| 中文摘要 |
依據職業安全衛生法要求，事業單位必須提供勞工足夠之新鮮空氣。本研究模擬在此規定下二氧化碳累積情形，藉此評估工作場所新鮮空氣換氣量規定下二氧化碳濃度累積狀況，並探討應用二氧化碳監測數據進行新鮮空氣換氣量管理之可行性。研究透過程式模擬方式，假設均勻混合模式理論，計算不同換氣率、作業人數下二氧化碳累積情形，探討在法規新鮮空氣換氣量要求下二氧化碳濃度變化情形，並探討應用二氧化碳監測數據來管理工作場所換氣量要求。模擬結果與實驗室暴露腔實際監測數據非常接近，此程式模擬了法規通風量要求下工作場所二氧化碳濃度變化情形，研究發現法規最基本要求下二氧化碳平衡濃度、4小時最高濃度、2小時平均濃度及4小時平均濃度均可能超過1,000ppm。換氣量及每小時空氣換氣率(Air Change Per Hour, ACH)都會影響工作場所二氧化碳累積情形，法規已將此二項因素納入考慮，只是依據模擬結果來看，若要達到室內空氣品質要求1,000ppm，應考慮增加空間或換氣量要求。另一方面，二氧化碳監測結果常被應用於通風換氣效果與室內空氣品質評估，因此應該一併考慮二氧化碳監測與通風換氣量評估此二項法規要求項目，建議透過例行性之二氧化碳監測數據來評估勞工作業環境實態，若是二氧化碳平均濃度低於1,000ppm，應該已符合法規對於通風換 |
| 英文摘要 |
According to Enforcement Rules of the Occupational Safety and Health Act, employer have an obligation to provide sufficient fresh air in the workplace. This study simulated the accumulation of carbon dioxide (CO2) under the current rule and discussed the feasibility of fresh air exchange management. This study assumed the well-mixed models to simulate the accumulation of CO2 with different air exchange rates at workplace. The concentration of CO2 could be managed under regulation by monitoring data. We found that simulation results were similar to monitoring data from chamber experiment. Both of the average concentrations of CO2 in the two and four hour and the maximum concentration in four hour could exceed the regulated concentration of 1,000 ppm. The CO2 concentration would be affected by the ventilation volume and air exchange rate. Although the current regulation had considered these factors, we should increase the ventilation volume to reach the requirement of indoor air quality. We can also assess the consequences of ventilation and indoor air quality by CO2 monitoring data. In addition, regulation should consider CO2 monitoring data and ventilation effect at the same time. We suggests that employer should check and improve the ventilation devices when the concentration of CO2 exceed 1,000 ppm. Employers can also assess the working environment through CO2 measurement concentration periodically. |
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