;
  js_heizlast=parseFloat(js_heizlast);
  //alert(3);
  var js_wohneinheiten = document.getElementById("js_wohneinheiten").value;
  js_wohneinheiten=parseFloat(js_wohneinheiten);

  var js_anbewoh = document.getElementById("js_anbewoh").value;
  js_anbewoh=parseFloat(js_anbewoh);

  var js_sperrdauer = document.getElementById("js_sperrdauer").value;
  js_sperrdauer=parseFloat(js_sperrdauer);
  
  //var js_anzsperrdauer = document.getElementById("js_anzsperrdauer").value;
  //js_anzsperrdauer=parseFloat(js_anzsperrdauer);

  var js_gbttyp = document.getElementById("js_gbttyp").value;
  //js_gbttyp=parseFloat(js_gbttyp);

  var js_gbbaujahr = document.getElementById("js_gbbaujahr").value;
  //js_gbbaujahr=parseFloat(js_gbbaujahr);

  var js_heizgrenztemp = document.getElementById("js_heizgrenztemp").value;
  js_heizgrenztemp=parseFloat(js_heizgrenztemp);

  var js_beheizte_flaeche = document.getElementById("js_beheizte_flaeche").value;
  js_beheizte_flaeche =parseFloat(js_beheizte_flaeche );

  var js_normaussentemp = document.getElementById("js_normaussentemp").value;
  js_normaussentemp=parseFloat(js_normaussentemp);

  /* ------------------------------------------------------------------------------- */
  /* -----------------------Heizlast Calculation------------------------------------ */

  var T_amb_ext = js_normaussentemp;
  var T_amb_int = 19; //For wohngebäude, this temperature is 20
  var h = 2.5; //for residential building h=2.5 is standard

  // Determination of the Luftwechselrate (/h) based on the table from DIN EN 12831-1
  // Extract the first four characters from js_gbbaujahr
  var baujahr= js_gbbaujahr.substr(0, 4);

  // Convert the extracted string to a number
  var baujahr = parseInt(baujahr);
  var n; // Initialize the variable n
  if (baujahr >= 1995) {
      n = 0.25;
  } else if (baujahr < 1977) {
      n = 1;
  } else {
      n = 0.5;
  }
  //alert(n)

  var H_L = js_beheizte_flaeche*h*n*0.34 ;
  //alert(H_L);
  var H_T = gbt_class;
  //alert(H_T);
  var gain_int= 3;       // 3 W/m2
  var gain_sol = 0;      // Need to edit it
  var gain_factor = 0.95; 
  var gains= gain_factor*((gain_int * js_beheizte_flaeche) + gain_sol );
  var normheizlast_self = ((js_beheizte_flaeche*H_T*(T_amb_int-T_amb_ext))+(H_L*(T_amb_int-T_amb_ext))-gains)/1000;
  console.log("Calculated Heizlast:", normheizlast_self);

  //alert(normheizlast_self);
  /* ------------------------------------------------------------------------------------------------- */
  /* -------------------------- Raumheizung  variables ---------------------------------------------- */

  var js_heiztyp = document.getElementById("js_heiztyp").value;
  //alert(js_heiztyp);
  js_heiztyp=parseFloat(js_heiztyp);

  var js_vorlauf = document.getElementById("js_vorlauf").value;
  js_vorlauf=parseFloat(js_vorlauf);

  var js_rücklauf = document.getElementById("js_rücklauf").value;
  js_rücklauf=parseFloat(js_rücklauf);

  var js_speichtemp = document.getElementById("js_speichtemp").value;
  js_speichtemp=parseFloat(js_speichtemp);

  /* ----------------------------------------------------------------------------------------------------- */
  /* ------------------------------Trinkwarmwasser variables------------------------------------------------- */

  var js_berechnach = document.getElementById("js_berechnach").value;
  js_berechnach=parseFloat(js_berechnach);

  var js_trinkspeichtemp = document.getElementById("js_trinkspeichtemp").value;
  js_trinkspeichtemp=parseFloat(js_trinkspeichtemp);

  var js_kaltwassertemp = document.getElementById("js_kaltwassertemp").value;
  js_kaltwassertemp=parseFloat(js_kaltwassertemp);

  var js_zirk = document.getElementById("js_zirk").value;
  js_zirk=parseFloat(js_zirk);

