Archive for the ‘loop field’ Category

Geothermal Case Study: ALDI Grocery Store

Tuesday, August 31st, 2010
ALDI Farmington, NY

ALDI Farmington, NY

ALDI has a less-is-more approach to grocery retailing, and everything they do, from selecting suppliers to scouting locations to building and operating stores, facilitates savings substantial enough to impact the every-day living of its customers.

Geothermal heating and cooling is a natural fit for ALDI, and Eagle Mountain worked with ALDI to design and install a geothermal heating and cooling system for its location in Farmington, NY.

ALDI, Eagle Mountain, and APD Engineering & Architecture collaborated to design and implement a geothermal heating and cooling system with an anticipated payback period of 7.3 years.  The Farmington, NY location is ALDI’s first store with geothermal, and this project will be used as a case study for future implementation of geothermal heating and cooling technology.

Geothermal System — Ground Loop

The Farmington, NY site utilizes 3 horizontal slinky geothermal loopfields. The loopfields are 132 feet long and vary in width based on the number of loops.  Two 8-loop fields are located under the parking lot and a smaller 2-loop field is located behind the store in a grassed area.  Redundant circulators can be seen in the following photo:

Loopfield Pump Panel

Loopfield Pump Panel

Geothermal System – Heat Pumps

The geothermal system operates with two 12 ton and one 4 ton horizontal water-to-air Geomax geothermal heat pumps suspended from the ceiling.  A custom designed hydronic pump panel connects the two 12 ton units to the loopfield, and a standard pump pack supplies the smaller 4 ton heat pump.  Hot and cool air is distributed through ducting.

GEOMAX Geothermal Heat Pump

GEOMAX Geothermal Heat Pump

Ducting at Aldi Grocery

Ducting at Aldi Grocery

Geothermal System – Heat Recovery Ventilation (HRV)

The ALDI store uses 2 Fantech Heat Recovery Ventilators (HRV) to increase operational efficiency of the geothermal HVAC system.  HRV units exchange heat between intake and exhaust air, avoiding wasted energy from exhausting conditioned air.

Fantech HRV

Fantech HRV

About ALDI

ALDI entered the U.S. market in 1976, with a handful of stores in southeastern Iowa. Now, over 1,000 U.S. ALDI stores are spreading the savings from Kansas to the East Coast. In its 2008 report, Supermarket News ranked ALDI 25th in U.S. grocery chains in terms of gross sales—a considerable accomplishment given their select assortment and low prices.

Project Overview:

Customer: ALDI

Location: Farmington, NY

Project: Geothermal HVAC system with water-to-air heat pumps.

Web: www.aldifoods.com

Installer: Geocorp

Geothermal Loopfield Flush Cart

Wednesday, April 14th, 2010
Dan Frawley

Dan Frawley

The use of a geothermal flush cart is the last and most important part of any geothermal loopfield installation.  The geothermal flush cart allows you to purge the loopfield of debris and to  fill the loopfield with a glycol/water solution.

Improper purging and filling of a loopfield could result in poor performance or significant damage to your geothermal heat pump.  It’s important that you have the proper equipment.

Purchase or rent your flush cart?

We recommend that you purchase your own flush cart.  As a contractor or certified geothermal installer, it makes good business sense to own a geothermal flush cart.  Renting a flush cart for each project would cost you more in the long term than purchasing a flush cart outright.

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