Comparison of Various Models Heat Pump Water Heater Price

Posted by vivek choudhary on April 13th, 2021

To mitigate global warming and the energy crisis and achieve energy efficiency, it is of paramount importance to use renewable energy technologies that can provide optimum and cost-effective energy savings. The research focused on the identification of critical parameters (volume of hot water drew off, ambient temperature, relative humidity, refrigerant temperatures at the inlet and outlet of the compressor and condenser) and deterministic quantities (time used, power consumption, and coefficient of performance (COP)) as indicators to benchmark the performance of both the split and integrated types air source heat pump water heater.

The analysis was performed based on two predominant scenarios (first-hour heating rating and the heating cycle due to the controlled volume of hot water drew off) wherein both the integrated and split types domestic heat pump water heater were undergoing vapor compression refrigeration cycles (VCRC). A data acquisition system was constructed and implemented to monitor the performance of both systems.

The results obtained during the summer season showed that under the scenario of 150 L hot water withdrawal, the average COP of the two systems was 3.18 and 2.85 for the split and integrated types. The average power consumed was 1.29 kW and 0.85 kW for the split and integrated types systems, while the time of operation was 84 minutes and 138 minutes, respectively.

Comparing the most common residential water heating technologies was performed to determine the most energy-efficient and cost-effective water heating technologies when subjected to a variety of typical operating conditions. To perform this comparison, models of different water heaters were used to determine each water heating technology's energy consumption.

Several available buy heat pump water heaters were used and created new condensing and heat pump water heaters specifically for this work. Gas storage, gas tankless, condensing storage, electric storage, heat pump, and solar water heaters were simulated in several climates across the United States, installed in conditioned and unconditioned spaces, and subjected to low, medium, and high use draw profiles.

In each case modeled here, simulated the whole house and the water heater to capture any interactions between the water heater and the space conditioning equipment. Home models were based on Building America Benchmark homes to reflect typical new construction homes and varied based on location to reflect local building practices. Six locations, each representing a Building America climate zone, were chosen.

Space heating equipment was chosen such that homes with gas water heaters used gas for space heating and those with electric water heaters used electricity for space heating. Thus, gas and electric water heaters are not directly compared here. However, we made all energy comparisons on a source energy basis to capture the differences in primary energy consumption associated with these fuel types.

For heat pump water heater price, solar was usually the most efficient technology. However, HPWHs were the most energy-efficient technology in several scenarios. Typically, HPWHs provided higher energy savings than solar water heaters in the higher use cases in conditioned spaces in colder climates. In these cases, the HPWHs got a performance increase from the warmer ambient air temperature in conditioned space, larger than the space heating penalty imposed by the HPWH. The solar resource in these locations is also relatively low, so HPWHs used slightly less energy than solar water heaters. The solar resource is small enough that HPWHs could save slightly more energy than solar water heaters in unconditioned spaces.