本文提供了能源部/橡树岭国家实验室（DOE/ORNL）布朗热泵项目的最新信息。本文重点介绍了BR-105R所测得的性能系数（COP）值。2发动机/制冷剂压缩机，显著超过合同要求和之前报告的测量COP值。它描述了试验台和主要独立实验室进行的发动机效率试验的结果。本文还介绍了防止泵送制冷剂损失和污染的临界布朗密封的状态试验结果和选择方法。还提供了有关鉴定Braun BRI05R的信息。2天然气运行模式。单位:I-PCITION:研讨会，ASHRAE交易，1986年，第92卷，pt。2B，波特兰，或

This paper provides updated information on the Department of Energy/Oak Ridge National Laboratories (DOE/ORNL) Braun Heat Pump Program. This paper includes highlights of the measured Coefficients of Performance (COP) values achieved with the BR-105R.2 engine/refrigerant compressor, which significantly exceed contract requirements and measured COP values reported before. It describes the breadboard test rig and the results of corroborating engine efficiency tests performed by a major independent laboratory. This paper also addresses the status test results and selection methods of the critical Braun Hermetic Seal which prevents loss and contamination of the pumped refrigerant. Information is also supplied on qualifying the Braun BRI05R.2 model for operation with natural gas.Units: I-P