（πR）最大时卡诺制冷机的利润率和制冷率

将利润率与制冷率结合在一齐，并以（πR）为目标函数，讨论了卡诺制冷机综合性能的优化，导出了（πR）最大时内可逆卡诺冷机的利润率和制冷率，所得结果对实践有一定的指导意义和参考价值。     

吉拉克凝析气田地面工艺技术

吉拉克气田位于新疆轮台县境内，是中国石油塔里木油田分公司早期发现的高压、高产凝析气田，油气资源比较丰富，是“西气东输”工程的主要气源之一。在概述吉拉克凝析气田地面工程基本情况的基础上，详细介绍了凝析气的集输工艺、制冷回收轻烃和凝析油稳定工艺，并列出了单位能耗指标。经过多方案比较最终确定：①集气部分采用适当高压保温集输或加热节流后集输进站，合理利用压力能可以保证站内凝析气处理时最大限度的节能；②石炭系和三叠系凝析气采用分别处理的生产工艺；③合理确定丙烷收率为85%，既有良好的经济效益又可节约能源。该工程于2005年5月1～9日一次投产成功，已创造了可观的经济和社会效益。     

Analysis on energy saving potential of integrated supermarket HVAC and refrigeration systems using multiple subcoolers

The paper presents a model-based analysis on the energy saving potential of supermarket HVAC (heating, ventilating, and air-conditioning) and refrigeration systems using multiple subcoolers among the high-temperature HVAC system, the medium-temperature refrigeration system, and the low-temperature refrigeration system. The principle of energy reduction is to have the higher COP (coefficient of performance) system generate more cooling capacity to increase the cooling capacity or reduce the power consumption of the lower COP system. The subcooler could be placed between the medium-temperature and low-temperature systems, between the high-temperature and medium-temperature systems, and between the high-temperature and low-temperature systems. All integration scenarios of adding one, two and three subcoolers have been investigated. The energy saving potential varies with the load ratio between high-, medium- and low-temperature systems, COP of three systems, and the “on-off” duty time of HVAC system. The optimal sequence of adding subcoolers is also proposed.     

低海拔地区纺织空调的节能探索

在新疆吐鲁番低海拔地区纺织厂空调系统调节过程中，根据室外干湿球温度变化差异，分析了室外空气与车间回风的焓差变化，大量使用新风，降低空调冷负荷，实现充分利用自然能源，从而达到节能的目的。并总结出不改变制冷机工况实现大温差小水量的简单方法。     

利用黄原胶与魔芋精粉的协同增效作用研制低温冷冻果馅

应用黄原胶与魔芋精粉的协同增效作用 ,对低温 (- 2 0℃ )冷冻果馅 (添加天然果汁 )进行了研究 ,采用葡萄糖浆与黄原胶、魔芋精粉复合使用 ,在其抗析水性及抗冻性方面取得了良好效果。     

Thermoeconomic optimization of a shell and tube condenser using both genetic algorithm and particle swarm

This paper presents a thermoeconomic optimization of a shell and tube condenser, based on two new optimization methods, namely genetic and particle swarm (PS) algorithms. The procedure is selected to find the optimal total cost including investment and operation cost of the condenser. Initial cost includes condenser surface area and operational cost includes pump output power to overcome the pressure loss. Design parameters are tube number, number of tube pass, inlet and outlet tube diameters, tube pitch ratio and tube arrangements (30, 45, 60 and 90°). Therefore, shell diameter should be selected less than 7 m, tube length should be less than 15 m, and ratio of diameter to tube length should be in the range of 1/12 to 1/3. In addition, it is found that GA provides better results for computer CPU running time, compared to PS algorithm. Finally, a sensitivity analysis of design parameters at the optimal point is conducted. Results show that an increase in the tube number leads to decrease in the objective function first then it leads to a considerable increment in objective function.     

Adsorption Characteristic of Methanol in Activated Carbon Impregnated with Lithium Chloride

The amount of methanol adsorbed in composite sorbents made of activated carbon impregnated with two different mass fractions of LiCl were assessed at selected temperatures and pressures. The adsorbed amounts, temperature, and pressure were well correlated with a Langmuir‐type equation that had the same set of coefficients for different isotherms and isobars. However, sorption hysteresis was observed in the composite sorbent and the main practical implication of this phenomenon was the increase of the regeneration temperature necessary to desorb a certain amount of methanol. The specific cooling capacity and the coefficient of performance of the studied adsorbents were calculated, and it was found that the sorbent with 21.3 wt % of LiCl had specific cooling capacities 11 % to 31 % higher than those obtained with the untreated activated carbon, when the regeneration temperature was 388 K. The heat sink temperature was 303 K, and the evaporation temperature ranged between 263 and 283 K. However, at the same operation conditions, the coefficient of performance of both sorbents was similar.     

Thermoeconomic optimization of subcooled and superheated vapor compression refrigeration cycle

An exergy-based thermoeconomic optimization application is applied to a subcooled and superheated vapor compression refrigeration system. The advantage of using the exergy method of thermoeconomic optimization is that various elements of the system—i.e., condenser, evaporator, subcooling and superheating heat exchangers—can be optimized on their own. The application consists of determining the optimum heat exchanger areas with the corresponding optimum subcooling and superheating temperatures. A cost function is specified for the optimum conditions. All calculations are made for three refrigerants: R22, R134a, and R407c. Thermodynamic properties of refrigerants are formulated using the Artificial Neural Network methodology.     

阀片机械颤振对制冷吸气充量的影响

本文通过制冷压缩机的气阀阀板运动的数学模拟过程计算和与之相对应的实验结果对比分析表明 ;阀板的开度 (挠度 )、厚度及预弯量等技术结构参数的大小会引发气阀的机械颤振。这种机械颤振会严重地影响压缩机吸气过程的充量甚至阀片失效。为此 ,本文对阀片的厚度和预弯量进行优化选择计算并给出优化计算结果。本文的阀片运动数学模拟的设计程序可提供给有关企业使用。     

液氩冷量回收技术

文章主要介绍液氩冷量回收装置的原理、流程及操作要点。将原来散失在大气中的冷量进行回收 ,用来液化氧气和液氩贮罐中保温不好而汽化的氩气 ,以增加液体产量 ,具有可观的经济效益。