According to the specific situation of a general hospital project, this paper analyzes the feasibility of the application of ground source heat pump air conditioning in the project from the conditions, one-time invest...According to the specific situation of a general hospital project, this paper analyzes the feasibility of the application of ground source heat pump air conditioning in the project from the conditions, one-time investment, energy consumption and operating costs of the implementation of ground source heat pump air conditioning, and comprehensively expounds several important technical measures of the implementation of ground source heat pump air conditioning. Combined with the characteristics of this project, the operation strategies of ground source heat pump air conditioning system under summer cooling condition, winter heating condition and over season condition are designed and put forward to ensure that the ground source heat pump air conditioning system can achieve the expected design effect and energy saving and emission reduction benefits.展开更多
The relationship among the hydrogen storage properties, cycling characteristics and thermal parameters of the metal hydride air conditioning systems was investigated. Based on a new alloy selection model, three pairs ...The relationship among the hydrogen storage properties, cycling characteristics and thermal parameters of the metal hydride air conditioning systems was investigated. Based on a new alloy selection model, three pairs of hydrogen storage alloys, LaNi_ 4.4 Mn_ 0.26 Al_ 0.34 / La_ 0.6 Nd_ 0.4 Ni_ 4.8 Mn_ 0.2 Cu_ 0.1 ,LaNi_ 4.61 Mn_ 0.26 Al_ 0.13 /La_ 0.6 Nd_ 0.4 Ni_ 4.8 Mn_ 0.2 Cu_ 0.1 and LaNi_ 4.61 Mn_ 0.26 Al_ 0.13 /La_ 0.6 Y_ 0.4 Ni_ 4.8 Mn_ 0.2 , were selected as the working materials for the metal hydride air conditioning system. Studies on the factors affecting the COP of the system showed that higher COP and available hydrogen content need the proper operating temperature and cycling time,large hydrogen storage capacity, flat plateau and small hysterisis of hydrogen alloys, proper original input hydrogen content and mass ratio of the pair of alloys. It also needs small weight, heat capacity and good heat conductivity of the reaction beds. An experimental metal hydride air-conditioning system was established by using LaNi_ 4.61 Mn_ 0.26 Al_ 0.13 /La_ 0.6 Y_ 0.4 Ni_ 4.8 Mn_ 0.2 alloys as the working materials, which showed that under the operating temperature of 180℃/40℃, a low temperature of 13℃ was reached, with COP =0.38 and W_ net =0.09 kW/kg.展开更多
In this paper, the properties and energy saving protential of a capacity control systemby varing the composition of a mixture has been analysized and experimented. The mixturesR22/142b, R32/124 and R32/134a have been ...In this paper, the properties and energy saving protential of a capacity control systemby varing the composition of a mixture has been analysized and experimented. The mixturesR22/142b, R32/124 and R32/134a have been proposed as the working fiuids to adjust thecapacity of the system with load change. The results show that if it is effective to control therefrigerant composition and capacities, the improvements for the seasonal energy efficiencyratio will be obtained.展开更多
文摘According to the specific situation of a general hospital project, this paper analyzes the feasibility of the application of ground source heat pump air conditioning in the project from the conditions, one-time investment, energy consumption and operating costs of the implementation of ground source heat pump air conditioning, and comprehensively expounds several important technical measures of the implementation of ground source heat pump air conditioning. Combined with the characteristics of this project, the operation strategies of ground source heat pump air conditioning system under summer cooling condition, winter heating condition and over season condition are designed and put forward to ensure that the ground source heat pump air conditioning system can achieve the expected design effect and energy saving and emission reduction benefits.
基金The Natural Science Foundation of China (50266063) .
文摘The relationship among the hydrogen storage properties, cycling characteristics and thermal parameters of the metal hydride air conditioning systems was investigated. Based on a new alloy selection model, three pairs of hydrogen storage alloys, LaNi_ 4.4 Mn_ 0.26 Al_ 0.34 / La_ 0.6 Nd_ 0.4 Ni_ 4.8 Mn_ 0.2 Cu_ 0.1 ,LaNi_ 4.61 Mn_ 0.26 Al_ 0.13 /La_ 0.6 Nd_ 0.4 Ni_ 4.8 Mn_ 0.2 Cu_ 0.1 and LaNi_ 4.61 Mn_ 0.26 Al_ 0.13 /La_ 0.6 Y_ 0.4 Ni_ 4.8 Mn_ 0.2 , were selected as the working materials for the metal hydride air conditioning system. Studies on the factors affecting the COP of the system showed that higher COP and available hydrogen content need the proper operating temperature and cycling time,large hydrogen storage capacity, flat plateau and small hysterisis of hydrogen alloys, proper original input hydrogen content and mass ratio of the pair of alloys. It also needs small weight, heat capacity and good heat conductivity of the reaction beds. An experimental metal hydride air-conditioning system was established by using LaNi_ 4.61 Mn_ 0.26 Al_ 0.13 /La_ 0.6 Y_ 0.4 Ni_ 4.8 Mn_ 0.2 alloys as the working materials, which showed that under the operating temperature of 180℃/40℃, a low temperature of 13℃ was reached, with COP =0.38 and W_ net =0.09 kW/kg.
文摘In this paper, the properties and energy saving protential of a capacity control systemby varing the composition of a mixture has been analysized and experimented. The mixturesR22/142b, R32/124 and R32/134a have been proposed as the working fiuids to adjust thecapacity of the system with load change. The results show that if it is effective to control therefrigerant composition and capacities, the improvements for the seasonal energy efficiencyratio will be obtained.
