

It is apparent that many previous studies have aimed at optimizing the collector side efficiency and comparing experimental and simulated performance. Optimum slope for the collector was evaluated to be 25°. Results revealed an operational efficiency of 61% for the solar collector and coefficient of performance (COP) of 0.69 for the absorption chiller. evaluated the performance of integrated solar hot water absorption cooling system for Ningbo, China, a subtropical location. The comparison between modeled and measured values of heat gathered by the collector showed mean absolute error in the range of 7 to 19%. Experimental study was carried out on both the systems. modeled a forced circulation solar water heating system with flat plate and heat pipe-based ETCs for the climate conditions of Dublin, Ireland. The system operated with maximum performance when the auxiliary boiler thermostat was set at 87☌. The collector area was determined by performing the life cycle analysis of the system. The model predicted an optimized system consisting of a 15-m 2 compound parabolic collector tilted at 30° from the horizontal and a 600-L hot water storage tank. modeled a solar absorption cooling system using TRNSYS for the local climate of Nicosia, Cyprus.
Solar thermal trnsys generator#
The study concluded that the increase in generator heat input from 20 to 30 kW increased the cooling capacity from 11.26 to 14.85 kW and slightly decreased the COP from 0.56 to 0.49. The chiller model was validated against experimental results obtained on a 12 kW absorption chiller and was further used to analyze the effect of important design and operating parameters on its performance. carried out simulation of a low-temperature gas-fired ammonia–water absorption chiller using TRNSYS. They found that the performance of the chiller was better in the year 2007 because the heat rejection temperature and the outdoor temperature were more favorable than those in 2008. conducted a two-year experimental analysis (20) to study the effect of outdoor temperature of Spain on the performance of LiBr–H 2O absorber cooling system. It was deduced that the simulation time steps should be lower than 1 h. This difference was attributed to steady state modeling, which did not consider the transient performance. The model predicted 30% lower energy consumption as compared with experimental results. simulated a hot-water-fired, double-effect LiBr–H 2O absorption system using TRNSYS and also validated the model with experimental data. The results showed that the minimum value of the required collector area was ∼57.6 m 2, which could supply the cooling loads for weather conditions of Ahwaz, Iran, in the month of July when the maximum load reached ∼17.5 kW.

simulated a parabolic trough collector-based absorption cooling system with LiBr–H 2O as absorbent refrigerant pair. The results showed that for a continuous operation, a 0.8-m 3 hot water storage tank is essential and the optimum design for a 3.5 kW (1 TR) system required 35-m 2 evacuated tube solar collector sloped at 20°. The simulation of the solar absorption cooling system was carried out using TRNSYS software. presented the simulation and optimization of a LiBr solar absorption cooling system with evacuated tube collectors (ETCs) for the local weather conditions of Malaysia. Ī number of simulation and experimental studies on various solar-powered absorption systems have been carried out by researchers to make this technology more competitive. A single-effect lithium bromide–water (LiBr–H 2O) absorption cooling system operates at a generator temperature in the range of 70 to 95☌ and requires water as cooling fluid in the absorber and the condenser. Vapor absorption is a mature technology that can be integrated with solar thermal collectors. In cooling applications, different types of sorption systems can be employed. The fact that cooling demand in summer is proportional to the availability of solar energy has been spurring the researchers to further exploit solar energy. Solar energy for cooling applications provides an opportunity to overcome this problem. The high electricity demand not only overloads the grid but harms the environment as well due to the burning of fossil fuels, which are the primary source of power. In tropical countries like India, which experience extreme summers in the mainland, demand for electricity shoots up due to the need for cooling.