  //alert(js_kaltwassertemp)

  /* -----------------------------------------------------------------------------------------------------*/
  /* -------------STEP 1 and 2: Calculation of daily heat demand:-----------------------------------------*/

  var Q_h_n_dialy = js_heizlast*js_day_time;
  var Q_h_n = js_heizlast;
  
  /* ------------------------------------------------------------------------------------------------------*/
  /*------------------------ STEP 3: Calculation of daily DHW demand---------------------------------------*/
  /* ------------------------Daily energy required for DHW preparation-------------------------------------*/

  //var Q_dpb = js_wohneinheiten*2.24;

  /* -----------The total daily energy requirement for the day is calculated as below based on the Berechnung Nach input-----------------------*/

  //var Q_dp = js_wohneinheiten*5.845;
  switch (js_berechnach) {
    /*----------Wohneinheiten----------------*/
    case 1:
      var Q_dp = js_wohneinheiten*5.845;
      var Q_dpb = js_wohneinheiten*2.24; // Peak demand for storage sizing is 
      break;
    
    /*--------Personnenzahl-----------------*/
      case 2:
        var Q_dp = js_anbewoh*2.4; //2.4 kWh/day per person of heat demand assumed (medium-low i.e. 60 L/day/person)
        var Q_dpb = js_anbewoh*0.945; //Considering peak demand of 0.945 kWh from VDI
        break;
  }

  /* ------------------------Heat losses from the manufacturer’s specification (considering storage efficiency)------------------------------*/
  var Q_dp_ges = Q_dp + 2.6;

  /* ------------------------------------------------------------------------------------------------------*/
  /*---------------------------------Step 4: DHW Tank Sizing-----------------------------------------------*/
  /* ---------------------------Required storage volume for the direct storage of the DHW------------------*/

  var V_dpb = Q_dpb*1000/(c_w*(js_trinkspeichtemp-(js_kaltwassertemp)));

  /* -------------------------Volume to compensate for the circulation losses------------------------------ */
  switch (js_zirk) {
  /*----------Heizkörper----------------*/
  case 1:
    var Q_zirk = 0.26 ;     /* circulation losses are fixed and amount to 6.2 kWh/24 h i.e. 0.26 kWh for 1 hour of reference period at 55 °C rücklauf temp-------- */
  break;
    
  /*--------Boden Heizung--------------*/
  case 2:
    var Q_zirk = 0 ;
  break;
  }

  var js_zir_rl_wassertemp = js_trinkspeichtemp-5; /*----------Difference in temperature----------------*/
  var V_zirk = Q_zirk*1000/(c_w*(js_trinkspeichtemp-(js_zir_rl_wassertemp)));

  /* ------------------------------Storage volume with a 15 % surcharge for storage efficiency------------- */
  var f_twe = 1.15;   /* Surcharge for the assumption of mixing losses when storing DHW-------- */
  var V_sp_min = (V_dpb+V_zirk)*f_twe;

  /* ----------------------------------------------------------------------------------------------------- */
  /*-----------------------------------Step 5: SH Tank Sizing----------------------------------------------*/
  /* ---------------------------Required storage volume for the direct storage of the DHW----------------- */

  switch (js_heiztyp) {
  /*----------Heizkörper----------------*/
  case 1:
  var a_0 = 53.8;
  var a_1 = 81.54;
  break;

  /*--------Boden Heizung--------------*/
  case 2:
  var a_0 = 28.1;
  var a_1 = 19.4;
  break;
  }

  /* ----------------------------required storage size for space heating is determine------------------------*/
  var V_r_h = a_0*js_heizlast+a_1;

