摘要：当今社会，能源与环境问题日益成为社会关注的焦点。北方一般家庭冬季取暖大多采用燃煤炉，燃煤取暖效率较低，燃煤废气又基本不经处理排入大气。这种取暖方式效率低又污染环境，因此急需一种新的方式将其取缔。在今年的中央领导财经会议上，将“推进北方清洁取暖”放在民生大事的首位。

空气源热泵技术作为一种新的取暖方式越来越受到广大学者的关注，但是在向北方等地推广时却暴露出了低温工况下制热效能偏低等问题。本文将对空气源热泵系统展开研究，包括：热泵工作原理、模拟工况进行空气源热泵取暖系统设计、冷凝器设计以及针对低温运行下机组问题的探讨等。设计结果通过设计图和计算表格进行说明。

关键词  煤改电  空气源热泵  工作原理  地暖系统  

毕业设计说明书外文摘要

Title    Design of Small and Medium-sized Coal to Electricity   Heating System

Abstract：In today’s society,energy and environmental issues are increasingly becoming the focus of social concern.Most of the northern general family heating mostly use coal-fired stove in winter.Coal-fired heating efficiency is low and the waste gas are basically without treatment into the atmosphere. This heating method is inefficient and pollutes the environment,so it is in urgent need of a new way to ban it. At this year’s central leadership finance conference ,President Xi Jinping put “the North heating cleaner”on the first place in the people’s livelihood.

  Air to air heat pump has been paid more and more attention by the majority of scholars as a new way of heating. But the problem that heating efficiency is low when working in the low temperature conditions is exposed when we promote to the north and other places.So in this paper , air source heat pump will be studied,including:heat pump working principle,the heat pump system design in the simulation conditions, condenser design and discussion on the problem of the heat pump under low temperature operation.The design results are illustrated through the design diagram and calculation form to show.

Keywords  Coal to electricity  Air to air heat pump  Working principle  Underfloor heating system

目   次

1  引言 1

2  空气源热泵地暖系统工作原理… 2

 2.1  空气源热泵系统简介  2

 2.1  空气源热泵系统的构成 … 2

3  空气源热泵地暖系统的设计  4

 3.1  对采暖方式的分析  4

 3.2  热泵系统实际循环 … 5

4  空气源热泵地暖系统设计计算 … 6

 4.1  空气源热泵地暖系统运行工况 … 6

 4.2  空气源热泵地暖系统设计计算 … 6

5  设计计算中发现的问题与解决方法  13

 5.1  低温运行下系统内部问题  13

 5.2  低温运行下系统外部问题 …13

 5.3  从制冷剂方面的考虑 …14

结论 15

致谢 16

参考文献…17

附录A  设计图 18

附录B  设计计算表 21

图1  空气源热泵地暖系统示意图…18

图2  冷凝器示意图…19

图3  膨胀阀示意图…20

图4  蒸发器示意图…21

图5  压缩机示意图…22

图6  地暖管路示意图23

图7  水泵示意图24

表1  空气源热泵热力学计算表25

表2  冷凝器设计计算表…27

1  引言

当今社会，能源需求日益高涨，但能源储量却越来越匮乏，这一矛盾了受到社会的广泛关注；而能源的主要来源却主要是化石能源。众所周知，伴随着化石能源消耗，不可避免的要产生对环境的污染。可以说能源与环境已经成为了当今社会一个鲜明的主题。