The characteristics of urban untreated sewage source and urban untreated sewage source heat pump are analyzed and studied.
分析探讨了城市原生污水源的特点及其热泵系统的优缺点。
According to the characteristics of technology and economy of city untreated sewage source heat pump system, the mathematical models of annual cost object function are established.
根据现有城市原生污水源热泵的技术经济特点，以系统的费用年值为目标函数，建立了系统综合优化的数学模型。
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