设计和安装闭环地源热泵系统的人员必须了解适用的环境法规。美国超过一半的州都有规定，规定了闭环地源热泵系统地面回路周围可能使用的灌浆和/或灌浆技术。其他一些州的法规尚未出台。虽然所有这些法规都是基于保护地下水和含水层质量的需要，但在有具体要求的各州之间，灌浆和灌浆实践的清单差别很大。 可接受的典型灌浆包括高固体分膨润土和水泥。还可以指定放置技术，通常需要使用高压导管放置。所有州的法规状况都已确定。本文概述了这些法规，并概述了各州的担忧。单位:双引文:研讨会，ASHRAE交易，第106卷，pt。2.

It is necessary for those who design and install closed-loop ground-coupled heat pumps systems to be aware of applicable environmental regulations. Over half of the states in the United States have regulations specifying grouts and/or grouting techniques that may be used around the ground loop of a closed-loop ground-coupled heat pump system. A number of other states have regulations pending. While all of these regulations are based on the need to preserve groundwater and aquifer quality, the list of grouts and grouting practices varies greatly from state to state among those who have specific requirements. Typical grouts that are acceptable include high solids bentonite and cements. Placement techniques may also be specified, usually requiring placement by high-pressure tremie. The status of the regulations has been determined for all of the states. An overview of the regulations is presented, along with a summary of the states' concerns.Units: Dual