Experimental Research And Analysis On A Moveable Miniature CCHP System

Based on the I.C. engine, the miniature CCHP (Combined cooling, heating and power) system enjoys the merits of good economic efficiency, moveable, flexibility and easy adaptability. The moveable miniature CCHP (MMCCHP) system which is a new small-scaled CCHP system and it is well known as the technology of sufficient utilization of low-grade thermal energy with the principle of thermal cascading. The system itself is attracting more and more attentions both from abroad and in China nowadays. By highly packing three major parts together (I.C. engine, small-scaled adsorption chiller and thermal management controller), The MMCCHP system is characterized by multi-heat sources/outputs in combination with jacket water and exhaust gas from I.C. engine, through thermal management controller, the heat from I.C. engine is contributed to either multi heat users in winter or adsorption chiller to produce cooling load of 10kW. By studying the experiment data and building up the mathematic simulation models of the major parts in the MMCCHP system, the operational characteristics and system stability are analyzed in this paper. Also, with the date from the experiment and practical factory manual books, the system efficiency and economical efficiency are both studied. The major works done in this paper include:1. By high packing and modularizing I.C. engine, small-scaled adsorption chiller and thermal management controller, the MMCCHP system is built up with the output of 16kW electricity, 10kW cooling load and 33kW heating load. The system can be adjusted into three different models to adapt to different seasons in one year: summer model with power, cooling and heating output, winter model with power and heating output and spring/autumn model with hot water output. The overall efficiency of the MMCCHP system is 74% with the electricity efficiency of 23% and heat recovery efficiency of over 84%.2. Based on the experiment research and reference on the small-scaled adsorption chiller and thermal management controller models, the semi-theoretical and semi-empirical mathematical model for I.C. engine is proposed. The models are used to predict the performances and efficiency of the MMCCHP system. The simulation results, with real operating parameters as the input to the models, are compared with the experimental data, therefore the results from experiment have a theoretical foundation for optimum operation and analysis of the MMCCHP system.3. With the experimental data and simulation results, the economical efficiency and optimum operational strategy of the MMCCHP system are presented and studied in chapter 5. Based on the results, the conclusions are reached as the system is with best performance and economical efficiency when used in small-scaled hotels or other small-scaled commercial fields.This paper provides the fundamental experiment data and research on MMCCHP system, with the systematic experimental study of the MMCCHP system, the ultimate aim is to develop the integrated manufacturing miniature CCHP system and to speed up the commercialization of the system in the future.