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Semi-open absorption water heater: experimental results.

Number: No 206

Author(s) : GLUESENKAMP K. R., KUMAR N., ABU-HEIBA A., PATEL V., YANG Z., BHAGWAT R., SANADHYA S., SCHMID M., RODE R., ANABTAWI B., MOGHADDAM S.

Summary

Absorption heat pumps are traditionally closed systems, while adsorption dehumidifiers are traditionally open systems. Recently a semi-open heat pump and dehumidifier has been proposed, in which ambient atmospheric humidity is absorbed into a solution, desorbed back to vapor in a desorber, condensed to liquid in a condenser, and released back to the ambient as a liquid. In this work, a semi-open sorption heat pump water heater was evaluated under the standard 24-hour duration test procedure used to evaluate water heaters in the US, the uniform energy factor (UEF) test. The results demonstrated that a cycle COP of 1.22 was achieved at air conditions of 19.7°C (67.5°F) and 50% relative humidity. Over the 24-hour period, the heat pump ran twice, with an average heating capacity of 0.825 kW, and an average cycle heating COP of 1.22. The standard load profile withdrew 209.6 L (55.4 gallons) from a 173.8 L (45.9 gallons) storage tank. The water supplied to the tank was 14.4°C (58°F) and the water withdrawn from the tank was always hotter than 45.3°C (113.5°F). 

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  • Original title: Semi-open absorption water heater: experimental results.
  • Record ID : 30030039
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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