Low conductivity water loop heat pump study at Lawrence Livermore National Laboratory

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:170392

Chen, C C; Onu, C ^[1]; Smith, T; Holda, M ^[2]

---

1. Southern Univ., Baton Rouge, LA (United States). College of Engineering
2. Lawrence Livermore National Lab., CA (United States)

Based on results of the new Water Source Heat Pump (WSHP) systems operating in the US, these highly efficient heat pumps provide energy saving that will make them economically feasible to replace the inefficient, conventional HVAC systems. Additionally, an option to replace a centrifugal-compressor CFC chiller with a non-CFC chiller can be to replace the system with a highly efficient Water-Loop Heat Pump (WSHP) system. This replacement can result in a reduction of 20 to 30% in heating and air-conditioning energy costs. Low Conductivity Water (LCW) is purified water used for cooling in experimental laboratory, process, and air-conditioning equipment. It is one of several lab-wide mechanical utilities systems provided at Lawrence Livermore National Laboratory (LNL). The system is designed to maintain a supply temperature between 65 F and 85 F, with 100 psi at the inlet of the user building, 50--55 psi minimum differential pressures in the building, 35 psi maximum return pressure, and 0.4 umho/cm conductivity. However, this study is to utilize the existing LCW water loop to achieve the energy-efficiency improvement in a water resource heat pump (WRHP) system. The study will also utilize the life cycle costs as a tool to as the general selected criteria.

• OSTI ID: 170392
• Report Number(s): CONF-950729--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AIR CONDITIONERS
COMPUTERIZED SIMULATION
COOLING SYSTEMS
DESIGN
LABORATORIES
LIFE-CYCLE COST
WATER SOURCE HEAT PUMPS