Four working fluids of R123, R141b, R245fa and R1234ze(Z) used in the high temperature heat pump cycle are analyzed and evaluated. Besides, the effects of evaporation temperature, injection ratio of the compressor and condensation temperature on the system performance are also discussed. The ...
ScienceDirect is phasing out support for older versions of Internet Explorer on Jan 12, 2016. For the best product experience, we recommend you upgrade to a newer version of IE or use a different browser: Firefox or Chrome. For additional information please see the ScienceDirect Blog page. ...
Adsorption heat pump (AHP) system has a big advantage in generating cold heat energy below 283 K for air conditioning by utilizing low temperature thermal energy below 353 K which is enormously discharged into atmosphere as waste heat. However, AHP system has a critical problem of low heat outp...
The system can work throughout the year and provide users with water at a required temperature. In winter, the Coefficient of Performance (COP) of the heat pump heater can reach a range of 2.1-2.5, while in summer it achieves around 2.61-2.95. 展开 关键词: fuzzy logic control energy ...
TE heat pumptemperature differencethermosiphonwater heaterExperiments verified that a thermoelectric heat pump system is more efficient than an electrical heating device, for its heating coefficient reached more than 1.6 with suitable operating conditions. Two novel instantaneous water heaters were developed ...
A magnetocaloric pump achieves this purpose by providing a pressure gradient of a ferrofluid placed inside a magnetic field while experiencing a temperature change. If the temperature change is produced by extracting heat out of an element that needs refrigeration, coupling this heat via a heat pipe...
A study of the applicability of a straw-fired batch boiler as a heat source for a small-scale cogeneration unit Using the prototype design of a system that collects high-temperature heat from the boiler, studies were performed. The studies involved an analysis of ... K Sornek,M Filipowicz ...
It is based on a high temperature heat pump cycle, which transforms electrical energy into thermal energy and stores it inside two thermal reservoirs, matched with a thermal engine cycle, which converts the stored thermal energy back into electrical energy. The thermal energy is stored as ...
Ammonia-water absorption-resorption heat pump (ARHP) is a promising technology for promoting efficient utilization of low-temperature thermal for space heating. This paper proposes a novel unbalanced ARHP cycle by replacing the condenser and evaporator in the conventional absorption heat pump (AHP) cycl...
It can be seen that, as compared to the conventional type, the heater brings a great reduction in the exhaust temperature and recovery of latent heat by installation of a secondary heat exchanger for recovery of latent heat. Because of the condensation of dew (pH 2 3) during recovery of ...