  /* --------------------------------------------------------------------------------------------------------*/
  /*---------------------------------Step 6: Heat pump Sizing------------------------------------------------*/
  /* ---------------------Heat pump size to fulfil the space heating and domestic hot water demand-----------*/
  var Q_sonst = 0;
 
  var Q_heiz_tww_ohn_sp = (Q_h_n_dialy+Q_dp_ges+Q_sonst+Q_zirk)/js_day_time;

  var Q_wp_erf = (Q_h_n_dialy+Q_dp_ges+Q_sonst+Q_zirk)/(js_day_time-js_sperrdauer);

  var Q_tww = (Q_dp_ges+Q_zirk)/js_day_time
  /*-------------------------------------Output WP-System----------------------------------------------------*/
  /*Ergebnisübersicht WP DESIGN */

  if (isNaN(Q_heiz_tww_ohn_sp)){
    document.getElementById("outputBox_heizleistung_ink_tww").innerHTML = "0.00 "//Math.round(Q_heiz_tww_ohn_sp)
  }else{
    document.getElementById("outputBox_heizleistung_ink_tww").innerHTML = Q_heiz_tww_ohn_sp.toFixed(2)
  }
  
  if (isNaN(Q_wp_erf)){
    document.getElementById("outputBox_erförder_wp_size").innerHTML = "0.00"//Math.round(Q_wp_erf)
  }else{
    document.getElementById("outputBox_erförder_wp_size").innerHTML = Q_wp_erf.toFixed(2)
  }

  if (isNaN(V_sp_min)){
    document.getElementById("outputBox_tww_speicher_größe").innerHTML = "0.00"//Math.round(V_sp_min)
  }else{
    document.getElementById("outputBox_tww_speicher_größe").innerHTML = Math.round(V_sp_min)
  }
  
  if (isNaN(V_r_h)){
    document.getElementById("outputBox_rh_speicher_größe").innerHTML = "0.00"//Math.round(V_r_h)
  }else{
    document.getElementById("outputBox_rh_speicher_größe").innerHTML = Math.round(V_r_h)
  }

  //document.getElementById("out_erförder_wp_size").innerHTML = Math.round(Q_wp_erf)
  //document.getElementById("out_erförder_wp_size").innerHTML = Math.round(Q_wp_erf);
  //document.getElementById("out_tww_speicher_größe").innerHTML = Math.round(V_sp_min);
  //document.getElementById("out_rh_speicher_größe").innerHTML = Math.round(V_r_h);


  //FROM HERE ANOTHER FUNCTION WITH THE NECESSARY INPUT FIELDS
  //js_betriebsmod, js_normaussentemp, js_bivalenztemp,js_heizgrenztemp,js_beheizte_flaeche, eta0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,Q_h_n_dialy,H_T, H_L, T_amb_int
  /* ---------------------------------------------------------------------------------------------------- */
  /*----------------------WP Selection variables IMP: ADD HERE the Vorlauftemperatur for WP-------------- */

  var js_betrimod = document.getElementById("js_betrimod").value;
  js_betrimod=parseFloat(js_betrimod);

  var js_bivalenz_temp = document.getElementById("js_bivalenz_temp").value;
  js_bivalenz_temp=parseFloat(js_bivalenz_temp);

  var js_gewaehlwp = document.getElementById("js_gewaehlwp").value;
  js_gewaehlwp=parseFloat(js_gewaehlwp);

  var js_minverdampfertemp = document.getElementById("js_minverdampfertemp").value;
  js_minverdampfertemp=parseFloat(js_minverdampfertemp);

  //var js_wpvorlauftemp = document.getElementById("js_wpvorlauftemp").value;
  //js_wpvorlauftemp=parseFloat(js_wpvorlauftemp);

  var js_cop = document.getElementById("js_cop").value;
  js_cop=parseFloat(js_cop);

  var js_wpnennleist = document.getElementById("js_wpnennleist").value;
  js_wpnennleist=parseFloat(js_wpnennleist);

  //var js_wpvorlauftemp_2 = document.getElementById("js_wpvorlauftemp_2").value;
  //js_wpvorlauftemp_2=parseFloat(js_wpvorlauftemp_2);

  var js_cop_2 = document.getElementById("js_cop_2").value;
  js_cop_2=parseFloat(js_cop_2);

  var js_wpnennleist_2 = document.getElementById("js_wpnennleist_2").value;
  js_wpnennleist_2=parseFloat(js_wpnennleist_2); 

