Tao Zeng
Nagoya University, Japan
Title: Performance evaluation of mechanical booster pump-assisted adsorption chiller cycle
Biography
Biography: Tao Zeng
Abstract
Large amounts of waste heat below 100°C from the industrial sector are released into the atmosphere. The development of new technologies aiming to reduce problems related to energy consumption has become urgent. Adsorption chiller, as one of the heat energy conversion apparatus, can use low-temperature heat source of 60°C-100°C to generate the desired cooling effect for reducing air-conditioning loads. However, the adsorption chiller cycle still has a few problems in practical use; by reason of the cooling power per unit volume of the adsorber and the COP are smaller than that of absorption chiller or vapor compression chiller. To solve the problems associated with the adsorption chiller cycle, we proposed a hybrid adsorption chiller which contained a mechanical booster pump (MBP) in the adsorption process or desorption process. The objective of this study is to investigate the possibility to apply an MBP–assisted adsorption chiller cycle to improve and generate cooling power at a wider operational temperature range, such as operation at a waste heat temperature below 60°C or a lower evaporating temperature. The MBP was set either between the evaporator and the adsorber to increase the vapor pressure in the adsorber or between the adsorber and the condenser to decrease the vapor pressure in the adsorber. The results indicate that the increase of adsorber vapor pressure in the adsorption process contributed to a higher equilibrium adsorbed amount, and the decrease of adsorber vapor pressure in the desorption process resulted in a lower equilibrium adsorbed amount. The cooling heat output and the amount of cooling heat were improved and increased with the input electrical power of MBP.
