新型家用纯净水制备系统的产水特性及经济性分析

Water Production Characteristics and Economic Analysis of Novel Domestic Pure Water Preparation System

为解决目前家用膜过滤式纯净水机需要定期清洗和更换滤芯的弊病,本文基于增湿去湿(HDH原理和压缩制冷工作原理设计搭建了一种新型家用纯净水制备系统,在模拟全年运行工况(即不同的系统进水温度)下对该系统的产水特性进行测试,并进行经济性分析。结果表明:进水温度为15℃时,系统工作效率(即单位能耗纯净水产水量)最高,为1,996 g/(kW·h);较低的进水温度(5℃～10℃)可有效降低系统功耗;较高的进水温度(20℃～25℃)有利于提高纯净水产水量;系统纯净水产水量不低于580 g/L,脱盐率高达97%;与典型反渗透膜式净水器相比,本系统初投资较大,但运行费用大大降低,长期使用更具经济性。

In order to solve the problems of water purifier with membrane filtration, such as regular cleaning and filter replacement, a novel domestic water purification system is proposed in this paper based on humidification-dehumidification (HDH) principle and vapor compression refrigeration cycle. Experimental investigation and economic analysis have also been conducted under the simulated annual working conditions for different water inlet temperatures. The results shows that, as the water inlet temperature is 15 oC, the system working efficiency could get maximum of 1,996 kg/(kW·h);the energy consumption will reduce at lower water inlet temperature (5 ℃~10 ℃), while higher water inlet temperature (20 ℃~25 ℃) is beneficial to increase pure water production. The pure water production of system is not less than 580 g/h at different water inlet temperatures and the reduction ratio of the dissolved solid is up to 97%. In comparison to typical water purifier machine with reverse osmotic membrane, this system has higher initial investment but less operating expense, and it has better economy during the long-term usage.