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Hybrid polymer fibre filter media are critical to the effectiveness of needle-punched nonwoven bag filters. We investigated the pyrolytic behaviour of hybrid filter media to analyze the contents of the components. The pyrolytic behaviour was investigated using pyrolysis-gas chromatography–mass spectrometry (Py-GC–MS). Pyrolysates were directly injected for GC–MS analysis. In total, 19, 22 and 23 compounds...
the prototype of dual-source heat pump water heater using air and water is assembled, and experimental research of performance is tested using air as heat source, respectively the ambient temperature is 7℃ and 20℃; water temperature of the prototype using water as heat source is respectively 15℃, 30℃. the results showed that the dual-source heat pump utilizes water source in the summer, utilizes air...
A new type of water-water multi-functional system consisting of double four-way valve is studied. System fundamentals and the operation modes are introduced. Experimental research on operation characteristics of refrigerating capacity, heating capacity, suction and discharge temperature and pressure shows that the unit operates reliably long in different operation conditions, and that the variation...
A single compressed and four-stage segregating auto-cascade refrigeration system was developed in this paper, the temperature of the liquid coolant in the tank with 5L could reach 150K. Cooling process after throttling was analyzed, and the effect of the different proportion of the refrigerants was also pointed out. Experimental results show that it takes nearly 4 hours and 12 minutes to realize the...
Air conditioning and hot water compound system in which air-cooling heat exchanger is connected with heat recovery heat exchanger in series is studied, system fundamentals and five running modes including single refrigerating mode, single heating mode, hot water mode, refrigerating and hot water mode and heating and hot water mode are introduced, and experimental research is developed. Experimental...
Aiming at developing metal hydride air-conditioning system driven by the waste heat of automobile engine coolant, the principle of metal hydride air-conditioning system was introduced and a hydride pair LaNi4.7Al0.3/LaNi5 was developed working at 363 K/303 K/283 K. the working cycle was described in detail. the values of characteristic parameters of the metal hydrides used in the system were also...
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