Abstract
In this paper, the performance of a three-bed (equal bed) adsorption chiller with mass recovery has been numerically studied. The mass recovery scheme is used to improve the cooling effect and a CFC-free-based sorption chiller driven by the low-grade waste heat or any renewable energy source can be developed for the next generation of refrigeration. Silica gel/water is taken as adsorbent/adsorbate pair for the present chiller. The three-bed adsorption chiller comprises with three adsorber/desorber heat exchanger, one evaporator and one condenser. In the present numerical solution, the heat source temperature variation is taken from 500C to 650C along with coolant inlet temperature at 300C and the chilled water inlet temperature at 140C. In the new strategy, mass recovery process occurs in all beds. The configuration of beds in the three bed chiller with mass recovery were taken as uniform in size. The cycle simulation calculation indicates that the COP value of the three-bed adsorption chiller with mass recovery is 0.6214 with a driven heat source temperature at 65°C in combination with coolant inlet and chilled water inlet temperatures at 30°C and 14°C, respectively.
Highlights
Most of the advanced cycles in adsorption refrigeration/heat pump are proposed to achieve high Coefficient of Performance (COP) and/or Cooling Capacity (CC) values
A novel adsorption chiller, namely, “Three bed adsorption chiller” is investigated by Saha et al [5] and shown that waste heat recovery efficiency of the three-bed system is about 35% higher than that of the two-bed system
T T hot,in cool,in dt Results and Discussion In the present analysis, a cycle simulation computer program is developed to predict the performance of the three-bed chiller with mass recovery
Summary
Most of the advanced cycles in adsorption refrigeration/heat pump are proposed to achieve high Coefficient of Performance (COP) and/or Cooling Capacity (CC) values. Saha et al [1] proposed two-stage chiller where the driving heat source temperature was validated experimentally. A two-stage silica gelwater adsorption refrigeration cycle can exploit the heat source of temperature around 600C with the cooling source at 300C. Khan et al [2] studied the performance investigation on mass recovery threebed adsorption cycle. Khan et al [3] proposed and investigated numerically the advanced three-bed adsorption chiller employing mass recovery scheme. Saha et al [4] studied waste heat driven dual-mode, multi-stage, multi-bed regenerative adsorption system. A novel adsorption chiller, namely, “Three bed adsorption chiller” is investigated by Saha et al [5] and shown that waste heat recovery efficiency of the three-bed system is about 35% higher than that of the two-bed system
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