  /* ---------------------------------------------------------------------------------------------------- */
  /* -------------------------------Weather conditions variables----------------------------------------- */
  
  //var js_außentemp = document.getElementById("js_außentemp").value;
  //js_außentemp=parseFloat(js_außentemp);

  var js_globstrahl = document.getElementById("js_globstrahl").value;
  js_globstrahl=parseFloat(js_globstrahl);

  var js_windgeschwind = document.getElementById("js_windgeschwind").value;
  js_windgeschwind=parseFloat(js_windgeschwind);

  var js_himmel = document.getElementById("js_himmel").value;
  js_himmel=parseFloat(js_himmel);

  //var js_desivltemppvt = document.getElementById("js_desivltemppvt").value;
  //js_desivltemppvt=parseFloat(js_desivltemppvt);

  /* ----------------------------------------------------------------------------------------------------- */
  /* ---------------------------PVT Modules variables----------------------------------------------------- */

  var js_hersteller = document.getElementById("js_hersteller").value;
  js_hersteller=parseFloat(js_hersteller);

  //var js_model = document.getElementById("js_model").value;
  //js_model=parseFloat(js_model);

  /* --------------------------------------------------------------------------------------------------------*/
  /*-------------------------------Step 7: PVT Design--------------------------------------------------------*/
  /*--------Heat pump characteristics for different operation modes and inlet temperatures---------------------*/
  switch (js_betrimod){
    case 1:
      /*----------Monovalent---------------------------*/
      var wp_vorlauftemp = js_minverdampfertemp; //WICHTIG: wp_vorlauftemp is the evaporator inlet temperature
      var tamb = wp_vorlauftemp+5; /*----- In ideal case has to be equal to the normaussentemperatur-----*/
      //var Q_biv = (Q_h_n*(js_heizgrenztemp-js_bivalenz_temp))/(js_heizgrenztemp-(js_normaussentemp));
      var cop_wp =js_cop;
      var qdot_wp = js_wpnennleist;
      var q_heizstab= 0;
      var q_dp = Q_heiz_tww_ohn_sp
      break;
    
      case 2:
      /*--------Bivalent Alternative mode-------------*/
      var wp_vorlauftemp = js_bivalenz_temp-5;
      var tamb = wp_vorlauftemp+5;
      var Q_biv = Q_tww+((Q_h_n*(js_heizgrenztemp-js_bivalenz_temp))/(js_heizgrenztemp-(js_normaussentemp)));
      var Q_biv_self = ((js_beheizte_flaeche*H_T*(T_amb_int-js_bivalenz_temp))+(H_L*(T_amb_int-js_bivalenz_temp)))/1000;
      var cop_wp =js_cop_2;
      var qdot_wp = js_wpnennleist_2;  /*----- In this case js_wpnennleist_2 has to equal at least Q_biv -----*/
      var q_heizstab = Q_wp_erf;
      var q_dp = Q_biv
      break;
    
      case 3:
      /*-------- Bivalent Parallel mode --------------*/
      var wp_vorlauftemp = js_bivalenz_temp-5;  //this temperature is taken for PVT design at bivalence point
      var tamb = js_bivalenz_temp;   //this is the ambient temperature for the 
      var tamb_min = js_minverdampfertemp+5; /*----- Or Abschaltpunkt?? -----*/
      var Q_biv = Q_tww+(((Q_h_n*(js_heizgrenztemp-js_bivalenz_temp))/(js_heizgrenztemp-(js_normaussentemp))));
      var Q_biv_self = ((js_beheizte_flaeche*H_T*(T_amb_int-js_bivalenz_temp))+(H_L*(T_amb_int-js_bivalenz_temp)))/1000; /*----- Calculated from the formula for calculating heizlast at ambient temperature-----*/
      var cop_wp =js_cop_2;
      var qdot_wp = js_wpnennleist_2;
      var q_heizstab= Q_wp_erf-js_wpnennleist;
      var q_dp = Q_biv

