ANDREW POPELKA
Pilots at Flint Rd, Acton, MA
License number
Massachusetts A4107369
Issued Date
Feb 2015
Expiration Date
Feb 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
29 Flint Rd, Acton, MA 01720
Professional information
Method And Apparatus For Interior Space Conditioning With Improved Zone Control
US Patent:
5245835, Sep 21, 1993
Filed:
Aug 10, 1992
Appl. No.:
7/927818
Inventors:
Barry M. Cohen - Newton Centre MA
Andrew Popelka - Acton MA
Andrew Popelka - Acton MA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
F25B 2900, F25D 1702
US Classification:
62159
Abstract:
An interior thermal conditioning method and apparatus with improved zone control is disclosed. The thermal conditioning apparatus, such as a heat pump assembly, generates a desired thermal condition which is conveyed by a thermal distribution medium to a number of zones within a multiple zone building. Each zone includes a heat exchange device for receiving the thermal distribution medium. Each zone also includes a thermostat which is used to set a desired temperature range and to indicate the prevailing temperature. When the prevailing temperature is inconsistent with the desired temperature range, a conditioning request is generated. Rather than immediately responding to the conditioning request, the heat pump controller assesses the temperature of the thermal distribution medium to determine whether it is within a target range. If the thermal distribution medium is not within the target range, execution of the conditioning request is delayed while the heat pump is modulated to produce the desired thermal distribution temperature. Additional conditioning requests may be generated during this modulation period.
Apparatus For Condensate Removal
US Patent:
5271237, Dec 21, 1993
Filed:
Dec 10, 1992
Appl. No.:
7/988571
Inventors:
Andrew Popelka - Acton MA
Barry M. Cohen - Newton Centre MA
Barry M. Cohen - Newton Centre MA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
F25D 1702, G05D 1100
US Classification:
62179
Abstract:
In a heating, ventilation and air conditioning system such as a heat pump having a multi-zone hydronic thermal distribution system or such as an air conditioner, a novel condensate removal apparatus removes condensate from each zone fan coil. Each fan coil uses a valve to drain condensate from a fan coil drip pan into a drainage conduit. The drainage conduits from each valve carry condensate to a tank. The tank acts as a manifold for fluid collection from the different fan coils. A single pump draws condensate from fan coils through drainage conduits to the tank. This same pump draws a vacuum in the tank and the drainage conduits. The pump uses a single outlet conduit to discharge condensate.
Rectangular Flexible Duct
US Patent:
5085251, Feb 4, 1992
Filed:
Jun 27, 1990
Appl. No.:
7/544840
Inventors:
Andrew Popelka - Acton MA
Paul H. Sarkisian - Watertown MA
Paul H. Sarkisian - Watertown MA
Assignee:
Electric Power Research Institute - CA
International Classification:
F16L 1111
US Classification:
138119
Abstract:
A rectangular, flexible duct serves as an alternative to galvanized sheet metal duct work installed in homes by utilizing corrugated semi-rigid top and bottom walls with relatively flexible connecting side walls so that the duct may be easily rolled and stored. But when unrolled, it is fastened, for example, between floor joists of a home by use of an overhanging flange formed by one of the top or bottom walls. The duct walls are made of heat resistant plastic suitable for heating and ventilating. Rigidity is provided in the top and bottom walls by corrugations or ribs formed in the plastic.