Residential computer usage patterns in Japan and associated life cycle energy use

E. Williams, Taku Hatanaka
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引用次数: 31

Abstract

Computer purchase, operation and disposition patterns are characterized via a survey of about 1,000 Japanese residential users. The mains purposes are a) to better characterize the energy burden of the national IT infrastructure and b) to understand the status and prospects of the market for used equipment. Results include that the average length between buying new PCs in is 2.9 years, older computers typically spend 2.8 years unused in closets before next disposition (donation, recycling, or other). These and other results are used to estimate that annual life cycle energy burden of home PCs in Japan is 9.7 /spl times/ 10/sup 10/ megajoules (MJ), 0.64% of total energy demand. Considering prospects for the used market, apparently there is a large untapped potential supply of used computers: only about 13% of users reported having sold or purchased a used PC, and 55% said that they had never considered selling a computer. There is likely a "hole" in the supply of mid-level used PCs (2-4 years old), with high-end ones (1-2 years old) being sold by power users buying new machines, and low-end ones (5-6 year) coming from storage. Potential demand is less promising: users report many concerns about purchasing used computers, such as warranties, reliability, and desire to have "my own" computer. There is likely much higher demand for used PCs in neighboring countries in developing Asia. Prompt reselling of used computers by Japanese users could potentially open a door to supplying inexpensive, quality computers for the export market.
日本住宅电脑使用模式及相关生命周期能源使用
通过对约1000名日本居民用户的调查,描述了电脑的购买、操作和配置模式。主要目的是:a)更好地描述国家信息技术基础设施的能源负担;b)了解二手设备市场的现状和前景。结果显示,购买新电脑的平均间隔时间为2.9年,而旧电脑在下一次处理(捐赠、回收或其他)之前通常会在壁橱里闲置2.8年。这些结果和其他结果被用来估计日本家用pc的年生命周期能源负担为9.7 /spl倍/ 10/sup 10/兆焦耳(MJ),占总能源需求的0.64%。考虑到二手电脑市场的前景,显然有大量未开发的潜在二手电脑供应:只有大约13%的用户报告说他们出售或购买过二手电脑,55%的人说他们从未考虑过出售电脑。中档二手电脑(2-4年)的供应可能存在“漏洞”,高端电脑(1-2年)由高级用户购买新机器出售,低端电脑(5-6年)来自存储。潜在的需求则不太乐观:用户报告了购买二手电脑的许多顾虑,比如保修期、可靠性,以及希望拥有“我自己的”电脑。亚洲发展中邻国对二手个人电脑的需求可能会高得多。日本用户及时转售二手电脑,可能为向出口市场供应物美价廉的电脑打开一扇大门。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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