2005_0509_Packet - Laserfiche WebLink

Home

Mechanical Room The existing mechanical room does not have the safety devices that are required by the current international building codes. There is no mechanical ventilation system, refrigerant leak detection system or an exterior power shunt trip for einer�ency shutdown of the system. There is one vent louver located in the common wall between the mechanical room and the ice rink that allows some arena air to enter the mechanical room. A renovation in the mechanical room will require that these safety devices be installed and we strongly recon�mez�ded that they be installed as well. Since there is no exterior wall far this room the exhaust louver will have to penetrate through the roof. T,�bl�:,� r.�ci��ir:� �i�:tl�.�init�{i9 Rc+c�i� asnF�:�ti�cm�.isls -r�� _ . _ � I. ��tl�ii��r�iri[ �.eSI€ iri��}� ��-�cl ]�in�r�� Sjku101T ?, L��r�s:haisic-al �`�r��ilaticn ��icrr, :'�rls! �"��JLYI:�CL�L L L1F1�SI Ul'I11701 �Ll9IK F..;l;r��al�, I��s i��, �r�� I��n�,1rt��1 iun �'�,ntiir,�nC 3 E�`Yo * — — �{Yi9I �f[7ff.'dL�CI ��i]IIykRIGLlr+ll C'o��ti— - �n I[�C�71 �r_ I._�;3� �uc; :�tl �7 i: i iK[r,3[i 4� I S�o * �__�.. , � � }.—�� - 'I'�FI� I Fastirr��el�d �' F4��Ct �'��s�a .— .- * See explanatioF� in Cost Estimate section of the report �:�� - - --... �7,�� 5��,000 ��?,�i[�f� - -_ '�'�.��70 �? �.�' fJfl . . _. . S�,:I ��i . � ��o Waste Heat Recovery System The existing waste heat recovery system was installed at the same time the refrigeration system was converted from a direct system to an indirect system in 1979-1980. The waste heat recover system captures waste heat from the refrigeration system and uses it for heating the sub-floor heating system beneath the rink floor preventing the build-up of perma-frost, melting snow in the snow melt pit and for space heat at the bleachers. The system warks well except for melting snow in the snow melt pit. The arena staff �ses hot water to supplement the heat provided by the waste heat recovery system to melt the snow shavings. Therefore, instead of capturing "free energy" or waste heat from the refrigeration system as originally intended, the arena is paying to heat water to spray on the snow shavings. It is recommended that the existing system be replaced with a new system designed far the lower head pressures (approx. 150 — 16� psi) that the Arena staff maintains on this system and the additional waste heat that is used for bleacher heating. The cost of this system is included in Table 2B, Ice Rink Floor The existing was installed by the saine company as the refrigeration system in 1979-l9$0. The ice sheet was in place during the site visit so the sand floor could not be inspected. It is known that the ice rink floor is constructed of %z"steel rink piping, 4" to 6" of sand, and 3" to 4" of floor insulation. The 35 year old sand ice rink floor is starting to show its age. The exterior of the steel pipe is apparently severely pitted and corroded. Leaks in the pipe couplings at the header pipes have been on-going since the original installation. Th� ice is typically not taken out once a year, as reco�nn�ended for maintenance, because of the concern of exposing the steel piping to air, accelerating the corrosion, and the movement tliat takes place in t]�e piping location when the system is shut down. There is some evidence that frost is or was present at one tiina beneath the ice ri��.k floor because the floor is settling in the middle. One reason for this settling may be that the frost was not ��