Abstract: A compact, portable, thermoelectric cold trap for capturing certain gaseous species for analysis in gas chromatographs is disclosed. The U-shaped heat exchanger and T-shaped cold block for holding the adsorbent tube and heater allow the unit to operate over a temperature range from -45.degree. to 300.degree. C. The thermoelectric cold trap is portable and may be retrofitted to new or existing gas chromatographs. The adsorbent tube and heater are also replaceable. A method of assembling the thermoelectric cold trap and a method of operating the thermoelectric cold trap are also disclosed.

Abstract: Connection apparatus for connecting frame members and panel members is provided for constructing a storage building primarily from sheet metal. The apparatus utilizes connecting members that may be made from thermoplastic or metal materials. The number of threaded fasteners and time required to assemble the storage building is reduced dramatically from that of prior designs.

Abstract: A gas engine driven heat pump system including an apparatus and method for exhaust gas dispersion and condensate removal which disperses and mixes exhaust gases more effectively to prevent local icing, inhibit frosting of outdoor heat exchangers, reduce engine noise, and mask exhaust odors, and which removes and treats condensate to further inhibit frosting and corrosion. Dispersion and condensate removal are achieved with exhaust gas distribution and condensate draining features incorporated into the exhaust system of the present invention, and with a fan compartment structure which promotes more complete mixing of exhaust gases and ambient air, while housing both the exhaust system and the outdoor heat exchanger.