采用了一种全新的方法对金属陶瓷发热体的电阻温度系数(Temperature Coefficient of Resistance,TCR)进行检测。该法利用外加电源对发热体进行动态升温,并连续监测发热体的温度和阻值变化,通过最小二乘法拟合电阻-温度数据,进行数学计...采用了一种全新的方法对金属陶瓷发热体的电阻温度系数(Temperature Coefficient of Resistance,TCR)进行检测。该法利用外加电源对发热体进行动态升温,并连续监测发热体的温度和阻值变化,通过最小二乘法拟合电阻-温度数据,进行数学计算得到TCR值。研究进一步分析了影响检测稳定性的因素,包括红外聚焦方法、测温点位置、连接点位置及输出电压的选择,并验证了新方法测得的数据准确性与重复性。结果表明,新方法与国标法测试结果基本一致,但具有检测时间短、检测限高、检测数据点多等优势,适用于快速批量测试金属陶瓷发热体的TCR值。展开更多
The competitiveness of the small gas turbine units (GTUs) (Ne<300 kW) in the world power market is dependent on bath the maintenance expenses and the capital costs of production. Reduction in the maintenance expend...The competitiveness of the small gas turbine units (GTUs) (Ne<300 kW) in the world power market is dependent on bath the maintenance expenses and the capital costs of production. Reduction in the maintenance expenditures could be achieved by increasing the plant efficiency. This task could be solved by some methods: increasing the cycle inlet temperature TIT, getting the cycle more complex (use of heat regeneration and compressed air intermediate cooling), cutting the power consumption on heat-stressed parts cooling. Putting the above into effect is linked with introduction of novel structural materials, a sharp increase in the mass-size values and the plant manufacture expenditures, in particular, at provision of its self-regulation. In connection with the above, the development of the combined metal-ceramic airheaters and standardization of the elemental basis of the metal gas-gas heat exchangers will promote reduction in the expenditures of the maintenance and the manufacture of the small-size independent power GTEs.展开更多
文摘采用了一种全新的方法对金属陶瓷发热体的电阻温度系数(Temperature Coefficient of Resistance,TCR)进行检测。该法利用外加电源对发热体进行动态升温,并连续监测发热体的温度和阻值变化,通过最小二乘法拟合电阻-温度数据,进行数学计算得到TCR值。研究进一步分析了影响检测稳定性的因素,包括红外聚焦方法、测温点位置、连接点位置及输出电压的选择,并验证了新方法测得的数据准确性与重复性。结果表明,新方法与国标法测试结果基本一致,但具有检测时间短、检测限高、检测数据点多等优势,适用于快速批量测试金属陶瓷发热体的TCR值。
文摘The competitiveness of the small gas turbine units (GTUs) (Ne<300 kW) in the world power market is dependent on bath the maintenance expenses and the capital costs of production. Reduction in the maintenance expenditures could be achieved by increasing the plant efficiency. This task could be solved by some methods: increasing the cycle inlet temperature TIT, getting the cycle more complex (use of heat regeneration and compressed air intermediate cooling), cutting the power consumption on heat-stressed parts cooling. Putting the above into effect is linked with introduction of novel structural materials, a sharp increase in the mass-size values and the plant manufacture expenditures, in particular, at provision of its self-regulation. In connection with the above, the development of the combined metal-ceramic airheaters and standardization of the elemental basis of the metal gas-gas heat exchangers will promote reduction in the expenditures of the maintenance and the manufacture of the small-size independent power GTEs.
