In this paper, a small-scale triple-hybrid air-conditioning system operated by biomass and solar energy resources is experimentally investigated. Comparisons with EnergyPlus simulations are also shown. Experiments reveal the necessity of system’s pull down because of inequality of heat transfer within the chiller. The biomass gasifier driving an electrical generator in combination with solar collector fulfils the total energy requirements that make the present system triple-hybrid in nature. An air-cooled lithium bromide–water operated absorption chiller of 4.06 kW rated capacity is fabricated and tested. The biomass-generated electricity enables to reduce the grid dependency of the system to fulfil net-zero-energy criterion. The system is tested under different generator temperature ranges (60 °C, 70 °C and 80 °C) and lithium bromide concentrations (54% and 58%) in water. With 54% concentration, this system operates up to 64.8% of nominal capacity with average coefficient of performance ranging between 0.14 and 0.19. However, with 58% concentration, up to 85.1% of its nominal capacity along with the coefficient of performance ranging between 0.19 and 0.25 can be acquired. The system caters the maximum load with the highest coefficient of performance of 0.34. Rise in the generator temperature improves the cooling capacity, coefficient of performance, shows quicker response of the system and drops the finally-attained room air temperature. Economic analysis reveals the payback time for the present system to lie in the range of 9–12 years. Finally, emission analysis reveals considerable possibility of greenhouse gas reduction in an affordable manner.

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中文翻译：

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基于生物质和太阳能的完全独立电网组合空调系统的实验研究

本文研究了一种由生物质和太阳能资源运行的小型三混合气空调系统。还显示了与EnergyPlus仿真的比较。实验表明，由于冷却器内部传热不均，系统必须下拉。驱动发电机与太阳能收集器结合的生物质气化炉满足使本系统本质上是三混合的总能量需求。制作并测试了额定容量为4.06 kW的风冷溴化锂水吸收式制冷机。生物质发电可以降低系统对电网的依赖性，从而满足零净能耗标准。该系统在不同的发电机温度范围（60°C，70°C和80°C）和水中的溴化锂浓度（54％和58％）。浓度为54％时，该系统的额定容量最高可达64.8％，平均性能系数在0.14至0.19之间。但是，浓度为58％时，可以获得其标称容量的85.1％，以及性能系数介于0.19和0.25之间的值。该系统以0.34的最高性能系数满足最大负载。发电机温度的升高提高了冷却能力，性能系数，显示了系统更快的响应，并降低了最终达到的室内空气温度。经济分析表明，本系统的投资回收期为9至12年。最后，

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