【作者】 胡张保；

【导师】 张百良； 王乐轩； 张宪坤；

【作者基本信息】 河南农业大学 ， 农业生物环境与能源工程， 2005， 硕士

【摘要】 随着人民生活水平的提高,家用空调和生活热水已成为现代人居环境中不可缺少的部分,通常是分别购买两套设备,即家用空调机组和热水器。这两套设备在实际运行中不仅浪费能源,而且造成严重的环境热污染,存在着矛盾,也不符合可持续发展的要求。本论文在这种背景下,创造性地研究和开发出了带热水供应的小型地下水源热泵中央空调机组,该机组可以实现一机多功能——供冷、供暖、供热水,不仅具有丰厚的经济效益,而且具有良好的环境效益。 本文对所研制的样机进行了理论分析和试验研究,并取得了阶段性的成果,主要有以下几个方面: （1） 采用焓分析法和（火用）分析法分别对地下水源制冷工况与地下水源制热工况进行了理论分析,计算出了理论上样机的性能系数、热力完善度、（火用）效率以及冷凝器、压缩机、蒸发器和节流阀的（火用）损失,为样机的改进和试验提供依据; （2） 在近标准工况、地下水源制冷工况和地下水源制热工况下,分别对样机进行了性能试验,结果表明:样机运行稳定、性能良好; （3） 在地下水源制冷兼制热水模式和地下水源制热兼制热水模式下,本文进行了冷凝热回收制备热水对机组影响的试验研究,每种模式又分为内置热水箱中水为静态和内置热水箱与外置热水箱循环加热热水两种情况。在试验过程中,对每种情况下机组的高压部分、低压部分以及水系统进行了测试,并详细总结出了各参数的变化规律以及对样机性能的影响,结果表明:在制冷工况下回收冷凝热制热水对机组的影响很小,而在制热工况下制备热水对机组有不容忽视的影响。此外,在单独制热水模式下本文也进行了冷凝热回收制备热水对机组影响的试验研究,对机组的高压部分、低压部分以及水系统进行了测试,并详细总结出了各参数的变化规律,结果表明:在单独制热水模式下空调机组的各个参数均处在动态变化中; （4） 本文通过试验确定了内置热回收水箱套管式换热器的传热系数K:内套管K=150.2⊿T^0.5547,外套管K=19.1⊿T^0.7171,此模型可作为其它机型热回收水箱的设计依据。由内置热水箱的保温试验得出:热损系数U_L=4.57W/m²·K,时间常数τ_C=20.33h,温位方程θ=42.4e^τ/20.33K,保温率方程η_B=e^τ/20.33,保温层能够满足保温要求; （5） 本文对所设计的5种技术方案采用价值工程的方法进行了评价,结果表明:采用本文小型三功能地下水源热泵中央空调机组供冷、供暖及供生活热水的方案为最优方案。更多还原

【Abstract】 With the development of the people’s living standard, household air-conditioner and hot water have become an indispensable part in our daily life. We usually have to buy two units separately, household air-conditioner and water heater. When the two units work they not only waste energy but also cause serious environmental heat pollution, and contradiction exists between them. This system don’t meet the requirement of the sustainable development .So this paper designs and studies the small scale GWHP central air-conditioning unit with hot water supply, this unit has three functions-cold supply, heat supply and hot water supply. The unit will bring us both economic benefits and environmental benefits.This paper has made the theoretical analysis and experimental study on the sample unit ,and draws some conclusion as follow:(1) Groundwater-source refrigeration operating mode and Groundwater-source heat operating mode are analysed theoretically by means of enthalpy analysis and exergy analysis, Calculating out the performance coefficient , finishing degree of heating power , exergy efficiency of sample unit and the exergy loss of condenser compressor , evaporator and expander, then offering the basis for improvement and test of the sample unit;(2) Under standard mode, Groundwater-source refrigeration operating mode and Groundwater-source heat operating mode, carrying on performance test to the sample unit respectively, the result shows: The sample unit operates stably, performance are good;(3) Under refrigeration operating and hot water supply mode and heat operating and hot water supply modes, this paper has carried on the experimental study on the influence of condensing heat recovery for hot water, each mode is divided into two kinds of situations to heat hot water , water in inside tank is in static behavior and water in inside tank circulates with water in outside tank .In the course of testing, high-pressure system , low- pressure system and water system have been tested under each kind of situation, and summarizing the change law of every parameter and impact on performance of sample unit in detail, the result shows :Condensing heat recovery for hot water has little impact on sample unit under refrigeration operating mode, but the impact on unit can’t be ignored under heat operating mode .In addition, under single hot water supply mode this paper also has carried on the experimental study on the influence of condensing heat recovery for hot water , high-pressure system , low- pressure system of the unit and water system have been tested ,and summarizing the change law of every parameter in detail, the result shows : Each parameter of the air-conditioning unit is in the dynamic change under single hot water supply mode;(4) This paper confirms heat transfer coefficient K of the sleeve pipe type heat exchanger of the inside hot water tank through the test: Interior sleeve pipe K =150.2 △T~0.5547, exterior sleeve pipe K =19.1 △T~0.7171, this two models can be used to design the condensing heat recovery water tank of other unit types. The warm - keeping test of the inside hot water tank更多还原