我正在尝试构建一个用于能量计算的Javascript计算器，它主要起作用，但某些数字导致浏览器选项卡崩溃。我的jsfiddle：
尝试在任何一天的放电时间输入8或任何时间输入15。
我怀疑问题与我的循环有关（在'做循环'评论下），但我看不出问题。循环的目的是确定liq_capacity需要什么值才能使fri_ending_balance变为（或接近）0。
function calculate() {
// user inputs
var sat_charge = parseInt(document.getElementById('sat_charge').value);
var sat_discharge = parseInt(document.getElementById('sat_discharge').value);
var sun_charge = parseInt(document.getElementById('sun_charge').value);
var sun_discharge = parseInt(document.getElementById('sun_discharge').value);
var mon_charge = parseInt(document.getElementById('mon_charge').value);
var mon_discharge = parseInt(document.getElementById('mon_discharge').value);
var tue_charge = parseInt(document.getElementById('tue_charge').value);
var tue_discharge = parseInt(document.getElementById('tue_discharge').value);
var wed_charge = parseInt(document.getElementById('wed_charge').value);
var wed_discharge = parseInt(document.getElementById('wed_discharge').value);
var thu_charge = parseInt(document.getElementById('thu_charge').value);
var thu_discharge = parseInt(document.getElementById('thu_discharge').value);
var fri_charge = parseInt(document.getElementById('fri_charge').value);
var fri_discharge = parseInt(document.getElementById('fri_discharge').value);
// back-end variables
var sys_power_rating = 100;
var noak = 1;
var efficiency = 60; // expressed as a percentage
var tank_escalation_factor = 0.9;
var liq_reference_cost = 16300000;
var experience_coefficient = 0.175; // expressed as a decimal
var liq_reference_size = 300;
var liq_and_pru_escalation_factor = 0.6;
var power_recovery_reference_cost = 5705000;
var power_recovery_reference_size = 3.5;
var tank_coldstore_reference_size = 100;
var liq_plant_specific_work = 0.2;
var cost_of_tank_and_coldstore = 41;
var pru_specific_work = liq_plant_specific_work * (efficiency / 100);
if (liq_plant_specific_work < 0.1) {
var tank_coldstore_reference_cost = cost_of_tank_and_coldstore * tank_coldstore_reference_size * liq_plant_specific_work;
} else {
var tank_coldstore_reference_cost = cost_of_tank_and_coldstore * tank_coldstore_reference_size * 0.1;
}
// do the loop
var liq_capacity = 1;
var fri_ending_balance = 1;
while (fri_ending_balance < -0.1 || fri_ending_balance > 0.1) {
var sat_initial_balance = 0;
var sat_production = sat_charge * liq_capacity / 24;
var sat_consumption = -1 * sat_discharge * sys_power_rating / pru_specific_work;
var sat_ending_balance = sat_initial_balance + sat_production + sat_consumption;
var sun_initial_balance = sat_ending_balance;
var sun_production = sun_charge * liq_capacity / 24;
var sun_consumption = -1 * sun_discharge * sys_power_rating / pru_specific_work;
var sun_ending_balance = sun_initial_balance + sun_production + sun_consumption;
var mon_initial_balance = sun_ending_balance;
var mon_production = mon_charge * liq_capacity / 24;
var mon_consumption = -1 * mon_discharge * sys_power_rating / pru_specific_work;
var mon_ending_balance = mon_initial_balance + mon_production + mon_consumption;
var tue_initial_balance = mon_ending_balance;
var tue_production = tue_charge * liq_capacity / 24;
var tue_consumption = -1 * tue_discharge * sys_power_rating / pru_specific_work;
var tue_ending_balance = tue_initial_balance + tue_production + tue_consumption;
var wed_initial_balance = tue_ending_balance;
var wed_production = wed_charge * liq_capacity / 24;
var wed_consumption = -1 * wed_discharge * sys_power_rating / pru_specific_work;
