Yupu Lu

Adsorption cold storage system with zeolite–water working pair used for locomotive air conditioning

Abstract Adsorption cold storage has lately attracted attention for its large storage capacity and zero cold energy loss during the storing process. Thermodynamic and experimental studies on the cold storage capacity and the cold discharging process, in which the adsorber is either air cooled or adiabatic, have been presented. An adsorption cold storage system with zeolite–water working pair has been developed, and some operating results are summarized. This system is used for providing air conditioning for the driver’s cab of an internal combustion locomotive. Unlike a normal adsorption air conditioner, the system starts running with the adsorption process, during which the cold energy stored is discharged, and ends running with the generation process. The adsorbent temperature decreases during the cold storing period between two runs. The refrigeration power output for the whole running cycle is about 4.1 kW. It appears that such a system is quite energetically efficient and is comparatively suitable for providing discontinuous refrigeration capacity when powered by low grade thermal energy, such as industrial exhausted heat or solar energy.

Experimental investigations on adsorption air-conditioner used in internal-combustion locomotive driver-cabin

An internal-combustion locomotive driver-cabin adsorption air-conditioner is a new type of space cooling system, which employs zeolite-water as working pairs and is driven by the waste heat from the exhaust gas of internal-combustion engines. Experiment methodology of this air-conditioner is presented and the results and their impact factors are discussed. Refrigeration output performances under adiabatic and cooling conditions are analyzed as well.

Locomotive driver cabin adsorption air-conditioner

Drivers can easily feel fatigue and aprosexia due to the high temperature inside the locomotive driver cabin in summer. The current locomotive driver cabin air-conditioning system cannot meet the needs of operating condition and environmental protection. It is a very urgent task to develop an air-conditioning system which is suitable for application in internal combustion engine locomotive driver cabin.

Investigation of a novel combined cycle of solar powered adsorption¿ejection refrigeration system

A novel model of the combined cycle of a solar-powered adsorption–ejection refrigeration system (CCSPAERS) is established. By analyzing the theory of this system and its thermodynamics, together with numerical simulation, it is found that it is a feasible method to overcome the intermittent character of a single bed solar adsorption refrigeration system. The estimated coefficient of performance for this combined cycle is about 0.4 under the following operating conditions: condensing temperature 313 K, evaporating temperature 283 K, regenerating temperature 393 K and desorbing temperature 473 K, using zeolite 13X–water as the pair. The higher desorbing temperature can be obtained when a vacuumed tube adsorber or a CPC adsorber is used.

Performance of a Diesel Locomotive Waste-Heat-Powered Adsorption Air Conditioning System

An innovative exhausted-heat-powered solid adsorption air conditioning system with zeolite-water as working pair is designed for providing air-conditioning for the drivers cab of a diesel locomotive. Only one adsorber is used in the system and a cold storage water tank is attached to provide cooling during generation process to ensure the continuous cooling output. Experiments on the laboratory prototype have been carried out and a mean cooling power output of about 3.3 kW is obtained when the condensing temperature and the evaporating temperature are 40°C and 7°C respectively. The influences of some operating conditions on the system performance are analyzed by simulation and experiments. The results of the performance testing of the prototype installed in a diesel locomotive are also discussed as well. An average cooling power of 4.1 kW is got under typical summer condition. It is proved that such a system is quite competitive even if a little bit heavier.