Solar-powered fridge off the grid

New design helps India’s villages cool food via a solar-powered refrigerator.

10/06/2008


A startup based in Cambridge, Mass., has developed a new solar-powered refrigeration system for food storage in Indian villages that are off the grid. Promethean Power Systems' design is a hybrid of conventional compressor-based refrigeration and thermoelectric materials--semiconductors that convert electricity into cooling and vice versa.

The chilling units will be cheaper than what is currently used in Indian villages, most of which are off the grid. In such villages, food distributors and processors store raw food products in traditional compressor-based cooling units that run on diesel generators. These cost about $12,000, says the company's cofounder Sorin Grama. And that cost, says Grama, doesn't include the escalating cost of diesel needed to run the units. During a month spent in India a year ago, Grama and his cofounder, Sam White, identified a crucial niche.

Grama says that even including the expense of the photovoltaic (PV) panels, his design would cost about the same as or slightly less than the diesel-powered refrigeration units. More important, it would have no fuel costs, and almost no maintenance costs. According to the company's initial calculations, using a compressor combined with thermoelectric modules would use 20% less power to generate the same cooling as a compressor alone.





No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
40 Under 40; Performance-based design; Clean agent fire suppression; NFPA 92; Future of commissioning; Successful project management principles
BIM coordination; MEP projects; NFPA 13; Data center Q&A; Networked lighting controls; 2017 Product of the Year finalists
Emergency lighting; NFPA 3 and 4; Integrated building systems; Smart lighting, HVAC design
Commissioning electrical systems; Designing emergency and standby generator systems; VFDs in high-performance buildings
Tying a microgrid to the smart grid; Paralleling generator systems; Previewing NEC 2017 changes
Driving motor efficiency; Preventing Arc Flash in mission critical facilities; Integrating alternative power and existing electrical systems
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me