      /*--------- Performance at Abschaltpunkt --------*/
      var Q_abs = (Q_h_n*(js_heizgrenztemp-tamb_min))/(js_heizgrenztemp-(js_normaussentemp)); 
      var Q_abs_self = ((js_beheizte_flaeche*H_T*(T_amb_int-tamb_min))+(H_L*(T_amb_int-tamb_min)))/1000; /*----- Calculated from the formula for calculating heizlast at ambient temperature -----*/
      
      break;
  }
  
  // if wp_vorlauftemp+3 < Normaussentemperatur; wp_vorlauftemp == Normaußentemp-5 
  /*
  if (tamb < js_normaussentemp){
    tamb= js_normaussentemp;
    wp_vorlauftemp= js_normaussentemp-5;
  }else{
    tamb = tamb;
    wp_vorlauftemp= wp_vorlauftemp;
  }
*/
  /* -----------------------------Required thermal power from PVT---------------------------------------------*/
  var t_pvt_out =wp_vorlauftemp;
  var t_pvt_in = t_pvt_out-3;
  var qdot_pvt = qdot_wp-(qdot_wp/cop_wp);
  var qdot_pvt = 1.15 * qdot_pvt; /*Adding 15 % deicing safety */
  var tm_pvt = (t_pvt_in+t_pvt_out)/2;
  var G_hem =js_globstrahl;
  var Gd = 0.3*G_hem;   //30% is diffused and 70% is beam radiation
  var Gb = G_hem - Gd;

  switch(js_himmel){
    case 1:
      var js_himmelstemp = tamb-20;
      break;

    case 2:
      var js_himmelstemp = tamb-10;
      break;

    case 3:
      var js_himmelstemp = tamb;
      break;
  }
    

  //var E_L =(5.67 *10**-8) * (js_himmelstemp+273.15)**4; //this is also true
  var E_L = (5.67 * Math.pow(10, -8)) * Math.pow(js_himmelstemp + 273.15, 4);
  var u =js_windgeschwind;

  /* ---------------------------- QDT ISO 9806 ---------------------------------------------------------------*/
  var q_pvt_spezifisch = (eta_0* Gb*K_b) + (eta_0*Gd*K_d)- c1*(tm_pvt-tamb)-c2*(tm_pvt-tamb)**2 - c3*u*(tm_pvt-tamb) + c4*(E_L-((5.67*10**-8)*(tamb+273)**4))-(c6*u*G_hem) - (c7*u*(E_L-((5.64*10**-8)*(tamb+273)**4)))-(c8*(tm_pvt-tamb)**4);
  var q_pvt_spezifisch = q_pvt_spezifisch/1000;

  /* ----------------------------Area of PVT Collectors-------------------------------------------------------*/
  var pvt_flaeche = qdot_pvt/q_pvt_spezifisch;
  var pvt_energie= qdot_pvt;
  
  /*------------------------------------- Ergebnisübersicht PVT DESIGN--------------------------------------- */
  if (isNaN(q_dp)){
    document.getElementById("outputBox_qdp").innerHTML = "0.00";//Math.round(q_dp);
  }else{
    document.getElementById("outputBox_qdp").innerHTML = q_dp.toFixed(3); //Math.round(q_dp);
  }

  if (isNaN(qdot_wp)){
    document.getElementById("outputBox_wp_leistung").innerHTML = "0.00";//Math.round(qdot_wp);
  }else{
    document.getElementById("outputBox_wp_leistung").innerHTML = qdot_wp.toFixed(3); //Math.round(qdot_wp);
  }

  if (isNaN(q_pvt_spezifisch)){
    document.getElementById("outputBox_pvt_spezifisch").innerHTML = "0.00";//Math.round(q_pvt_spezifisch);
  }else{
    document.getElementById("outputBox_pvt_spezifisch").innerHTML = q_pvt_spezifisch.toFixed(3);//Math.round(q_pvt_spezifisch);
  }

  if (isNaN(pvt_flaeche)){
    document.getElementById("outputBox_pvt_flaeche").innerHTML = "0.00";//Math.round(pvt_flaeche);
  }else{
    document.getElementById("outputBox_pvt_flaeche").innerHTML = pvt_flaeche.toFixed(2);//Math.round(pvt_flaeche);
  }