var wed_ending_balance = wed_initial_balance + wed_production + wed_consumption;
var thu_initial_balance = wed_ending_balance;
var thu_production = thu_charge * liq_capacity / 24;
var thu_consumption = -1 * thu_discharge * sys_power_rating / pru_specific_work;
var thu_ending_balance = thu_initial_balance + thu_production + thu_consumption;
var fri_initial_balance = thu_ending_balance;
var fri_production = fri_charge * liq_capacity / 24;
var fri_consumption = -1 * fri_discharge * sys_power_rating / pru_specific_work;
fri_ending_balance = fri_initial_balance + fri_production + fri_consumption;
liq_capacity = liq_capacity + 0.1;
}
var power_input = liq_capacity / 24 * liq_plant_specific_work;
var liq_store_capacity_tonnes = Math.max(sat_production, sat_ending_balance, sun_production, sun_ending_balance, mon_production, mon_ending_balance, tue_production, tue_ending_balance, wed_production, wed_ending_balance, thu_production, thu_ending_balance, fri_production, fri_ending_balance);
var liq_store_capacity_mwh = sys_power_rating * Math.max(sat_discharge, sun_discharge, mon_discharge, tue_discharge, wed_discharge, thu_discharge, fri_discharge);
var liq_store_capacity_mwh_effective = tank_coldstore_reference_size * pru_specific_work;
var liq_ecurve = liq_reference_cost * (Math.pow(noak, (Math.log(1-experience_coefficient)/Math.log(2))));
var pru_ecurve = power_recovery_reference_cost * (Math.pow(noak, (Math.log(1-experience_coefficient)/Math.log(2))));
var tank_and_coldstore_ecurve = tank_coldstore_reference_cost;
var liq_cost_dollars = liq_ecurve * Math.pow((liq_capacity / liq_reference_size), liq_and_pru_escalation_factor);
var pru_cost_dollars = pru_ecurve * Math.pow((sys_power_rating / power_recovery_reference_size), liq_and_pru_escalation_factor);
var tank_and_coldstore_cost_dollars = (tank_and_coldstore_ecurve * 1000) * Math.pow((liq_store_capacity_tonnes / tank_coldstore_reference_size), tank_escalation_factor);
var capex = liq_cost_dollars + pru_cost_dollars + tank_and_coldstore_cost_dollars;
var cost_kw = capex / (sys_power_rating * 1000);
var cost_kwh = capex / (liq_store_capacity_mwh * 1000);
// slap those results on the page
document.getElementById('liq_capacity').value = (liq_capacity).toFixed(0);
document.getElementById('power_input').value = (power_input).toFixed(2);
document.getElementById('liq_store_capacity_mwh').value = (liq_store_capacity_mwh).toFixed(0);
document.getElementById('efficiency').value = efficiency + '%';
document.getElementById('capex').value = (capex / 1000000).toFixed(1);
document.getElementById('cost_kw').value = (cost_kw).toFixed(2);
document.getElementById('cost_kwh').value = (cost_kwh).toFixed(2);
}
答案 0 :(得分：0)
当然 - 你走了。它有点相似（我实际上从我的真实中移除了很多）所以不想太多地混淆页面，因此jsfiddle： - ）
编辑：抱歉以错误的方式发布 - 我只是使用访客帐户在这里询问内容！这种方式至少意味着我的初始职位不会变得非常庞大。
（代码转储添加到问题中。）
编辑：非常感谢w3d！愚蠢的是，我曾经有更广泛的可接受结果（-0.9到0.9），但改变它以获得更准确的结果。无论如何它现在运行得很好，所以谢谢你的帮助:-)而且没有电子邮件通知！我只是不时地刷新。
答案 1 :(得分：0)
是的，问题在于你的循环：
while (fri_ending_balance < -0.1 || fri_ending_balance > 0.1) {
当您指定一天9的值时，＆＃34;放电＆＃34;那么fri_ending_balance的值永远不会接近0以满足你的循环条件。具体来说，fri_ending_balance永远不会变成＆gt; = -0.1和＆lt; = 0.1，所以你的循环永远不会结束。
如果您将这些结果记录到控制台，您可以看到发生了什么：
Iteration fri_ending_balance
71418 -0.5999999802772891
71419 -0.36666664694234896
71420 -0.1333333136069541 /* Should stop here */
71421 0.10000001972525752
71422 0.3333333530601976
71423 0.5666666863955925
71424 0.8000000197278041