SBIR-STTR Award

Heat Pump Water Heater using Solid-State Energy Converters
Award last edited on: 5/20/2022

Sponsored Program
SBIR
Awarding Agency
DOE
Total Award Amount
$1,149,900
Award Phase
2
Solicitation Topic Code
03c
Principal Investigator
Uttam Ghoshal

Company Information

Sheetak Inc

4020 South Industrial Drive Suite 100
Austin, TX 78744
   (512) 413-8955
   info@sheetak.com
   www.sheetak.com
Location: Single
Congr. District: 35
County: Travis

Phase I

Contract Number: ----------
Start Date: ----    Completed: ----
Phase I year
2013
Phase I Amount
$149,950
Water heating is the second largest source of energy consumption in a household. Almost half of the homes in the United States use electricity to heat their water and all but a few use resistive heater based water heaters which consume a large amount of electricity. It is possible to use heat pumps to significantly reduce the power consumption of these water heaters but the existing technologies are often expensive and complex. In this work, Sheetak proposes to use its innovative and cost effective thin film thermoelectric modules as a solid-state heat pump with no moving parts. This can enable a significant improvement in energy efficiency of the water heaters without a significant increase in the product cost. As the end of this work, Sheetak expects to have a 50 gallon heat pump water heater design with cost of less than $500 and a COP of greater than 1.1. This product will also meet the spatial constraints of a traditional 50 gallon heat pump and will have a lifetime more than 10 years.

Phase II

Contract Number: ----------
Start Date: ----    Completed: ----
Phase II year
2014
Phase II Amount
$999,950
Water heating is the second largest source of energy consumption in a household. Almost half of them are electricity based which are quite inefficient. Current crop of heat pump water heaters are too expensive to make a meaningful impact on the situation. This is the overall objective of the combined Phase I and Phase II projects. We propose a new kind of heat pump water heater that is based upon solid state energy converters developed by Sheetak which can improve the heating efficiency of water heating by a factor of two with a very small increase in its price. A scaled down version of prototype was made to demonstrate the energy conservation aspect of the design. Component designs, suppliers, cost models were established. A full scale prototype will be delivered. It will be using Sheetaks thin film thermoelectric modules. The final product delivered will completely characterized and will be ready to go in commercial sales (i.e. reliability, design for manufacturing etc. will be established, working with our industrial partner). Commercial Applications and Other

Benefits:
If fully deployed in the US, it can save almost half of the electric power being consumed in the US household water heating. Furthermore, Sheetak has a plan to reach internationally and sell its US Made Thermoelectric module for application worldwide.