  if (isNaN(pvt_energie)){
    document.getElementById("outputBox_pvt_energie").innerHTML = "0.00";//Math.round(pvt_energie);
  }else{
    document.getElementById("outputBox_pvt_energie").innerHTML = pvt_energie.toFixed(3);//Math.round(pvt_energie);
  }

  if (isNaN(q_heizstab)){
    document.getElementById("outputBox_heizstab_energie").innerHTML = "0.00"; //Math.round(q_heizstab)
  }else{
    document.getElementById("outputBox_heizstab_energie").innerHTML = q_heizstab.toFixed(3);//Math.round(pvt_energie);
  }

  //document.getElementById("out_wp_leistung").innerHTML = qdot_wp.toFixed(2); //Math.round(qdot_wp);
  //document.getElementById("out_pvt_spezifisch").innerHTML = q_pvt_spezifisch.toFixed(2);//Math.round(q_pvt_spezifisch);
  //document.getElementById("out_pvt_flaeche").innerHTML = pvt_flaeche.toFixed(2);//Math.round(pvt_flaeche);
  //document.getElementById("out_pvt_energie").innerHTML = pvt_energie.toFixed(2);//Math.round(pvt_energie);
  
  //Fixing the sink side temperature of the heat pump
  if (js_speichtemp >= js_trinkspeichtemp) {
      temp_WP_VL = js_speichtemp;
  } else {
    temp_WP_VL = js_trinkspeichtemp;
  }
  if (isNaN(wp_vorlauftemp)){
    document.getElementById("bValue").innerHTML = "-";
  }else{
    document.getElementById("bValue").innerHTML = js_minverdampfertemp.toFixed(0);
  }

  if (isNaN(temp_WP_VL)){
    document.getElementById("wValue").innerHTML = "-";
  }else{
    document.getElementById("wValue").innerHTML = temp_WP_VL.toFixed(0);
  }

  if (isNaN(js_bivalenz_temp)){
    document.getElementById("bValue2").innerHTML = "-"; 
  }else{
    document.getElementById("bValue2").innerHTML = (js_bivalenz_temp-5).toFixed(0);
  }

  if (isNaN(temp_WP_VL)){
    document.getElementById("wValue2").innerHTML = "-"; 
  }else{
    document.getElementById("wValue2").innerHTML = temp_WP_VL.toFixed(0);
  }

  if (qdot_wp < Q_wp_erf ) {
  // Display the warning message
  document.getElementById("warningMessage").style.display = "block";
 
  }else{
    document.getElementById("warningMessage").style.display = "none";
  }  

  }/*   Klammer zu der Funktion main_func()   */

/* 
For the paper we could show the sensitivity of the design point (inlet verdampfer temperature) on the PVT area? 
Area vs inlet temp 
*/

function toggleListItems() {
  const js_betrimod = document.getElementById("js_betrimod").value;
  //alert(js_betrimod)
  const listItem1 = document.getElementById("listItem1");
  const listItem2 = document.getElementById("listItem2");
  const biv_punkt = document.getElementById("list_BP");
  const inputBivalenzTemp = document.getElementById("js_bivalenz_temp");
  if (js_betrimod == "1") {
    listItem1.style.display = "block";
    listItem2.style.display = "none";
    biv_punkt.style.display = "block";
    inputBivalenzTemp.setAttribute("disabled", true);
    //biv_punkt.setAttribute("disabled", true);
  } else if (js_betrimod == "2") {
    listItem1.style.display = "none";
    listItem2.style.display = "block";
    biv_punkt.style.display = "block";
    inputBivalenzTemp.removeAttribute("disabled");
    //biv_punkt.removeAttribute("disabled");
  } else if (js_betrimod == "3") {
    listItem1.style.display = "block";
    listItem2.style.display = "block";
    biv_punkt.style.display = "block";
    inputBivalenzTemp.removeAttribute("disabled");
    //biv_punkt.removeAttribute("disabled");
  } 
}