集合住宅揚水系統能源成本效率評估法

Energy Budget Efficiency Evaluation Method forPumping System of Condominium Housing

本文仿ASHRAE空調統的能源成本評估法，提出揚水泵能源成本效率PEB評估法，以作為內政部建築研究所的住宅建築能效評估系統R-BERS中的揚水系統節能評估工具。PEB評估法並非直接以水泵功率換算耗電量的方法，而是一種評估包含流動電費與契約電費的最低總用電成本之評估法。基於集合住宅大樓100台揚水泵設備實測，本研究發現目前的揚水量設計市場有51%的揚水量設計超量設計2倍以上，有78%的揚程設計超量設計5%以上。鑑於此超量設計現況已經引發大量無謂的揚水用電成本上升，本研究深信推動合理最小水泵功率設計的策略才是改善揚水系統浪費能源現況的關鍵政策。由於台灣現有自來水法令均規定揚水管徑、揚水泵、水塔揚必須限制於一日至兩日設計用水量之範圍來設計，因此PEB法以法令要求最低揚水量與揚程之兩倍乘積作為選用揚水泵最大值，同時以既有80個揚水泵實測揚水耗電密度危險率99%之最大值之揚水耗電密度PED0.0183kWh/（m.m3），來建立揚水泵能源成本之評估公式。PEB法同時能給予高效率揚水泵設計較佳評估，有助於目前政府正積極推動的高效率揚水泵政策，亦可為總體建築揚水設備市場節約大量能源與電費。

Based on ASHRAE’s Energy Budget Efficiency method of air condition system, this paper proposed the PEB(Pumping Energy Budget Efficiency) method as an energy evaluation tool for ABRI’s Building Energy Efficiency Rating System of Residential Buildings. Without using pumping power calculate method directly, PEB is a method to evaluate the lowest total electricity budget including electricity charge and demand charge. Based on the field measurement of 100 pumps, this research fund that 51%pumping capacity designs were over designed more than twice and 78%pumping head designs were over designed more than 5% in today’s pumping design market. Because such an over designed phenomenon had increased unnecessary huge pumping electricity budget, this research believed that to promote an appropriate minimum pumping power design strategy is the key policy to improve the energy wastage situation of building pump system. Because the capacity of water piping, pump, water tower have to be designed between one day water usage and two day water usage according to the existing regulations of Water Corporations, PEB method suggesting a maximum pump value with twice product value of pump head and pumping capacity design and using a maximum pumping electricity density 0.0183kWh/(m.m3) which is a maximum electricity density from 80measured pumps with 99% risk ratio to established an evaluation method for pumping energy budget. PEB method can also give a higher evaluation for better efficiency pump design so as to help the governmental promotion policy of high efficiency pump design and to save huge energy and electricity budget for the whole pump equipment market.